Java压缩包解压到指定文件
在获得一个以Zip格式压缩的文件之后，需要将其进行解压缩，还原成压缩前的文件。若是使用Java自带的压缩工具包来实现解压缩文件到指定文件夹的功能，因为jdk提供的zip只能按UTF-8格式处理，而Windows系统中文件名是以GBK方式编码的，所以如果是解压一个包含中文文件名的zip包，会报非法参数异常，如图所示：
所以要实现解压缩，就得对DeflaterOutputStream.java、InflaterInputStream.java、ZipConstants.java、ZipEntry.java、ZipInputStream.java以及ZipOutputStream.java这些相关的类进行修改，过程如下：
- 因为从 J2SE 1.4 开始，Java 编译器不再支持 import 进未命包名的类、接口，所以在创建的Java项目中，一定要新建一个自己定义的包，包命名的格式一般为学校域名的逆序+自己的网名，比如cn.edu.xidian.crytoll。
- 在包内新建DeflaterOutputStream类，代码如下：
DeflaterOutputStream.java:
package cn.edu.xdian.crytoll;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.Deflater;
/**
* This class implements an output stream filter for compressing data in
* the "deflate" compression format. It is also used as the basis for other
* types of compression filters, such as GZIPOutputStream.
*
* @see Deflater
* @version 1.36, 03/13/06
* @author David Connelly
*/
public
class DeflaterOutputStream extends FilterOutputStream {
/**
* Compressor for this stream.
*/
protected Deflater def;
/**
* Output buffer for writing compressed data.
*/
protected byte[] buf;
/**
* Indicates that the stream has been closed.
*/
private boolean closed = false;
/**
* Creates a new output stream with the specified compressor and
* buffer size.
* @param out the output stream
* @param def the compressor ("deflater")
* @param size the output buffer size
* @exception IllegalArgumentException if size is <= 0
*/
public DeflaterOutputStream(OutputStream out, Deflater def, int size) {
super(out);
if (out == null || def == null) {
throw new NullPointerException();
} else if (size <= 0) {
throw new IllegalArgumentException("buffer size <= 0");
}
this.def = def;
buf = new byte[size];
}
/**
* Creates a new output stream with the specified compressor and
* a default buffer size.
* @param out the output stream
* @param def the compressor ("deflater")
*/
public DeflaterOutputStream(OutputStream out, Deflater def) {
this(out, def, 512);
}
boolean usesDefaultDeflater = false;
/**
* Creates a new output stream with a default compressor and buffer size.
* @param out the output stream
*/
public DeflaterOutputStream(OutputStream out) {
this(out, new Deflater());
usesDefaultDeflater = true;
}
/**
* Writes a byte to the compressed output stream. This method will
* block until the byte can be written.
* @param b the byte to be written
* @exception IOException if an I/O error has occurred
*/
public void write(int b) throws IOException {
byte[] buf = new byte[1];
buf[0] = (byte)(b & 0xff);
write(buf, 0, 1);
}
/**
* Writes an array of bytes to the compressed output stream. This
* method will block until all the bytes are written.
* @param b the data to be written
* @param off the start offset of the data
* @param len the length of the data
* @exception IOException if an I/O error has occurred
*/
public void write(byte[] b, int off, int len) throws IOException {
if (def.finished()) {
throw new IOException("write beyond end of stream");
}
if ((off | len | (off + len) | (b.length - (off + len))) < 0) {
throw new IndexOutOfBoundsException();
} else if (len == 0) {
return;
}
if (!def.finished()) {
// Deflate no more than stride bytes at a time. This avoids
// excess copying in deflateBytes (see Deflater.c)
int stride = buf.length;
for (int i = 0; i < len; i+= stride) {
def.setInput(b, off + i, Math.min(stride, len - i));
while (!def.needsInput()) {
deflate();
}
}
}
}
/**
* Finishes writing compressed data to the output stream without closing
* the underlying stream. Use this method when applying multiple filters
* in succession to the same output stream.
* @exception IOException if an I/O error has occurred
*/
public void finish() throws IOException {
if (!def.finished()) {
def.finish();
while (!def.finished()) {
deflate();
}
}
}
/**
* Writes remaining compressed data to the output stream and closes the
* underlying stream.
* @exception IOException if an I/O error has occurred
*/
public void close() throws IOException {
if (!closed) {
finish();
if (usesDefaultDeflater)
def.end();
out.close();
closed = true;
}
}
/**
* Writes next block of compressed data to the output stream.
* @throws IOException if an I/O error has occurred
*/
protected void deflate() throws IOException {
int len = def.deflate(buf, 0, buf.length);
if (len > 0) {
out.write(buf, 0, len);
}
}
}
3. 在包内新建InflaterInputStream类，代码如下：
InflaterInputStream.java:
package cn.edu.xdian.crytoll;
import java.io.EOFException;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.DataFormatException;
import java.util.zip.Inflater;
import java.util.zip.ZipException;
/**
* This class implements a stream filter for uncompressing data in the
* "deflate" compression format. It is also used as the basis for other
* decompression filters, such as GZIPInputStream.
*
* @see Inflater
* @version 1.40, 04/07/06
* @author David Connelly
*/
public
class InflaterInputStream extends FilterInputStream {
/**
* Decompressor for this stream.
*/
protected Inflater inf;
/**
* Input buffer for decompression.
*/
protected byte[] buf;
/**
* Length of input buffer.
*/
protected int len;
private boolean closed = false;
// this flag is set to true after EOF has reached
private boolean reachEOF = false;
/**
* Check to make sure that this stream has not been closed
*/
private void ensureOpen() throws IOException {
if (closed) {
throw new IOException("Stream closed");
}
}
/**
* Creates a new input stream with the specified decompressor and
* buffer size.
* @param in the input stream
* @param inf the decompressor ("inflater")
* @param size the input buffer size
* @exception IllegalArgumentException if size is <= 0
*/
public InflaterInputStream(InputStream in, Inflater inf, int size) {
super(in);
if (in == null || inf == null) {
throw new NullPointerException();
} else if (size <= 0) {
throw new IllegalArgumentException("buffer size <= 0");
}
this.inf = inf;
buf = new byte[size];
}
/**
* Creates a new input stream with the specified decompressor and a
* default buffer size.
* @param in the input stream
* @param inf the decompressor ("inflater")
*/
public InflaterInputStream(InputStream in, Inflater inf) {
this(in, inf, 512);
}
boolean usesDefaultInflater = false;
/**
* Creates a new input stream with a default decompressor and buffer size.
