docAndoid 向目录拷贝文件
/google/google.htm
/google/google_files/libai11-hp.jpg
/google/google_files/mgyhp_sm.png
1) 测试， 目录打开会报异常，文件打开正常
public void copyAssets()
{
final String kkk = "/data/data/com.ziilabs.magicwares/kkk/";
File folder = new File(kkk);
if(!folder.exists())
{
if(!folder.mkdirs())
{
Log.v("@@@@", "Dir: " + URI_PATH + " create failed ~~~");
}
}
try {
InputStream in = null;
in = this.getResources().getAssets().open("google/google.htm");
Log.v("@@@@", " file : in = ###" + in + "###");
File dataFile = new File(kkk + "google.htm");
FileOutputStream fos = new FileOutputStream(dataFile);
byte buff[] = new byte[1024];
do
{
int numread = in.read(buff);
if(numread <= 0)
{
break;
}
fos.write(buff,0,numread);
} while(true);
in.close();
fos.close();
} catch (FileNotFoundException e2) {
// TODO Auto-generated catch block
Log.v("@@@@", " write file" + " FileNotFoundException ");
e2.printStackTrace();
} catch (IOException e2) {
// TODO Auto-generated catch block
Log.v("@@@@", " write file" + " FileNotFoundException ");
e2.printStackTrace();
}
try {
InputStream in = null;
in = this.getResources().getAssets().open("google/google_files");
Log.v("@@@@", " folder : in = ###" + in + "###");
File dataFile = new File(kkk + "google_files");
FileOutputStream fos = new FileOutputStream(dataFile);
byte buff[] = new byte[1024];
do
{
int numread = in.read(buff);
if(numread <= 0)
{
break;
}
fos.write(buff,0,numread);
} while(true);
in.close();
fos.close();
} catch (FileNotFoundException e4) {
// TODO Auto-generated catch block
Log.v("@@@@", " write folder" + " FileNotFoundException ");
e4.printStackTrace();
} catch (IOException e4) {
// TODO Auto-generated catch block
Log.v("@@@@", " write folder " + " FileNotFoundException ");
e4.printStackTrace();
}
}
2) 通过异常来判断是文件还是目录，写递归函数，下面事参考的网上的代码
http://www.etongsou.com/soso_detail_1413.htm
public void FindFile(string dir) //参数为指定的目录
{
//在指定目录及子目录下查找文件,在listBox1中列出子目录及文件
DirectoryInfo Dir = new DirectoryInfo(dir);
try
{
foreach(DirectoryInfo d in Dir.GetDirectories()) //查找子目录
{
FindFile(Dir+d.ToString()+"//");
listBox1.Items.Add(Dir+d.ToString()+"//"); //listBox1中填加目录名
}
foreach(FileInfo f in Dir.GetFiles("*.*")) //查找文件
{
listBox1.Items.Add(Dir+f.ToString()); //listBox1中填加文件名
}
}
catch(Exception e)
{
MessageBox.Show(e.Message);
}
}
递归的创建文件夹和拷贝文件java代码：
static String WEBPAGE = "/data/data/com.ziilabs.magicwares/webpage/";
final static String FOLDER = "webpage";
final static String APP = "/data/data/com.ziilabs.magicwares/";
//把assets目录里面的webpage文件夹拷贝到/data/data/com.ziilabs.magicwares/下
// assets/webpage/* ---> //data/data/com.ziilabs.magicwares/webpage/
public void copyAssets() {
File webpage = new File(WEBPAGE);
webpage.mkdir();
if (!webpage.exists()) {
Log.v("copyAssets" , " failed create ! " + webpage);
}
findFile(FOLDER);
}
public void findFile (String assDir) {
//get both folder and file name
String[] files;
try
{
files = this.getResources().getAssets().list(assDir);
}
catch (IOException e1)
{
return;
}
//Log.v(" <findFile> ", "files.length = " + files.length);
for (int i = 0; i < files.length; i++) {
Log.v(" <findFile> ", "dir:" + assDir + "/" + files[i]);
String assFile = assDir + "/" + files[i];
handlerFiles(assFile);
}
}
public void handlerFiles(String assDir) { //
String filePath = APP + assDir;
File file = new File(filePath);
//Log.v(" handlerFiles ", " : " + file);
if (!file.exists()) { // "google.htm"
try { //file
InputStream in = this.getResources().getAssets().open(assDir);
FileOutputStream fos = new FileOutputStream(file);
byte buff[] = new byte[1024];
do
{
int numread = in.read(buff);
if(numread <= 0)
{
break;
}
fos.write(buff,0,numread);
}while(true);
in.close();
fos.close();
} catch (FileNotFoundException e) { // folder
// TODO Auto-generated catch block
//Log.v("@@@@", " Folder " + filePath);
File folder = new File(filePath);
folder.mkdir();
findFile(assDir);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//Log.v(" handlerFiles ", " : " + file + " end /n/n");
}
}
2
用tar来实现关键代码
static String GUIDE_NAME = "webpage.tar";
static String URI_PATH = "/data/data/com.ziilabs.magicwares/files/";
