java压缩和解压缩例子

java压缩和解压缩例子
压缩时，在压缩文件夹中新建目录，entry名称必须以“/”结尾。
压缩后，如果用rar工具解压，发现中文名称的文件都是乱码，但是如果用java程序解压就不会有事，网上有很多关于这个问题及解决方案

Java代码 
/**按照POS目录要求压缩文件 
 * @param out 
 * @param f 
 * @param base 
 * @param serverTime 14位的时间戳 
 * @param buzName 业务名称 
 * @throws Exception 
 */ 
public static void zip4Pos(String zipFileName, String inputPath, String base, String buzName, String serverTime)  
{  
    File f = new File(inputPath);  
    ZipOutputStream out;  
    logger.info("正在压缩：" + f.getName() + "... ...");  
    try 
    {  
        out = new ZipOutputStream(new FileOutputStream(zipFileName));  
        String buzp = buzName + "/";  
        String yp = buzp + serverTime.substring(0,4)+"/";  
        String mp = yp + serverTime.substring(4,6)+"/";  
        out.putNextEntry(new ZipEntry(buzp));   
        out.putNextEntry(new ZipEntry(yp));   
        out.putNextEntry(new ZipEntry(mp));   
        base = mp + f.getName();  
        zip(out, f, base);  
        out.close();  
    }  
    catch (Exception e)  
    {  
        logger.error(e);  
        e.printStackTrace();  
    }  
      
}  
      
 
private static void zip(ZipOutputStream out, File f, String base)  
        throws Exception  
{  
    logger.info("正在压缩：" + f.getName() + "... ...");  
    if (f.isDirectory())  
    {  
        File[] fs = f.listFiles();  
        base += "/";  
        logger.info("新建目录条目：" + f.getName());  
        out.putNextEntry(new ZipEntry(base)); // 生成相应的目录  
        for (int i = 0; i < fs.length; i++)  
        {  
            // 对本目录下的所有文件对象递归调用本方法  
            zip(out, fs[i], base + fs[i].getName());  
        }  
    }  
    else 
    {  
        logger.info("新增文件条目：" + f.getName());  
        out.putNextEntry(new ZipEntry(base));  
        InputStream is = new FileInputStream(f);  
        byte[] buf = new byte[1024];  
        int len = 0;  
        while ((len = is.read(buf)) != -1)  
        {  
            out.write(buf, 0, len);  
        }  
        is.close();  
    }  
}  
 
/** 
 * 解压缩文件 
 * @param zipFile  
 * @param desPath 
 */ 
public static void unZip(File zipFile, String desPath)  
{  
 
    // 建立输出流，用于将从压缩文件中读出的文件流写入到磁盘  
    OutputStream out = null;  
    // 建立输入流，用于从压缩文件中读出文件  
    ZipInputStream is;  
    try 
    {  
        is = new ZipInputStream(new FileInputStream(zipFile));  
        ZipEntry entry = null;  
        while ((entry = is.getNextEntry()) != null)  
        {  
            logger.info("正在解压缩：" + entry.getName() + "... ...");  
            File f = new File(desPath + "\\" + entry.getName());  
            if (entry.isDirectory())  
            {  
                logger.info("新建目录：" + f.getName());  
                f.mkdir();  
            }  
            else 
            {  
                logger.info("新增文件：" + f.getName());  
                // 根据压缩文件中读出的文件名称新建文件  
                out = new FileOutputStream(f);  
                byte[] buf = new byte[1024];  
                int len = 0;  
                while ((len = is.read(buf)) != -1)  
                {  
                    out.write(buf, 0, len);  
                }  
                out.close();  
            }  
        }  
        is.close();  
    }  
    catch (Exception e)  
    {  
        logger.error(e);  
    }  
} 

 

 

由于java.util.zip.ZipOutputStream有中文乱码问题，所以采用org.apache.tools.zip.ZipOutputStream。
以下是代码：
Java代码 
package net.szh.zip;  
 
import java.io.BufferedInputStream;  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileOutputStream;  
import java.util.zip.CRC32;  
import java.util.zip.CheckedOutputStream;  
 
import org.apache.tools.zip.ZipEntry;  
import org.apache.tools.zip.ZipOutputStream;  
 
public class ZipCompressor {  
    static final int BUFFER = 8192;  
 
    private File zipFile;  
 
    public ZipCompressor(String pathName) {  
        zipFile = new File(pathName);  
    }  
 
    public void compress(String srcPathName) {  
        File file = new File(srcPathName);  
        if (!file.exists())  
            throw new RuntimeException(srcPathName + "不存在！");  
        try {  
            FileOutputStream fileOutputStream = new FileOutputStream(zipFile);  
            CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,  
                    new CRC32());  
            ZipOutputStream out = new ZipOutputStream(cos);  
            String basedir = "";  
            compress(file, out, basedir);  
            out.close();  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        }  
    }  
 
    private void compress(File file, ZipOutputStream out, String basedir) {  
        /* 判断是目录还是文件 */ 
        if (file.isDirectory()) {  
            System.out.println("压缩：" + basedir + file.getName());  
            this.compressDirectory(file, out, basedir);  
        } else {  
            System.out.println("压缩：" + basedir + file.getName());  
            this.compressFile(file, out, basedir);  
        }  
    }  
 
    /** 压缩一个目录 */ 
    private void compressDirectory(File dir, ZipOutputStream out, String basedir) {  
        if (!dir.exists())  
            return;  
 