* @param in the input stream
*/
public InflaterInputStream(InputStream in) {
this(in, new Inflater());
usesDefaultInflater = true;
}
private byte[] singleByteBuf = new byte[1];
/**
* Reads a byte of uncompressed data. This method will block until
* enough input is available for decompression.
* @return the byte read, or -1 if end of compressed input is reached
* @exception IOException if an I/O error has occurred
*/
public int read() throws IOException {
ensureOpen();
return read(singleByteBuf, 0, 1) == -1 ? -1 : singleByteBuf[0] & 0xff;
}
/**
* Reads uncompressed data into an array of bytes. If <code>len</code> is not
* zero, the method will block until some input can be decompressed; otherwise,
* no bytes are read and <code>0</code> is returned.
* @param b the buffer into which the data is read
* @param off the start offset in the destination array <code>b</code>
* @param len the maximum number of bytes read
* @return the actual number of bytes read, or -1 if the end of the
* compressed input is reached or a preset dictionary is needed
* @exception NullPointerException If <code>b</code> is <code>null</code>.
* @exception IndexOutOfBoundsException If <code>off</code> is negative,
* <code>len</code> is negative, or <code>len</code> is greater than
* <code>b.length - off</code>
* @exception ZipException if a ZIP format error has occurred
* @exception IOException if an I/O error has occurred
*/
public int read(byte[] b, int off, int len) throws IOException {
ensureOpen();
if (b == null) {
throw new NullPointerException();
} else if (off < 0 || len < 0 || len > b.length - off) {
throw new IndexOutOfBoundsException();
} else if (len == 0) {
return 0;
}
try {
int n;
while ((n = inf.inflate(b, off, len)) == 0) {
if (inf.finished() || inf.needsDictionary()) {
reachEOF = true;
return -1;
}
if (inf.needsInput()) {
fill();
}
}
return n;
} catch (DataFormatException e) {
String s = e.getMessage();
throw new ZipException(s != null ? s : "Invalid ZLIB data format");
}
}
/**
* Returns 0 after EOF has been reached, otherwise always return 1.
* <p>
* Programs should not count on this method to return the actual number
* of bytes that could be read without blocking.
*
* @return 1 before EOF and 0 after EOF.
* @exception IOException if an I/O error occurs.
*
*/
public int available() throws IOException {
ensureOpen();
if (reachEOF) {
return 0;
} else {
return 1;
}
}
private byte[] b = new byte[512];
/**
* Skips specified number of bytes of uncompressed data.
* @param n the number of bytes to skip
* @return the actual number of bytes skipped.
* @exception IOException if an I/O error has occurred
* @exception IllegalArgumentException if n < 0
*/
public long skip(long n) throws IOException {
if (n < 0) {
throw new IllegalArgumentException("negative skip length");
}
ensureOpen();
int max = (int)Math.min(n, Integer.MAX_VALUE);
int total = 0;
while (total < max) {
int len = max - total;
if (len > b.length) {
len = b.length;
}
len = read(b, 0, len);
if (len == -1) {
reachEOF = true;
break;
}
total += len;
}
return total;
}
/**
* Closes this input stream and releases any system resources associated
* with the stream.
* @exception IOException if an I/O error has occurred
*/
public void close() throws IOException {
if (!closed) {
if (usesDefaultInflater)
inf.end();
in.close();
closed = true;
}
}
/**
* Fills input buffer with more data to decompress.
* @exception IOException if an I/O error has occurred
*/
protected void fill() throws IOException {
ensureOpen();
len = in.read(buf, 0, buf.length);
if (len == -1) {
throw new EOFException("Unexpected end of ZLIB input stream");
}
inf.setInput(buf, 0, len);
}
/**
* Tests if this input stream supports the <code>mark</code> and
* <code>reset</code> methods. The <code>markSupported</code>
* method of <code>InflaterInputStream</code> returns
* <code>false</code>.
*
* @return a <code>boolean</code> indicating if this stream type supports
* the <code>mark</code> and <code>reset</code> methods.
* @see java.io.InputStream#mark(int)
* @see java.io.InputStream#reset()
*/
public boolean markSupported() {
return false;
}
/**
* Marks the current position in this input stream.
*
* <p> The <code>mark</code> method of <code>InflaterInputStream</code>
* does nothing.
*
* @param readlimit the maximum limit of bytes that can be read before
* the mark position becomes invalid.
* @see java.io.InputStream#reset()
*/
public synchronized void mark(int readlimit) {
}
/**
* Repositions this stream to the position at the time the
* <code>mark</code> method was last called on this input stream.
*
* <p> The method <code>reset</code> for class
* <code>InflaterInputStream</code> does nothing except throw an
* <code>IOException</code>.
*
* @exception IOException if this method is invoked.
* @see java.io.InputStream#mark(int)
* @see java.io.IOException
*/
public synchronized void reset() throws IOException {
throw new IOException("mark/reset not supported");
}
}
4. 在包中新建ZipConstants接口，代码如下：
ZipConstants.java:
package cn.edu.xdian.crytoll;
interface ZipConstants {
/*
* Header signatures
*/
static long LOCSIG = 0x04034b50L; // "PK\003\004"
static long EXTSIG = 0x08074b50L; // "PK\007\008"
static long CENSIG = 0x02014b50L; // "PK\001\002"
static long ENDSIG = 0x06054b50L; // "PK\005\006"
/*
* Header sizes in bytes (including signatures)
*/
static final int LOCHDR = 30; // LOC header size
static final int EXTHDR = 16; // EXT header size
static final int CENHDR = 46; // CEN header size
static final int ENDHDR = 22; // END header size
/*
* Local file (LOC) header field offsets
*/
static final int LOCVER = 4; // version needed to extract
static final int LOCFLG = 6; // general purpose bit flag
static final int LOCHOW = 8; // compression method
static final int LOCTIM = 10; // modification time
static final int LOCCRC = 14; // uncompressed file crc-32 value
static final int LOCSIZ = 18; // compressed size
static final int LOCLEN = 22; // uncompressed size
static final int LOCNAM = 26; // filename length
static final int LOCEXT = 28; // extra field length
/*
* Extra local (EXT) header field offsets
*/
static final int EXTCRC = 4; // uncompressed file crc-32 value
static final int EXTSIZ = 8; // compressed size
static final int EXTLEN = 12; // uncompressed size
/*
* Central directory (CEN) header field offsets
*/
static final int CENVEM = 4; // version made by
static final int CENVER = 6; // version needed to extract
static final int CENFLG = 8; // encrypt, decrypt flags
static final int CENHOW = 10; // compression method
static final int CENTIM = 12; // modification time
static final int CENCRC = 16; // uncompressed file crc-32 value
static final int CENSIZ = 20; // compressed size
static final int CENLEN = 24; // uncompressed size
static final int CENNAM = 28; // filename length
static final int CENEXT = 30; // extra field length
static final int CENCOM = 32; // comment length
static final int CENDSK = 34; // disk number start
static final int CENATT = 36; // internal file attributes
static final int CENATX = 38; // external file attributes
static final int CENOFF = 42; // LOC header offset
/*
* End of central directory (END) header field offsets
*/
static final int ENDSUB = 8; // number of entries on this disk
static final int ENDTOT = 10; // total number of entries
static final int ENDSIZ = 12; // central directory size in bytes
static final int ENDOFF = 16; // offset of first CEN header
static final int ENDCOM = 20; // zip file comment length
}
- 在包中新建ZipEntry类，代码如下：
ZipEntry.java:
package cn.edu.xdian.crytoll;
import java.util.Date;
/**
* This class is used to represent a ZIP file entry.
