1. 解析zip文件读取文件流：
package test;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
public class aaaa {
public static void main(String[] args) throws Exception {
try {
readZipFile("D:\\ztree.zip");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void readZipFile(String file) throws Exception {
ZipFile zf = new ZipFile(file);
InputStream in = new BufferedInputStream(new FileInputStream(file));
ZipInputStream zin = new ZipInputStream(in);
ZipEntry ze;
while ((ze = zin.getNextEntry()) != null) {
if (ze.isDirectory()) {
} else {
System.err.println("file - " + ze.getName() + " : "
+ ze.getSize() + " bytes");
long size = ze.getSize();
if (size > 0) {
BufferedReader br = new BufferedReader(
new InputStreamReader(zf.getInputStream(ze)));
String line;
while ((line = br.readLine()) != null) {
System.out.println(line);
}
br.close();
}
System.out.println();
}
}
zin.closeEntry();
}
}
2、读取文件，压缩zip并下载；
//java自带的类库，实现zip压缩打包文件下载, 不支持中文文件名
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Date;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class test {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", "attachment; filename=" + this.getZipFilename());
System.out.println("in BatchDownload................");
ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());
File[] files = new File[2];
files[0] = new File("D:/OptiCM-POC/KDKK3Project/KDKK/images/1.jpg");
files[1] = new File("D:/OptiCM-POC/KDKK3Project/KDKK/images/2.jpg");
zipFile(files, "", zos);
zos.flush();
zos.close();
}
private void zipFile(File[] subs, String baseName, ZipOutputStream zos) throws IOException {
for (int i = 0; i < subs.length; i++) {
File f = subs[i];
zos.putNextEntry(new ZipEntry(baseName + f.getName()));
FileInputStream fis = new FileInputStream(f);
byte[] buffer = new byte[1024];
int r = 0;
while ((r = fis.read(buffer)) != -1) {
zos.write(buffer, 0, r);
}
fis.close();
}
}
private String getZipFilename() {
Date date = new Date();
String s = date.getTime() + ".zip";
return s;
}
}
3、java操作文件(压缩文件，导出zip,删除zip,写入文件，读取文件)
//压缩文件(防止中文乱码----使用apache的ZipOutputStream包)
private static void writeZip(String[] strs,String zipname,String temppath) throws IOException {
String[] files = strs;
OutputStream os = new BufferedOutputStream(new FileOutputStream(temppath+"//"+zipname));
ZipOutputStream zos = new ZipOutputStream(os);
byte[] buf = new byte[8192];
int len;
for (int i=0;i 0 ) {
zos.write( buf, 0, len );
}
zos.closeEntry();
bis.close();
}
zos.setEncoding("GBK");
for(int i=0;i 0 ) //切忌这后面不能加 分号 ”;“
{
os.write(buf, 0, len);//向客户端输出，实际是把数据存放在response中，然后web服务器再去response中读取
}
in.close();
os.close();
deleteZip(temppath);//导出后删除zip
/**
* 追加文件：使用FileWriter---写入
*/
public static void appendMethodB(String fileName, StringBuffer content) {
try {
//打开一个写文件器，构造函数中的第二个参数true表示以追加形式写文件
FileWriter writer = new FileWriter(fileName, true);
/*OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream(fileName, true),"UTF-8");
osw.write(content);
osw.close();*/
writer.write(content.toString());
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 功能：Java读取txt文件的内容
* 步骤：1：先获得文件句柄
* 2：获得文件句柄当做是输入一个字节码流，需要对这个输入流进行读取
* 3：读取到输入流后，需要读取生成字节流
* 4：一行一行的输出。readline()。
* 备注：需要考虑的是异常情况
* @param filePath
*/
public static ArrayList readTxtFile(String filePath){
ArrayList readList = new ArrayList();
try {
String encoding="GBK";
File file=new File(filePath);
if(file.isFile() && file.exists()){ //判断文件是否存在
InputStreamReader read = new InputStreamReader(
new FileInputStream(file),encoding);//考虑到编码格式
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
while((lineTxt = bufferedReader.readLine()) != null){
readList.add(lineTxt);
}
read.close();
}else{
System.out.println("找不到指定的文件");
}
} catch (Exception e) {
System.out.println("读取文件内容出错");
e.printStackTrace();
}
return readList;
}