        File[] files = dir.listFiles();  
        for (int i = 0; i < files.length; i++) {  
            /* 递归 */ 
            compress(files[i], out, basedir + dir.getName() + "/");  
        }  
    }  
 
    /** 压缩一个文件 */ 
    private void compressFile(File file, ZipOutputStream out, String basedir) {  
        if (!file.exists()) {  
            return;  
        }  
        try {  
            BufferedInputStream bis = new BufferedInputStream(  
                    new FileInputStream(file));  
            ZipEntry entry = new ZipEntry(basedir + file.getName());  
            out.putNextEntry(entry);  
            int count;  
            byte data[] = new byte[BUFFER];  
            while ((count = bis.read(data, 0, BUFFER)) != -1) {  
                out.write(data, 0, count);  
            }  
            bis.close();  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        }  
    }  
} 

package net.szh.zip;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;

public class ZipCompressor {
 static final int BUFFER = 8192;

 private File zipFile;

 public ZipCompressor(String pathName) {
  zipFile = new File(pathName);
 }

 public void compress(String srcPathName) {
  File file = new File(srcPathName);
  if (!file.exists())
   throw new RuntimeException(srcPathName + "不存在！");
  try {
   FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
   CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,
     new CRC32());
   ZipOutputStream out = new ZipOutputStream(cos);
   String basedir = "";
   compress(file, out, basedir);
   out.close();
  } catch (Exception e) {
   throw new RuntimeException(e);
  }
 }

 private void compress(File file, ZipOutputStream out, String basedir) {
  /* 判断是目录还是文件 */
  if (file.isDirectory()) {
   System.out.println("压缩：" + basedir + file.getName());
   this.compressDirectory(file, out, basedir);
  } else {
   System.out.println("压缩：" + basedir + file.getName());
   this.compressFile(file, out, basedir);
  }
 }

 /** 压缩一个目录 */
 private void compressDirectory(File dir, ZipOutputStream out, String basedir) {
  if (!dir.exists())
   return;

  File[] files = dir.listFiles();
  for (int i = 0; i < files.length; i++) {
   /* 递归 */
   compress(files[i], out, basedir + dir.getName() + "/");
  }
 }

 /** 压缩一个文件 */
 private void compressFile(File file, ZipOutputStream out, String basedir) {
  if (!file.exists()) {
   return;
  }
  try {
   BufferedInputStream bis = new BufferedInputStream(
     new FileInputStream(file));
   ZipEntry entry = new ZipEntry(basedir + file.getName());
   out.putNextEntry(entry);
   int count;
   byte data[] = new byte[BUFFER];
   while ((count = bis.read(data, 0, BUFFER)) != -1) {
    out.write(data, 0, count);
   }
   bis.close();
  } catch (Exception e) {
   throw new RuntimeException(e);
  }
 }
}

后来发现原来可以用ant中的org.apache.tools.ant.taskdefs.Zip来实现，更加简单。
Java代码 
package net.szh.zip;  
 
import java.io.File;  
 
import org.apache.tools.ant.Project;  
import org.apache.tools.ant.taskdefs.Zip;  
import org.apache.tools.ant.types.FileSet;  
 
public class ZipCompressorByAnt {  
 
    private File zipFile;  
 
    public ZipCompressorByAnt(String pathName) {  
        zipFile = new File(pathName);  
    }  
      
    public void compress(String srcPathName) {  
        File srcdir = new File(srcPathName);  
        if (!srcdir.exists())  
            throw new RuntimeException(srcPathName + "不存在！");  
          
        Project prj = new Project();  
        Zip zip = new Zip();  
        zip.setProject(prj);  
        zip.setDestFile(zipFile);  
        FileSet fileSet = new FileSet();  
        fileSet.setProject(prj);  
        fileSet.setDir(srcdir);  
        //fileSet.setIncludes("**/*.java"); 包括哪些文件或文件夹 eg:zip.setIncludes("*.java");  
        //fileSet.setExcludes(...); 排除哪些文件或文件夹  
        zip.addFileset(fileSet);  
          
        zip.execute();  
    }  
} 

package net.szh.zip;

import java.io.File;

import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Zip;
import org.apache.tools.ant.types.FileSet;

public class ZipCompressorByAnt {

 private File zipFile;

 public ZipCompressorByAnt(String pathName) {
  zipFile = new File(pathName);
 }
 
 public void compress(String srcPathName) {
  File srcdir = new File(srcPathName);
  if (!srcdir.exists())
   throw new RuntimeException(srcPathName + "不存在！");
  
  Project prj = new Project();
  Zip zip = new Zip();
  zip.setProject(prj);
  zip.setDestFile(zipFile);
  FileSet fileSet = new FileSet();
  fileSet.setProject(prj);
  fileSet.setDir(srcdir);
  //fileSet.setIncludes("**/*.java"); 包括哪些文件或文件夹 eg:zip.setIncludes("*.java");
  //fileSet.setExcludes(...); 排除哪些文件或文件夹
  zip.addFileset(fileSet);
  
  zip.execute();
 }
}
测试一下
Java代码 
package net.szh.zip;  
 
public class TestZip {  
    public static void main(String[] args) {  
        ZipCompressor zc = new  ZipCompressor("E:\\szhzip.zip");  
        zc.compress("E:\\test");  
          
        ZipCompressorByAnt zca = new ZipCompressorByAnt("E:\\szhzipant.zip");  
        zca.compress("E:\\test");  
    }  
}