java Jar 解压压缩 相关代码

package com.mjp.upgrade.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.Manifest;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import org.apache.commons.io.FileUtils;

public class JarUtils {

/**
* 创建空的临时目录
*
* @return
*/
public static File createTempDirectory() {
final String tmpPath = System.getProperty("java.io.tmpdir");
long current = System.currentTimeMillis();
File tmpDir = new File(tmpPath + File.separator + "patchDir" + current);
if (tmpDir.exists()) {
tmpDir.delete();
return createTempDirectory();
}
tmpDir.mkdirs();
return tmpDir;
}

/**
* 解压jar文件
*
* @param jarFile
*            要解压的jar文件路径
* @param destination
*            解压到哪里
* @throws IOException
*/
public static void unJar(String jarFile, String destination) {
File jar = new File(jarFile);
File dir = new File(destination);
unJar(jar, dir);
}

/**
* 解压jar文件
*
* @param jarFile
*            要解压的jar文件路径
* @param destination
*            解压到哪里
* @throws IOException
*/
public static void unJar(File jarFile, File destination) {
JarFile jar = null;
try {
if (destination.exists() == false) {
destination.mkdirs();
}
jar = new JarFile(jarFile);
Enumeration<JarEntry> en = jar.entries();
JarEntry entry = null;
InputStream input = null;
BufferedOutputStream bos = null;
File file = null;
while (en.hasMoreElements()) {
entry = en.nextElement();
input = jar.getInputStream(entry);
file = new File(destination, entry.getName());
if (entry.isDirectory()) {
file.mkdirs();
continue;
} else {
file.getParentFile().mkdirs();
}
bos = new BufferedOutputStream(new FileOutputStream(file));
byte[] buffer = new byte[8192];
int length = -1;
while (true) {
length = input.read(buffer);
if (length == -1)
break;
bos.write(buffer, 0, length);
}
bos.close();
input.close();
// IOUtils.copy(input, bos);
}

Manifest mf = jar.getManifest();
if (mf != null) {
File f = new File(destination, "META-INF/MANIFEST.MF");
File parent = f.getParentFile();
if (parent.exists() == false) {
parent.mkdirs();
}
OutputStream out = new FileOutputStream(f);
mf.write(out);
out.flush();
out.close();
}

} catch (Exception ex) {
ex.printStackTrace();
} finally {
if (jar != null) {
try {
jar.close();
} catch (Exception e) {
}
}
}
}

public static String convertPackageToPath(String packageName) {
String sep = File.separator;
if (packageName.equals("")) {
return sep;
} else {
return packageName.replace(".", sep) + sep;
}
}

/**
* @param packageName
* @param sourceFile
* @param targetJarFile
*/
public static void addFileToJar(String packageName, File sourceFile,
File targetJarFile) {
try {
File tmpDir = createTempDirectory();
unJar(targetJarFile, tmpDir);
String packagePath = convertPackageToPath(packageName);
File targetFile = new File(tmpDir, packagePath);
if(sourceFile.isDirectory()){
FileUtils.copyDirectoryToDirectory(sourceFile, targetFile);
}else{
FileUtils.copyFileToDirectory(sourceFile, targetFile);
}
jar(targetJarFile, tmpDir);
FileUtils.deleteDirectory(tmpDir);
} catch (Exception ex) {
ex.printStackTrace();
}
}

/**
* @param packageName
* @param sourceFile
* @param targetJarFile
*/
public static void delFileFromJar(String packageName, File sourceFile,
File targetJarFile) {
try {
File tmpDir = createTempDirectory();
unJar(targetJarFile, tmpDir);
String packagePath = convertPackageToPath(packageName);
File targetFile = new File(tmpDir, packagePath);
targetFile = new File(targetFile, sourceFile.getName());
if(targetFile.exists()){
targetFile.delete();
}
jar(targetJarFile, tmpDir);
FileUtils.deleteDirectory(tmpDir);
} catch (Exception ex) {
ex.printStackTrace();
}
}


/**
* 压缩临时文件目录为jar文件 替换jarFile
*
* @param jarFile
*            target
* @param tmpDirectory
*/
public static void jar(File jarFile, File tmpDirectory) {
if (jarFile == null || tmpDirectory == null
|| jarFile.exists() == false || tmpDirectory.exists() == false) {
return;
}
try {
ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(
jarFile));
BufferedInputStream bis;
List<File> fileList = getAllFiles(tmpDirectory);
for (int i = 0; i < fileList.size(); i++) {
File file = (File) fileList.get(i);
zos
.putNextEntry(new ZipEntry(getEntryName(tmpDirectory,
file)));
if (file.isDirectory()) {
continue;
}
bis = new BufferedInputStream(new FileInputStream(file));
byte[] buffer = new byte[8192];
int length = -1;
while (true) {
length = bis.read(buffer);
if (length == -1)
break;
zos.write(buffer, 0, length);
}
bis.close();
// IOUtils.copy(bis, zos);
zos.closeEntry();
}
zos.close();
} catch (Exception ex) {
}
}

public static List<File> getAllFiles(File file) {
List<File> result = new ArrayList<File>();
if (file != null) {
if (file.isDirectory()) {
File[] ls = file.listFiles();
for (File t : ls) {
List<File> tLst = getAllFiles(t);
result.addAll(tLst);
}
} else {
result.add(file);
}
}
return result;
}

