Java压缩解压缩工具类

本文实例为大家分享了Java压缩解压缩工具类的具体代码，供大家参考，具体内容如下

package com.wdy.tools.utils.pressuitl;

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.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

import org.apache.commons.logging.Log;

import com.wdy.tools.utils.LogUtil;

/**
 * 压缩/解压缩工具类（zip格式）
 *
 * @author wdy
 * @date 2016-08-23
 */
public class PressUtil {

 private static final Log log = LogUtil.getLog(PressUtil.class);

 public static void main(String[] args) {
// PressUtil.ZipMultiFile("d:\\nwp_trans\\nwp_h\\", "d:\\nwp_trans\\nwp_h\\wdy.zip");
 String sourceFilePath = "d:\\nwp_trans\\nwp_h\\";
   String zipFilePath = "d:\\nwp_trans\\nwp_h\\";
   String fileName = "wdy";
   boolean flag = PressUtil.fileToZip(sourceFilePath, zipFilePath, fileName);
   if(flag){
   log.info("文件打包成功!");
   }else{
   log.info("文件打包失败!");
   }
 }

 /**
  * 将存放在sourceFilePath目录下的源文件，打包成fileName名称的zip文件，并存放到zipFilePath路径下
  * @param sourceFilePath :待压缩的文件路径
  * @param zipFilePath :压缩后存放路径
  * @param fileName :压缩后文件的名称(不包括扩展名)
  * @return
  */
 @SuppressWarnings("resource")
 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){
   log.info("待压缩的文件目录："+sourceFilePath+"不存在.");
  }else{
   try {
    File zipFile = new File(zipFilePath + "/" + fileName +".zip");
    if(zipFile.exists()){
     log.info(zipFilePath + "目录下存在名字为:" + fileName +".zip" +"打包文件.");
    }else{
     File[] sourceFiles = sourceFile.listFiles();
     if(null == sourceFiles || sourceFiles.length<1){
      log.info("待压缩的文件目录：" + sourceFilePath + "里面不存在文件，无需压缩.");
     }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++){
       //创建ZIP实体，并添加进压缩包
       ZipEntry zipEntry = new ZipEntry(sourceFiles[i].getName());
       zos.putNextEntry(zipEntry);
       //读取待压缩的文件并写进压缩包里
       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{
    //关闭流
    try {
     if(null != bis) bis.close();
     if(null != zos) zos.close();
    } catch (IOException e) {
     e.printStackTrace();
     throw new RuntimeException(e);
    }
   }
  }
  return flag;
 } 

 /**
 * 压缩单个文件
 * @param filePath 要被压缩的文件的全路径，包含文件名d:/hello.txt
 * @param zipPath 压缩后的全路径，包含文件名d:/hello.zip
 */
 public static void zipOneFile(String filePath, String zipPath) {
 try {
 File file = new File(filePath);
 File zipFile = new File(zipPath);
 InputStream input = new FileInputStream(file);
 ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(zipFile));
 zipOut.putNextEntry(new ZipEntry(file.getName()));
 int temp = 0;
 while ((temp = input.read()) != -1) {
 zipOut.write(temp);
 }
 input.close();
 zipOut.close();
 } catch (Exception e) {
 e.printStackTrace();
 }
 }
}

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