*
* @version 1.42, 01/02/08
* @author David Connelly
*/
public
class ZipEntry implements ZipConstants, Cloneable {
String name; // entry name
long time = -1; // modification time (in DOS time)
long crc = -1; // crc-32 of entry data
long size = -1; // uncompressed size of entry data
long csize = -1; // compressed size of entry data
int method = -1; // compression method
byte[] extra; // optional extra field data for entry
String comment; // optional comment string for entry
/**
* Compression method for uncompressed entries.
*/
public static final int STORED = 0;
/**
* Compression method for compressed (deflated) entries.
*/
public static final int DEFLATED = 8;
static {
/* Zip library is loaded from System.initializeSystemClass */
//initIDs();
}
private static native void initIDs();
/**
* Creates a new zip entry with the specified name.
*
* @param name the entry name
* @exception NullPointerException if the entry name is null
* @exception IllegalArgumentException if the entry name is longer than
* 0xFFFF bytes
*/
public ZipEntry(String name) {
if (name == null) {
throw new NullPointerException();
}
if (name.length() > 0xFFFF) {
throw new IllegalArgumentException("entry name too long");
}
this.name = name;
}
/**
* Creates a new zip entry with fields taken from the specified
* zip entry.
* @param e a zip Entry object
*/
public ZipEntry(ZipEntry e) {
name = e.name;
time = e.time;
crc = e.crc;
size = e.size;
csize = e.csize;
method = e.method;
extra = e.extra;
comment = e.comment;
}
/*
* Creates a new zip entry for the given name with fields initialized
* from the specified jzentry data.
*/
ZipEntry(String name, long jzentry) {
this.name = name;
initFields(jzentry);
}
private native void initFields(long jzentry);
/*
* Creates a new zip entry with fields initialized from the specified
* jzentry data.
*/
ZipEntry(long jzentry) {
initFields(jzentry);
}
/**
* Returns the name of the entry.
* @return the name of the entry
*/
public String getName() {
return name;
}
/**
* Sets the modification time of the entry.
* @param time the entry modification time in number of milliseconds
* since the epoch
* @see #getTime()
*/
public void setTime(long time) {
this.time = javaToDosTime(time);
}
/**
* Returns the modification time of the entry, or -1 if not specified.
* @return the modification time of the entry, or -1 if not specified
* @see #setTime(long)
*/
public long getTime() {
return time != -1 ? dosToJavaTime(time) : -1;
}
/**
* Sets the uncompressed size of the entry data.
* @param size the uncompressed size in bytes
* @exception IllegalArgumentException if the specified size is less
* than 0 or greater than 0xFFFFFFFF bytes
* @see #getSize()
*/
public void setSize(long size) {
if (size < 0 || size > 0xFFFFFFFFL) {
throw new IllegalArgumentException("invalid entry size");
}
this.size = size;
}
/**
* Returns the uncompressed size of the entry data, or -1 if not known.
* @return the uncompressed size of the entry data, or -1 if not known
* @see #setSize(long)
*/
public long getSize() {
return size;
}
/**
* Returns the size of the compressed entry data, or -1 if not known.
* In the case of a stored entry, the compressed size will be the same
* as the uncompressed size of the entry.
* @return the size of the compressed entry data, or -1 if not known
* @see #setCompressedSize(long)
*/
public long getCompressedSize() {
return csize;
}
/**
* Sets the size of the compressed entry data.
* @param csize the compressed size to set to
* @see #getCompressedSize()
*/
public void setCompressedSize(long csize) {
this.csize = csize;
}
/**
* Sets the CRC-32 checksum of the uncompressed entry data.
* @param crc the CRC-32 value
* @exception IllegalArgumentException if the specified CRC-32 value is
* less than 0 or greater than 0xFFFFFFFF
* @see #getCrc()
*/
public void setCrc(long crc) {
if (crc < 0 || crc > 0xFFFFFFFFL) {
throw new IllegalArgumentException("invalid entry crc-32");
}
this.crc = crc;
}
/**
* Returns the CRC-32 checksum of the uncompressed entry data, or -1 if
* not known.
* @return the CRC-32 checksum of the uncompressed entry data, or -1 if
* not known
* @see #setCrc(long)
*/
public long getCrc() {
return crc;
}
/**
* Sets the compression method for the entry.
* @param method the compression method, either STORED or DEFLATED
* @exception IllegalArgumentException if the specified compression
* method is invalid
* @see #getMethod()
*/
public void setMethod(int method) {
if (method != STORED && method != DEFLATED) {
throw new IllegalArgumentException("invalid compression method");
}
this.method = method;
}
/**
* Returns the compression method of the entry, or -1 if not specified.
* @return the compression method of the entry, or -1 if not specified
* @see #setMethod(int)
*/
public int getMethod() {
return method;
}
/**
* Sets the optional extra field data for the entry.
* @param extra the extra field data bytes
* @exception IllegalArgumentException if the length of the specified
* extra field data is greater than 0xFFFF bytes
* @see #getExtra()
*/
public void setExtra(byte[] extra) {
if (extra != null && extra.length > 0xFFFF) {
throw new IllegalArgumentException("invalid extra field length");
}
this.extra = extra;
}
/**
* Returns the extra field data for the entry, or null if none.