/**
* 获得zip entry 字符串
*
* @param base
* @param file
* @return
*/
public static String getEntryName(File baseFile, File file) {
String fileName = file.getPath();
String result = "";
try {
if (baseFile.getParentFile().getParentFile() == null) {
result = fileName.substring(baseFile.getPath()
.length());
} else {
result = fileName.substring(baseFile.getPath()
.length() + 1);
}
} catch (Exception e) {
e.printStackTrace();
}
return result;
}

public static void main(String[] args) {
String a = "com.mjp.core.aa";
String b = convertPackageToPath(a);
System.out.println(b);
}

}
==================
以上代码在 linux下运行 打好的 jar ，出问题，原因是没有对 目录entry文件进行处理

以下代码 测试通过：
/**jar -cvf
* @param desJar
* @param jarDir
* @throws Exception
*/
public static void jar(File desJar,File jarDir) throws Exception{
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(desJar));
File[] src = jarDir.listFiles();
jar(out,src);
}

/**
* @param out
* @param src
*/
public static void jar(OutputStream out,File[] src)throws Exception{
jar(out,src,null,null);
}

/**
* @param out
* @param src
*/
public static void jar(OutputStream out,File src)throws Exception{
jar(out,new File[]{src},null,null);
}

/**
* @param out
* @param src
* @param prefix
* @param man
* @throws Exception
*/
public static void jar(OutputStream out,File[] src,String prefix,Manifest man) throws Exception{
JarOutputStream jout = null ;
if (man == null){
jout = new JarOutputStream(out);
}else{
jout = new JarOutputStream(out,man);
}

if(prefix != null && prefix.trim().length() >0 && !prefix.equals("/")){
if(prefix.charAt(0) == '/'){
prefix = prefix.substring(1);
}
if(prefix.charAt(prefix.length() -1) !='/'){
prefix = prefix + "/";
}
}else{
prefix = "";
}
for(File f : src){
jar(f,prefix,jout);
}
jout.close();
}

/**
* @param src
* @param prefix
* @param jout
*/
private static void jar(File src,String prefix,JarOutputStream jout) throws Exception{
if(src.isDirectory()){
prefix = prefix + src.getName() + "/";
ZipEntry entry = new ZipEntry(prefix);
entry.setTime(src.lastModified());
entry.setMethod(JarOutputStream.STORED);
entry.setSize(0l);
entry.setCrc(0l);
jout.putNextEntry(entry);
jout.closeEntry();
File[] files = src.listFiles();
if(files != null){
for(File file : files){
jar(file,prefix,jout);
}
}
}else{
byte[] buffer = new byte[8092];
ZipEntry entry = new ZipEntry(prefix + src.getName());
entry.setTime(src.lastModified());
jout.putNextEntry(entry);
FileInputStream in = new FileInputStream(src);
int len;
while((len = in.read(buffer,0,buffer.length)) != -1){
jout.write(buffer,0,len);
}
in.close();
jout.closeEntry();
}
}




/**jar -xvf
* @param jarFile
* @param unJarDir
*/
public static void unJar(File jarFile,File unJarDir) throws Exception{
BufferedInputStream in = new BufferedInputStream(new FileInputStream(jarFile));
unJar(in,unJarDir);

}

/**
* @param in
* @param unJarDir
*/
public static void unJar(InputStream in,File unJarDir) throws Exception{
if(!unJarDir.exists()){
unJarDir.mkdirs();
}

JarInputStream jin = new JarInputStream(in);
byte[] buffer = new byte[8092];

ZipEntry entry = jin.getNextEntry();
while(entry != null){
String fileName = entry.getName();
if(File.separatorChar != '/'){
fileName = fileName.replace('/', File.separatorChar);
}
if(fileName.charAt(fileName.length() -1 ) == '/'){
fileName = fileName.substring(0,fileName.length() -1);
}
if(fileName.charAt(0)== '/'){
fileName = fileName.substring(1);
}
File file = new File(unJarDir,fileName);
if(entry.isDirectory()){
file.mkdirs();
}else{
File parent = file.getParentFile();
if(!parent.exists()){
parent.mkdirs();
}
BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file));
int len = 0;
while((len = jin.read(buffer,0,buffer.length)) != -1){
out.write(buffer,0,len);
}
out.flush();
out.close();
file.setLastModified(entry.getTime());
}
jin.closeEntry();
entry = jin.getNextEntry();
}

Manifest mf = jin.getManifest();
if(mf != null){
File file = new File(unJarDir,"META-INF/MANIFEST.MF");
File parent = file.getParentFile();
if(!parent.exists()){
parent.mkdirs();
}
OutputStream out = new FileOutputStream(file);
mf.write(out);
out.flush();
out.close();
}

jin.close();
}



public static void main(String[] args) throws Exception {
File jarF = new File("c:/test/a.jar");
File bjar = new File("c:/test/b.jar");
File unJarDir = new File("c:/test/aa");
unJar(jarF, unJarDir);
jar(bjar,unJarDir);
}