java壓縮與解壓（Java.util.zip）

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

/**

文件解壓縮
*
@author Tony
/
public final class FileToZip {
FileToZip() {
}
/**

將存放在sourceFilePath目錄下的源文件,打包成fileName名稱的ZIP文件,并存放到zipFilePath。
*
@param sourceFilePath
待壓縮的文件路徑
@param zipFilePath
壓縮后存放路徑
@param fileName
壓縮后文件的名稱
@return flag
*/
public static boolean fileToZip(String sourceFilePath, String zipFilePath,

                         String fileName) {

boolean flag = false;
 File sourceFile = new File(sourceFilePath);
 FileInputStream fis = null;
 BufferedInputStream bis = null;
 FileOutputStream fos = null;
 ZipOutputStream zos = null;
if (sourceFile.exists() == false) {

 System.out.println(">>>>>> 待壓縮的文件目錄：" + sourceFilePath
                    + " 不存在. <<<<<<");

} else {

 try {
     File zipFile = new File(zipFilePath + "/" + fileName + ".RAR");
     //                File zipFile = new File(zipFilePath + "/" + fileName + ".zip");
     if (zipFile.exists()) {
         System.out.println(">>>>>> " + zipFilePath + " 目錄下存在名字為："
                            + fileName + ".RAR" + " 打包文件. <<<<<<");
     } else {
         File[] sourceFiles = sourceFile.listFiles();
         if (null == sourceFiles || sourceFiles.length < 1) {
             System.out.println(">>>>>> 待壓縮的文件目錄：" + sourceFilePath
                                + " 里面不存在文件,無需壓縮. <<<<<<");
         } else {
             fos = new FileOutputStream(zipFile);
             zos = new ZipOutputStream(new BufferedOutputStream(fos));
             byte[] bufs = new byte[1024 * 10];
             for (int i = 0; i < sourceFiles.length; i++) {
                 // 創建ZIP實體,并添加進壓縮包
                 ZipEntry zipEntry = new ZipEntry(sourceFiles[i]
                                                  .getName());
                 zos.putNextEntry(zipEntry);
                 // 讀取待壓縮的文件并寫進壓縮包里
                 fis = new FileInputStream(sourceFiles[i]);
                 bis = new BufferedInputStream(fis, 1024 * 10);
                 int read = 0;
                 while ((read = bis.read(bufs, 0, 1024 * 10)) != -1) {
                     zos.write(bufs, 0, read);
                 }
             }
             flag = true;
         }
     }
 } catch (FileNotFoundException e) {
     e.printStackTrace();
     throw new RuntimeException(e);
 } catch (IOException e) {
     e.printStackTrace();
     throw new RuntimeException(e);
 } finally {
     // 關閉流
     try {
         if (null != bis)
             bis.close();
         if (null != zos)
             zos.close();
     } catch (IOException e) {
         e.printStackTrace();
         throw new RuntimeException(e);
     }
 }

}
return flag;
}
public static void unZip(String sourceFilePath, String unzipFilePath) {
 File sourceFile = new File(sourceFilePath);
 ZipFile zipFile = null;
 ZipEntry zipEntry = null;
 ZipInputStream zis = null;
 FileOutputStream fos = null;
 FileInputStream fis = null;
if (sourceFile.exists() == false) {

 System.out.println(">>>>>> 待解壓的文件目錄：" + sourceFilePath
                    + " 不存在. <<<<<<");

} else {

 try {
     System.out.println(">>>>>> 開始解壓：" + sourceFilePath + " <<<<<<");
     zipFile = new ZipFile(sourceFile);
     zis = new ZipInputStream(new FileInputStream(sourceFile));
     while ((zipEntry = zis.getNextEntry()) != null) {
         String fileName = zipEntry.getName();
         File temp = new File(unzipFilePath + "\\" + fileName);
         System.out.println(fileName + ">>>>>>解壓到" + unzipFilePath);
         if (!temp.getParentFile().exists()) {
             temp.getParentFile().mkdirs();
         }
         fos = new FileOutputStream(temp);
         InputStream is = zipFile.getInputStream(zipEntry);
         int len = 0;
         while ((len = is.read()) != -1) {
             fos.write(len);
         }
         is.close();
     }

 } catch (FileNotFoundException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
 } catch (ZipException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
 } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
 } finally {
     // 關閉流
     try {
         if (null != fos)
             fos.close();
         if (null != fis)
             fis.close();
         if (null != zis)
             zis.close();
     } catch (IOException e) {
         e.printStackTrace();
         throw new RuntimeException(e);
     }
 }

}
}
/**

將文件打包成ZIP壓縮文件,main方法測試
*
@param args
*/
public static void main(String[] args) {
 String sourceFilePath = "D:\sss\lp20120301.rar";
 // String zipFilePath = "D:\sss";
 // String fileName = "lp20120301";
 // boolean flag = FileToZip.fileToZip(sourceFilePath, zipFilePath,
 // fileName);
 // if(flag) {
 // System.out.println(">>>>>> 文件打包成功. <<<<<<");
 // } else {
 // System.out.println(">>>>>> 文件打包失敗. <<<<<<");
 // }
 FileToZip.unZip(sourceFilePath, "E:\sdf");
}
}</pre>