* @return the extra field data for the entry, or null if none
* @see #setExtra(byte[])
*/
public byte[] getExtra() {
return extra;
}
/**
* Sets the optional comment string for the entry.
* @param comment the comment string
* @exception IllegalArgumentException if the length of the specified
* comment string is greater than 0xFFFF bytes
* @see #getComment()
*/
public void setComment(String comment) {
if (comment != null && comment.length() > 0xffff/3
&& ZipOutputStream.getUTF8Length(comment) > 0xffff) {
throw new IllegalArgumentException("invalid entry comment length");
}
this.comment = comment;
}
/**
* Returns the comment string for the entry, or null if none.
* @return the comment string for the entry, or null if none
* @see #setComment(String)
*/
public String getComment() {
return comment;
}
/**
* Returns true if this is a directory entry. A directory entry is
* defined to be one whose name ends with a '/'.
* @return true if this is a directory entry
*/
public boolean isDirectory() {
return name.endsWith("/");
}
/**
* Returns a string representation of the ZIP entry.
*/
public String toString() {
return getName();
}
/*
* Converts DOS time to Java time (number of milliseconds since epoch).
*/
private static long dosToJavaTime(long dtime) {
Date d = new Date((int)(((dtime >> 25) & 0x7f) + 80),
(int)(((dtime >> 21) & 0x0f) - 1),
(int)((dtime >> 16) & 0x1f),
(int)((dtime >> 11) & 0x1f),
(int)((dtime >> 5) & 0x3f),
(int)((dtime << 1) & 0x3e));
return d.getTime();
}
/*
* Converts Java time to DOS time.
*/
private static long javaToDosTime(long time) {
Date d = new Date(time);
int year = d.getYear() + 1900;
if (year < 1980) {
return (1 << 21) | (1 << 16);
}
return (year - 1980) << 25 | (d.getMonth() + 1) << 21 |
d.getDate() << 16 | d.getHours() << 11 | d.getMinutes() << 5 |
d.getSeconds() >> 1;
}
/**
* Returns the hash code value for this entry.
*/
public int hashCode() {
return name.hashCode();
}
/**
* Returns a copy of this entry.
*/
public Object clone() {
try {
ZipEntry e = (ZipEntry)super.clone();
e.extra = (extra == null ? null : (byte[])extra.clone());
return e;
} catch (CloneNotSupportedException e) {
// This should never happen, since we are Cloneable
throw new InternalError();
}
}
}
6. 在包中新建ZipInputStream类，代码如下：
ZipInputStream.java:
package cn.edu.xdian.crytoll;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.PushbackInputStream;
import java.io.UnsupportedEncodingException;
import java.util.zip.CRC32;
import java.util.zip.Inflater;
import java.util.zip.ZipException;
/**
* This class implements an input stream filter for reading files in the
* ZIP file format. Includes support for both compressed and uncompressed
* entries.
*
* @author David Connelly
* @version 1.44, 06/15/07
*/
public
class ZipInputStream extends InflaterInputStream implements ZipConstants {
private ZipEntry entry;
private int flag;
private CRC32 crc = new CRC32();
private long remaining;
private byte[] tmpbuf = new byte[512];
private static final int STORED = ZipEntry.STORED;
private static final int DEFLATED = ZipEntry.DEFLATED;
private boolean closed = false;
// this flag is set to true after EOF has reached for
// one entry
private boolean entryEOF = false;
/**
* Check to make sure that this stream has not been closed
*/
private void ensureOpen() throws IOException {
if (closed) {
throw new IOException("Stream closed");
}
}
/**
* Creates a new ZIP input stream.
* @param in the actual input stream
*/
public ZipInputStream(InputStream in) {
super(new PushbackInputStream(in, 512), new Inflater(true), 512);
usesDefaultInflater = true;
if(in == null) {
throw new NullPointerException("in is null");
}
}
/**
* Reads the next ZIP file entry and positions the stream at the
* beginning of the entry data.
* @return the next ZIP file entry, or null if there are no more entries
* @exception ZipException if a ZIP file error has occurred
* @exception IOException if an I/O error has occurred
*/
public ZipEntry getNextEntry() throws IOException {
ensureOpen();
if (entry != null) {
closeEntry();
}
crc.reset();
inf.reset();
if ((entry = readLOC()) == null) {
return null;
}
if (entry.method == STORED) {
remaining = entry.size;
}
entryEOF = false;
return entry;
}
/**
* Closes the current ZIP entry and positions the stream for reading the
* next entry.
* @exception ZipException if a ZIP file error has occurred
* @exception IOException if an I/O error has occurred
*/
public void closeEntry() throws IOException {
ensureOpen();
while (read(tmpbuf, 0, tmpbuf.length) != -1) ;
entryEOF = true;
}
/**
* Returns 0 after EOF has reached for the current entry data,
* otherwise always return 1.
* <p>
* Programs should not count on this method to return the actual number
* of bytes that could be read without blocking.
*
* @return 1 before EOF and 0 after EOF has reached for current entry.
* @exception IOException if an I/O error occurs.
*
*/
public int available() throws IOException {
ensureOpen();
if (entryEOF) {
return 0;
} else {
return 1;
}
}
/**
* Reads from the current ZIP entry into an array of bytes.
* If <code>len</code> is not zero, the method
* blocks until some input is available; otherwise, no
* bytes are read and <code>0</code> is returned.
* @param b the buffer into which the data is read
* @param off the start offset in the destination array <code>b</code>
* @param len the maximum number of bytes read
* @return the actual number of bytes read, or -1 if the end of the
* entry is reached
* @exception NullPointerException If <code>b</code> is <code>null</code>.