private static final String MODEL3 = URI_PATH + "webpage.tar";
String cmdStrs1[] = new String[]{"tar", "-xf" , MODEL3 , "-C" , URI_PATH};
private static final String FILE3 = URI_PATH + "webpage/Google.html";
public void CmdExec(String[] cmdline) {
try {
String line;
Process p = null;
if (p != null) {
p.destroy();
p = null;
}
p = Runtime.getRuntime().exec(cmdline);
BufferedReader input = new BufferedReader(new InputStreamReader(p
.getInputStream()));
line = input.readLine();
while (line != null) {
line = input.readLine();
System.out.println(line);
}
input.close();
p.waitFor();
int ret = p.exitValue();
System.out.println(ret);
} catch (Exception err) {
err.printStackTrace();
}
}
public void loadRes()
{
File folder = new File(URI_PATH);
if( !folder.exists() ) {
Log.v("@@@@", "Dir: " + URI_PATH + " not exsit ~~~");
folder.mkdir();
if( !folder.exists() ) {
Log.v("@@@@", "Dir: " + URI_PATH + " create faild ~~~");
} else {
Log.v("@@@@", "Dir: " + URI_PATH + " create suc ~~~");
}
InputStream in = getResources().openRawResource(R.raw.webpage);
File file = new File(URI_PATH + GUIDE_NAME);
try {
FileOutputStream fos = new FileOutputStream(file);
byte buff[] = new byte[1024];
do
{
int numread = in.read(buff);
if(numread <= 0)
{
break;
}
fos.write(buff,0,numread);
}while(true);
in.close();
fos.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
Log.v("@@@@", "Dir: " + URI_PATH + " FileNotFoundException ");
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
Log.v("@@@@", "Dir: " + URI_PATH + GUIDE_NAME + " file IOException");
e.printStackTrace();
}
}
else {
Log.v("@@@@", "Dir: " + URI_PATH + " aready exsit ~~~");
}
}
int main {
//do some handle
loadRes();
CmdExec(cmdStrs1);
...
//
}
3 网上的解压zip的方法，没有测试（下面是转载）
网址： http://gavinju.javaeye.com/blog/100087
Java解压Zip文件
近日,在别的Java论坛上看到有人贴出的Java解压Zip的源码，据说是有问题，小弟昨日小做测试，没有问题.
现在,我贴出经过测试后的源码供大家研究学习:
package com.hand;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class Zip {
/**
* @param args
*/
public static int iCompressLevel; //压缩比 取值范围为0~9
public static boolean bOverWrite; //是否覆盖同名文件 取值范围为True和False
private static ArrayList allFiles = new ArrayList();
public static String sErrorMessage;
public static ArrayList Ectract(String sZipPathFile, String sDestPath){
ArrayList allFileName = new ArrayList();
try{
//先指定压缩档的位置和档名，建立FileInputStream对象
FileInputStream fins = new FileInputStream(sZipPathFile);
//将fins传入ZipInputStream中
ZipInputStream zins = new ZipInputStream(fins);
ZipEntry ze = null;
byte ch[] = new byte[256];
while((ze = zins.getNextEntry()) != null){
File zfile = new File(sDestPath + ze.getName());
File fpath = new File(zfile.getParentFile().getPath());
if(ze.isDirectory()){
if(!zfile.exists())
zfile.mkdirs();
zins.closeEntry();
}else{
if(!fpath.exists())
fpath.mkdirs();
FileOutputStream fouts = new FileOutputStream(zfile);
int i;
allFileName.add(zfile.getAbsolutePath());
while((i = zins.read(ch)) != -1)
fouts.write(ch,0,i);
zins.closeEntry();
fouts.close();
}
}
fins.close();
zins.close();
sErrorMessage = "OK";
}catch(Exception e){
System.err.println("Extract error:" + e.getMessage());
sErrorMessage = e.getMessage();
}
allFiles.clear();
return allFileName;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
Zip z = new Zip();
ArrayList a = new ArrayList();
a = z.Ectract("c://src.zip", "c://");
System.out.println(a.size());
}
}
注: 解压C盘根目录下文件src.zip到C盘根目录.
另:附录一将一个字符串分割为子字符串，然后将结果作为字符串数组返回的有用的Java程序.关于split()方法的使用
package com.hand.tools;
public class SplitDemo {
public static String[] ss = new String[20];
public SplitDemo(){
String s = "The test in String start action success";
//在每个空格字符处进行分解
ss = s.split(" ");
}
/**
* @param args
* 将一个字符串分割为子字符串，然后将结果作为字符串数组返回。
* java.lang.string.split
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
SplitDemo demo = new SplitDemo();
System.out.println("test the length="+ss.length);
for(int i=0; i < ss.length; i++){
System.out.println(ss[i]);
}
System.out.println("the last element is : "+ ss[6]);
}
}
运行返回结果:
test the length=7
The
test
in
String
start
action
success
the last element is : success