java应用压缩、解压zip文件

导入java.util.zip.*数据包，

<span style="font-size:14px;">public class Zip{       private ZipInputStream  zipIn;      //解压Zip       private ZipOutputStream zipOut;     //压缩Zip       private ZipEntry        zipEntry;       private static int      bufSize;    //size of bytes       private byte[]          buf;       private int             readedBytes;              public Zip(){           this(512);       }         public Zip(int bufSize){           this.bufSize = bufSize;           this.buf = new byte[this.bufSize];       }              //压缩文件夹内的文件       public void doZip(String zipDirectory){//zipDirectoryPath:需要压缩的文件夹名           File file;           File zipDir;             zipDir = new File(zipDirectory);           String zipFileName = zipDirectory + ".zip";//压缩后生成的zip文件名             try{               this.zipOut = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFileName)));               handleDir(zipDir , this.zipOut);               this.zipOut.close();           }catch(Exception ioe){               ioe.printStackTrace();           }       }         //由doZip调用,递归完成目录文件读取      private void handleDir(File dir , ZipOutputStream zipOut)throws Exception{           FileInputStream fileIn;           File[] files;             files = dir.listFiles();           if(files.length == 0){//如果目录为空,则单独创建之.               //ZipEntry的isDirectory()方法中,目录以"/"结尾.               this.zipOut.putNextEntry(new ZipEntry(dir.toString() + "/"));               this.zipOut.closeEntry();           }           else{//如果目录不为空,则分别处理目录和文件.               for(File fileName : files){                     if(fileName.isDirectory()){                       handleDir(fileName , this.zipOut);                   }                   else{                       fileIn = new FileInputStream(fileName);                      String name=dir.getName();                      //生成的压缩包存放在原目录下                      this.zipOut.putNextEntry(new ZipEntry(name+"/"+fileName.getName().toString()));                                            //此方法存放在该项目目录下                      //this.zipOut.putNextEntry(new ZipEntry(fileName.toString()));                      while((this.readedBytes=fileIn.read(this.buf))>0){                          this.zipOut.write(this.buf , 0 , this.readedBytes);                      }                      this.zipOut.closeEntry();                   }               }           }       }         //解压指定zip文件       public void unZip(String unZipfileName,String savedir){//unZipfileName需要解压的zip文件名           FileOutputStream fileOut;         File zipfile=new File(unZipfileName);        File file;           String zipName=zipfile.getName();        String f=zipName.substring(0, zipName.length()-4);          File ff=new File(savedir+"/"+f);          try{               this.zipIn = new ZipInputStream (new                       BufferedInputStream(new FileInputStream(unZipfileName)));               while((this.zipEntry = this.zipIn.getNextEntry()) != null){                   file = new File(ff+"\\"+this.zipEntry.getName());                  System.out.println("zip:"+this.zipEntry.getName());                if(this.zipEntry.isDirectory()){               //     file.mkdirs();                    System.out.println(file.getAbsolutePath());                    File dir=new File(ff+"\\"+this.zipEntry.getName());                    System.out.println("dir "+dir.getAbsolutePath());                }                   else{                       //如果指定文件的目录不存在,则创建之.                       File parent = file.getParentFile();                       System.out.println("parent:"+parent +" "+file);                                        if(parent!=null){                    if(!parent.exists()){                           parent.mkdirs();                          System.out.println("parentpath "+parent.getAbsolutePath());                    }                       }                    if(!ff.exists()){                          ff.mkdir();                      }             //         System.out.println(ff+"\\"+file.getName());                    fileOut = new FileOutputStream(file);                                             //fileOut = new FileOutputStream(file); 此方法存放到该项目目录下                      while(( this.readedBytes = this.zipIn.read(this.buf) ) > 0){                           fileOut.write(this.buf , 0 , this.readedBytes );                       }                       fileOut.close();                   }                                    this.zipIn.closeEntry();              }          }catch(Exception ioe){              ioe.printStackTrace();           }      }         //设置缓冲区大小       public void setBufSize(int bufSize){           this.bufSize = bufSize;       }         //测试Zip类       public static void main(String[] args)throws Exception{           Zip zip=new Zip();          zip.unZip("E:\\page\\baidu.zip","C:\\Users\\lmy\\Desktop");      }   </span>