* @exception IndexOutOfBoundsException If <code>off</code> is negative,
* <code>len</code> is negative, or <code>len</code> is greater than
* <code>b.length - off</code>
* @exception ZipException if a ZIP file error has occurred
* @exception IOException if an I/O error has occurred
*/
public int read(byte[] b, int off, int len) throws IOException {
ensureOpen();
if (off < 0 || len < 0 || off > b.length - len) {
throw new IndexOutOfBoundsException();
} else if (len == 0) {
return 0;
}
if (entry == null) {
return -1;
}
switch (entry.method) {
case DEFLATED:
len = super.read(b, off, len);
if (len == -1) {
readEnd(entry);
entryEOF = true;
entry = null;
} else {
crc.update(b, off, len);
}
return len;
case STORED:
if (remaining <= 0) {
entryEOF = true;
entry = null;
return -1;
}
if (len > remaining) {
len = (int)remaining;
}
len = in.read(b, off, len);
if (len == -1) {
throw new ZipException("unexpected EOF");
}
crc.update(b, off, len);
remaining -= len;
if (remaining == 0 && entry.crc != crc.getValue()) {
throw new ZipException(
"invalid entry CRC (expected 0x" + Long.toHexString(entry.crc) +
" but got 0x" + Long.toHexString(crc.getValue()) + ")");
}
return len;
default:
throw new ZipException("invalid compression method");
}
}
/**
* Skips specified number of bytes in the current ZIP entry.
* @param n the number of bytes to skip
* @return the actual number of bytes skipped
* @exception ZipException if a ZIP file error has occurred
* @exception IOException if an I/O error has occurred
* @exception IllegalArgumentException if n < 0
*/
public long skip(long n) throws IOException {
if (n < 0) {
throw new IllegalArgumentException("negative skip length");
}
ensureOpen();
int max = (int)Math.min(n, Integer.MAX_VALUE);
int total = 0;
while (total < max) {
int len = max - total;
if (len > tmpbuf.length) {
len = tmpbuf.length;
}
len = read(tmpbuf, 0, len);
if (len == -1) {
entryEOF = true;
break;
}
total += len;
}
return total;
}
/**
* Closes this input stream and releases any system resources associated
* with the stream.
* @exception IOException if an I/O error has occurred
*/
public void close() throws IOException {
if (!closed) {
super.close();
closed = true;
}
}
private byte[] b = new byte[256];
/*
* Reads local file (LOC) header for next entry.
*/
private ZipEntry readLOC() throws IOException {
try {
readFully(tmpbuf, 0, LOCHDR);
} catch (EOFException e) {
return null;
}
if (get32(tmpbuf, 0) != LOCSIG) {
return null;
}
// get the entry name and create the ZipEntry first
int len = get16(tmpbuf, LOCNAM);
int blen = b.length;
if (len > blen) {
do
blen = blen * 2;
while (len > blen);
b = new byte[blen];
}
readFully(b, 0, len);
ZipEntry e = createZipEntry(getUTF8String(b, 0, len));
// now get the remaining fields for the entry
flag = get16(tmpbuf, LOCFLG);
if ((flag & 1) == 1) {
throw new ZipException("encrypted ZIP entry not supported");
}
e.method = get16(tmpbuf, LOCHOW);
e.time = get32(tmpbuf, LOCTIM);
if ((flag & 8) == 8) {
/* "Data Descriptor" present */
if (e.method != DEFLATED) {
throw new ZipException(
"only DEFLATED entries can have EXT descriptor");
}
} else {
e.crc = get32(tmpbuf, LOCCRC);
e.csize = get32(tmpbuf, LOCSIZ);
e.size = get32(tmpbuf, LOCLEN);
}
len = get16(tmpbuf, LOCEXT);
if (len > 0) {
byte[] bb = new byte[len];
readFully(bb, 0, len);
e.setExtra(bb);
}
return e;
}
/*
* Fetches a UTF8-encoded String from the specified byte array.
*/
private static String getUTF8String(byte[] b, int off, int len)
{
try
{
String s = new String(b, off, len, "GBK");
return s;
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}
//以上为新添加的解决GBK乱码的
// First, count the number of characters in the sequence
int count = 0;
int max = off + len;
int i = off;
while (i < max)
{
int c = b[i++] & 0xff;
switch (c >> 4)
{
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
// 0xxxxxxx
count++;
break;
case 12:
case 13:
// 110xxxxx 10xxxxxx
if ((int) (b[i++] & 0xc0) != 0x80)
{
throw new IllegalArgumentException();
}
count++;
break;
case 14:
// 1110xxxx 10xxxxxx 10xxxxxx
if (((int) (b[i++] & 0xc0) != 0x80)
|| ((int) (b[i++] & 0xc0) != 0x80))
{
throw new IllegalArgumentException();
}
count++;
break;
default:
// 10xxxxxx, 1111xxxx
throw new IllegalArgumentException();
}
}
if (i != max)
{
throw new IllegalArgumentException();
}
// Now decode the characters...
char[] cs = new char[count];
i = 0;
while (off < max)
{
int c = b[off++] & 0xff;
switch (c >> 4)
{
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
// 0xxxxxxx
cs[i++] = (char) c;
break;
case 12:
case 13:
// 110xxxxx 10xxxxxx
cs[i++] = (char) (((c & 0x1f) << 6) | (b[off++] & 0x3f));
break;
case 14:
// 1110xxxx 10xxxxxx 10xxxxxx
int t = (b[off++] & 0x3f) << 6;
cs[i++] = (char) (((c & 0x0f) << 12) | t | (b[off++] & 0x3f));
break;
default:
// 10xxxxxx, 1111xxxx
throw new IllegalArgumentException();
}
}
return new String(cs, 0, count);
}
/**
* Creates a new <code>ZipEntry</code> object for the specified
* entry name.
*
* @param name the ZIP file entry name
* @return the ZipEntry just created
*/
protected ZipEntry createZipEntry(String name) {
return new ZipEntry(name);
}
/*
* Reads end of deflated entry as well as EXT descriptor if present.
*/
private void readEnd(ZipEntry e) throws IOException {
int n = inf.getRemaining();
if (n > 0) {
((PushbackInputStream)in).unread(buf, len - n, n);
}
if ((flag & 8) == 8) {
/* "Data Descriptor" present */
readFully(tmpbuf, 0, EXTHDR);
long sig = get32(tmpbuf, 0);
if (sig != EXTSIG) { // no EXTSIG present
e.crc = sig;
e.csize = get32(tmpbuf, EXTSIZ - EXTCRC);
e.size = get32(tmpbuf, EXTLEN - EXTCRC);
((PushbackInputStream)in).unread(
tmpbuf, EXTHDR - EXTCRC - 1, EXTCRC);
} else {
e.crc = get32(tmpbuf, EXTCRC);
e.csize = get32(tmpbuf, EXTSIZ);
e.size = get32(tmpbuf, EXTLEN);
}
}
if (e.size != inf.getBytesWritten()) {
throw new ZipException(
"invalid entry size (expected " + e.size +
" but got " + inf.getBytesWritten() + " bytes)");
}
if (e.csize != inf.getBytesRead()) {
throw new ZipException(
"invalid entry compressed size (expected " + e.csize +
" but got " + inf.getBytesRead() + " bytes)");
}
if (e.crc != crc.getValue()) {
throw new ZipException(
"invalid entry CRC (expected 0x" + Long.toHexString(e.crc) +
" but got 0x" + Long.toHexString(crc.getValue()) + ")");
}
}
/*
* Reads bytes, blocking until all bytes are read.
*/
private void readFully(byte[] b, int off, int len) throws IOException {
while (len > 0) {
int n = in.read(b, off, len);
if (n == -1) {
throw new EOFException();
}
off += n;
len -= n;
}
}
/*
* Fetches unsigned 16-bit value from byte array at specified offset.
* The bytes are assumed to be in Intel (little-endian) byte order.
*/
private static final int get16(byte b[], int off) {
return (b[off] & 0xff) | ((b[off+1] & 0xff) << 8);
}
/*
* Fetches unsigned 32-bit value from byte array at specified offset.
* The bytes are assumed to be in Intel (little-endian) byte order.
*/
private static final long get32(byte b[], int off) {
return get16(b, off) | ((long)get16(b, off+2) << 16);
}
}
7. 在包中新建ZipOutputStream类，代码如下：
ZipOutputStream.java:
package cn.edu.xdian.crytoll;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashSet;
import java.util.Vector;
import java.util.zip.CRC32;
import java.util.zip.Deflater;
import java.util.zip.ZipException;
/**
* This class implements an output stream filter for writing files in the
* ZIP file format. Includes support for both compressed and uncompressed
* entries.
*
* @author David Connelly
* @version 1.35, 07/31/06
*/
public
class ZipOutputStream extends DeflaterOutputStream implements ZipConstants {
private static class XEntry {
public final ZipEntry entry;
public final long offset;
public final int flag;
public XEntry(ZipEntry entry, long offset) {
this.entry = entry;
this.offset = offset;
this.flag = (entry.method == DEFLATED &&
(entry.size == -1 ||
entry.csize == -1 ||
entry.crc == -1))
// store size, compressed size, and crc-32 in data descriptor
// immediately following the compressed entry data
? 8
// store size, compressed size, and crc-32 in LOC header
: 0;
}
}
private XEntry current;
private Vector<XEntry> xentries = new Vector<XEntry>();
private HashSet<String> names = new HashSet<String>();
private CRC32 crc = new CRC32();
private long written = 0;
private long locoff = 0;
private String comment;
private int method = DEFLATED;
private boolean finished;
private boolean closed = false;
private static int version(ZipEntry e) throws ZipException {
switch (e.method) {
case DEFLATED: return 20;
case STORED: return 10;
default: throw new ZipException("unsupported compression method");
}
}
/**
* Checks to make sure that this stream has not been closed.
*/
private void ensureOpen() throws IOException {
if (closed) {
throw new IOException("Stream closed");
}
}
/**
* Compression method for uncompressed (STORED) entries.
*/
public static final int STORED = ZipEntry.STORED;
/**
* Compression method for compressed (DEFLATED) entries.
*/
public static final int DEFLATED = ZipEntry.DEFLATED;
/**
* Creates a new ZIP output stream.
* @param out the actual output stream
*/
public ZipOutputStream(OutputStream out) {
super(out, new Deflater(Deflater.DEFAULT_COMPRESSION, true));
usesDefaultDeflater = true;
}
/**
* Sets the ZIP file comment.
* @param comment the comment string
* @exception IllegalArgumentException if the length of the specified
* ZIP file comment is greater than 0xFFFF bytes
*/
public void setComment(String comment) {
if (comment != null && comment.length() > 0xffff/3
&& getUTF8Length(comment) > 0xffff) {
throw new IllegalArgumentException("ZIP file comment too long.");
}
this.comment = comment;
}
/**
* Sets the default compression method for subsequent entries. This
* default will be used whenever the compression method is not specified
* for an individual ZIP file entry, and is initially set to DEFLATED.
* @param method the default compression method
* @exception IllegalArgumentException if the specified compression method
* is invalid
*/
public void setMethod(int method) {
if (method != DEFLATED && method != STORED) {
throw new IllegalArgumentException("invalid compression method");
}
this.method = method;
}
/**
* Sets the compression level for subsequent entries which are DEFLATED.
* The default setting is DEFAULT_COMPRESSION.
* @param level the compression level (0-9)
* @exception IllegalArgumentException if the compression level is invalid
*/
public void setLevel(int level) {
def.setLevel(level);
}
/**
* Begins writing a new ZIP file entry and positions the stream to the
* start of the entry data. Closes the current entry if still active.
* The default compression method will be used if no compression method
* was specified for the entry, and the current time will be used if
* the entry has no set modification time.
* @param e the ZIP entry to be written
* @exception ZipException if a ZIP format error has occurred
* @exception IOException if an I/O error has occurred
*/
public void putNextEntry(ZipEntry e) throws IOException {
ensureOpen();
if (current != null) {
closeEntry(); // close previous entry
}
if (e.time == -1) {
e.setTime(System.currentTimeMillis());
}
if (e.method == -1) {
e.method = method; // use default method
}
switch (e.method) {
case DEFLATED:
break;
case STORED:
// compressed size, uncompressed size, and crc-32 must all be
// set for entries using STORED compression method
if (e.size == -1) {
e.size = e.csize;
} else if (e.csize == -1) {
e.csize = e.size;
} else if (e.size != e.csize) {
throw new ZipException(
"STORED entry where compressed != uncompressed size");
}
if (e.size == -1 || e.crc == -1) {
throw new ZipException(
"STORED entry missing size, compressed size, or crc-32");
}
break;
default:
throw new ZipException("unsupported compression method");
}
if (! names.add(e.name)) {
throw new ZipException("duplicate entry: " + e.name);
}
current = new XEntry(e, written);
xentries.add(current);
writeLOC(current);
}
/**
* Closes the current ZIP entry and positions the stream for writing
* the next entry.
* @exception ZipException if a ZIP format error has occurred
* @exception IOException if an I/O error has occurred
*/
public void closeEntry() throws IOException {
ensureOpen();
if (current != null) {
ZipEntry e = current.entry;
switch (e.method) {
case DEFLATED:
def.finish();
while (!def.finished()) {
deflate();
}
if ((current.flag & 8) == 0) {
// verify size, compressed size, and crc-32 settings
if (e.size != def.getBytesRead()) {
throw new ZipException(
"invalid entry size (expected " + e.size +
" but got " + def.getBytesRead() + " bytes)");
}
if (e.csize != def.getBytesWritten()) {
throw new ZipException(
"invalid entry compressed size (expected " +
e.csize + " but got " + def.getBytesWritten() + " bytes)");
}
if (e.crc != crc.getValue()) {
throw new ZipException(
"invalid entry CRC-32 (expected 0x" +
Long.toHexString(e.crc) + " but got 0x" +
Long.toHexString(crc.getValue()) + ")");
}
} else {
e.size = def.getBytesRead();
e.csize = def.getBytesWritten();
e.crc = crc.getValue();
writeEXT(e);
}
def.reset();
written += e.csize;
break;
case STORED:
// we already know that both e.size and e.csize are the same
if (e.size != written - locoff) {
throw new ZipException(
"invalid entry size (expected " + e.size +
" but got " + (written - locoff) + " bytes)");
}
if (e.crc != crc.getValue()) {
throw new ZipException(
"invalid entry crc-32 (expected 0x" +
Long.toHexString(e.crc) + " but got 0x" +
Long.toHexString(crc.getValue()) + ")");
}
break;
default:
throw new ZipException("invalid compression method");
}
crc.reset();
current = null;
}
}
/**
* Writes an array of bytes to the current ZIP entry data. This method
* will block until all the bytes are written.
* @param b the data to be written
* @param off the start offset in the data
* @param len the number of bytes that are written
* @exception ZipException if a ZIP file error has occurred
* @exception IOException if an I/O error has occurred
*/
public synchronized void write(byte[] b, int off, int len)
throws IOException
{
ensureOpen();
if (off < 0 || len < 0 || off > b.length - len) {
throw new IndexOutOfBoundsException();
} else if (len == 0) {
return;
}
if (current == null) {
throw new ZipException("no current ZIP entry");
}
ZipEntry entry = current.entry;
switch (entry.method) {
case DEFLATED:
super.write(b, off, len);
break;
case STORED:
written += len;
if (written - locoff > entry.size) {
throw new ZipException(
"attempt to write past end of STORED entry");
}
out.write(b, off, len);
break;
default:
throw new ZipException("invalid compression method");
}
crc.update(b, off, len);
}
/**
* Finishes writing the contents of the ZIP output stream without closing
* the underlying stream. Use this method when applying multiple filters
* in succession to the same output stream.
* @exception ZipException if a ZIP file error has occurred
* @exception IOException if an I/O exception has occurred
*/
public void finish() throws IOException {
ensureOpen();
if (finished) {
return;
}
if (current != null) {
closeEntry();
}
if (xentries.size() < 1) {
throw new ZipException("ZIP file must have at least one entry");
}
// write central directory
long off = written;
for (XEntry xentry : xentries)
writeCEN(xentry);
writeEND(off, written - off);
finished = true;
}
/**
* Closes the ZIP output stream as well as the stream being filtered.
* @exception ZipException if a ZIP file error has occurred
* @exception IOException if an I/O error has occurred
*/
public void close() throws IOException {
if (!closed) {
super.close();
closed = true;
}
}
/*
* Writes local file (LOC) header for specified entry.
*/
private void writeLOC(XEntry xentry) throws IOException {
ZipEntry e = xentry.entry;
int flag = xentry.flag;
writeInt(LOCSIG); // LOC header signature
writeShort(version(e)); // version needed to extract
writeShort(flag); // general purpose bit flag
writeShort(e.method); // compression method
writeInt(e.time); // last modification time
if ((flag & 8) == 8) {
// store size, uncompressed size, and crc-32 in data descriptor
// immediately following compressed entry data
writeInt(0);
writeInt(0);
writeInt(0);
} else {
writeInt(e.crc); // crc-32
writeInt(e.csize); // compressed size
writeInt(e.size); // uncompressed size
}
byte[] nameBytes = getUTF8Bytes(e.name);
writeShort(nameBytes.length);
writeShort(e.extra != null ? e.extra.length : 0);
writeBytes(nameBytes, 0, nameBytes.length);
if (e.extra != null) {
writeBytes(e.extra, 0, e.extra.length);
}
locoff = written;
}
/*
* Writes extra data descriptor (EXT) for specified entry.
*/
private void writeEXT(ZipEntry e) throws IOException {
writeInt(EXTSIG); // EXT header signature
writeInt(e.crc); // crc-32
writeInt(e.csize); // compressed size
writeInt(e.size); // uncompressed size
}
/*
* Write central directory (CEN) header for specified entry.
* REMIND: add support for file attributes
*/
private void writeCEN(XEntry xentry) throws IOException {
ZipEntry e = xentry.entry;
int flag = xentry.flag;
int version = version(e);
writeInt(CENSIG); // CEN header signature
writeShort(version); // version made by
writeShort(version); // version needed to extract
writeShort(flag); // general purpose bit flag
writeShort(e.method); // compression method
writeInt(e.time); // last modification time
writeInt(e.crc); // crc-32
writeInt(e.csize); // compressed size
writeInt(e.size); // uncompressed size
byte[] nameBytes = getUTF8Bytes(e.name);
writeShort(nameBytes.length);
writeShort(e.extra != null ? e.extra.length : 0);
byte[] commentBytes;
if (e.comment != null) {
commentBytes = getUTF8Bytes(e.comment);
writeShort(commentBytes.length);
} else {
commentBytes = null;
writeShort(0);
}
writeShort(0); // starting disk number
writeShort(0); // internal file attributes (unused)
writeInt(0); // external file attributes (unused)
writeInt(xentry.offset); // relative offset of local header
writeBytes(nameBytes, 0, nameBytes.length);
if (e.extra != null) {
writeBytes(e.extra, 0, e.extra.length);
}
if (commentBytes != null) {
writeBytes(commentBytes, 0, commentBytes.length);
}
}
/*
* Writes end of central directory (END) header.
*/
private void writeEND(long off, long len) throws IOException {
int count = xentries.size();
writeInt(ENDSIG); // END record signature
writeShort(0); // number of this disk
writeShort(0); // central directory start disk
writeShort(count); // number of directory entries on disk
writeShort(count); // total number of directory entries
writeInt(len); // length of central directory
writeInt(off); // offset of central directory
if (comment != null) { // zip file comment
byte[] b = getUTF8Bytes(comment);
writeShort(b.length);
writeBytes(b, 0, b.length);
} else {
writeShort(0);
}
}
/*
* Writes a 16-bit short to the output stream in little-endian byte order.
*/
private void writeShort(int v) throws IOException {
OutputStream out = this.out;
out.write((v >>> 0) & 0xff);
out.write((v >>> 8) & 0xff);
written += 2;
}
/*
* Writes a 32-bit int to the output stream in little-endian byte order.
*/
private void writeInt(long v) throws IOException {
OutputStream out = this.out;
out.write((int)((v >>> 0) & 0xff));
out.write((int)((v >>> 8) & 0xff));
out.write((int)((v >>> 16) & 0xff));
out.write((int)((v >>> 24) & 0xff));
written += 4;
}
/*
* Writes an array of bytes to the output stream.
*/
private void writeBytes(byte[] b, int off, int len) throws IOException {
super.out.write(b, off, len);
written += len;
}
/*
* Returns the length of String's UTF8 encoding.
*/
static int getUTF8Length(String s) {
int count = 0;
for (int i = 0; i < s.length(); i++) {
char ch = s.charAt(i);
if (ch <= 0x7f) {
count++;
} else if (ch <= 0x7ff) {
count += 2;
} else {
count += 3;
}
}
return count;
}
/*
* Returns an array of bytes representing the UTF8 encoding
* of the specified String.
*/
private static byte[] getUTF8Bytes(String s) {
char[] c = s.toCharArray();
int len = c.length;
// Count the number of encoded bytes...
int count = 0;
for (int i = 0; i < len; i++) {
int ch = c[i];
if (ch <= 0x7f) {
count++;
} else if (ch <= 0x7ff) {
count += 2;
} else {
count += 3;
}
}
// Now return the encoded bytes...
byte[] b = new byte[count];
int off = 0;
for (int i = 0; i < len; i++) {
int ch = c[i];
if (ch <= 0x7f) {
b[off++] = (byte)ch;
} else if (ch <= 0x7ff) {
b[off++] = (byte)((ch >> 6) | 0xc0);
b[off++] = (byte)((ch & 0x3f) | 0x80);
} else {
b[off++] = (byte)((ch >> 12) | 0xe0);
b[off++] = (byte)(((ch >> 6) & 0x3f) | 0x80);
b[off++] = (byte)((ch & 0x3f) | 0x80);
}
}
return b;
}
}
8. 新建一个Application Window，代码如下：
package cn.edu.xdian.crytoll;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSeparator;
import javax.swing.JSpinner;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableModel;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import cn.edu.xdian.crytoll.ZipEntry;
import cn.edu.xdian.crytoll.ZipInputStream;
import cn.edu.xdian.crytoll.ZipOutputStream;
/**
* 获取文件列表的过滤器
*
* @author 李钟尉
*/
public class UnZipTextFileFrame extends JFrame {
private JPanel contentPane;
private JTextField forderField;
private JTextField templetField;
private File file;
private File dir;
private JTable table;
private JTextField extNameField;
private JSpinner startSpinner;
private JTextField textField;
private JTextField textField_1;
private DefaultTableModel model;
private String filesrc;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
UnZipTextFileFrame frame = new UnZipTextFileFrame();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public UnZipTextFileFrame() {
setResizable(false);
setTitle("压缩包解压到指定文件夹");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 500, 300);
getContentPane().setLayout(null);
textField = new JTextField();
textField.setBounds(10, 10, 158, 21);
getContentPane().add(textField);
textField.setColumns(10);
JButton btnZip = new JButton("Zip\u6587\u4EF6");
btnZip.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_btnZip_actionPerformed(e);
}
});
btnZip.setBounds(178, 9, 93, 23);
getContentPane().add(btnZip);
textField_1 = new JTextField();
textField_1.setBounds(281, 10, 100, 21);
getContentPane().add(textField_1);
textField_1.setColumns(10);
JButton btnNewButton = new JButton("解压到");
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_btnNewButton_actionPerformed(e);
}
});
btnNewButton.setBounds(391, 9, 93, 23);
getContentPane().add(btnNewButton);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(10, 41, 474, 170);
getContentPane().add(scrollPane);
table = new JTable();
scrollPane.setViewportView(table);
model= (DefaultTableModel) table.getModel();
model.setColumnIdentifiers(new Object[] { "序号", "文件名"});
JButton button = new JButton("\u5F00\u59CB\u89E3\u538B\u7F29");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
do_button_actionPerformed(e);
}
});
button.setBounds(178, 221, 100, 23);
getContentPane().add(button);
}
protected void do_btnZip_actionPerformed(ActionEvent e){
JFileChooser chooser = new JFileChooser();// 创建文件选择器
int option = chooser.showOpenDialog(this);// 显示文件打开对话框
if (option == JFileChooser.APPROVE_OPTION) {
file = chooser.getSelectedFile();// 获取选择的文件数组
filesrc=file.getAbsolutePath();
textField.setText(filesrc);// 清空文本框
} else {
textField.setText("");// 清空文本框
}
}
protected void do_btnNewButton_actionPerformed(ActionEvent e){
JFileChooser chooser = new JFileChooser();// 创建文件选择器
// 设置选择器只针对文件夹生效
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
int option = chooser.showOpenDialog(this);// 显示文件打开对话框
if (option == JFileChooser.APPROVE_OPTION) {
dir = chooser.getSelectedFile();// 获取选择的文件夹
textField_1.setText(dir.toString());// 显示文件夹到文本框
} else {
dir = null;
textField_1.setText("");
}
}
protected void do_button_actionPerformed(ActionEvent e){
ZipInputStream zin;
try{
//filesrc=new String(filesrc.getBytes("ISO-8859-1"),"UTF-8");
FileInputStream in = new FileInputStream(filesrc);
zin=new ZipInputStream(in);
ZipEntry entry;
int i=1;
while(((entry=zin.getNextEntry())!=null)&&!entry.isDirectory()){
File file=new File(dir.toString()+"/"+entry.getName());
if(!file.exists()){
file.createNewFile();
}
zin.closeEntry();
Object[] property = new Object[2];
property[0] = i;
property[1] = entry.getName();
model.addRow(property);
i++;
}
}catch(Exception ex){
ex.printStackTrace();
}
}
}
效果如图：
