java实现多个文件压缩成压缩包

本文实例为大家分享了java实现多个文件压缩的具体代码，供大家参考，具体内容如下

需要用到的ant.jar

package util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

public class ZipTools { 

  public static final String ZIP_FILENAME = ""; //需要解压缩的文件名
  public static final String ZIP_DIR = "";  //需要压缩的文件夹
  public static final String UN_ZIP_DIR = "";  //要解压的文件目录
  public static final int BUFFER = 1024 ;  //缓存大小 

public static void zipFile(String baseDir,String fileName) throws Exception{
    List fileList=getSubFiles(new File(baseDir));
    ZipOutputStream zos=new ZipOutputStream(new FileOutputStream(fileName));
    ZipEntry ze=null;
    byte[] buf=new byte[BUFFER];
    int readLen=0;
    for(int i = 0; i <fileList.size(); i++) {
      File f=(File)fileList.get(i);
      ze=new ZipEntry(getAbsFileName(baseDir, f));
      ze.setSize(f.length());
      ze.setTime(f.lastModified());
      zos.putNextEntry(ze);
      InputStream is=new BufferedInputStream(new FileInputStream(f));
      while ((readLen=is.read(buf, 0, BUFFER))!=-1) {
        zos.write(buf, 0, readLen);
      }
      is.close();
    }
    zos.close();
  } 

private static String getAbsFileName(String baseDir, File realFileName){
    File real=realFileName;
    File base=new File(baseDir);
    String ret=real.getName();
    while (true) {
      real=real.getParentFile();
      if(real==null)
        break;
      if(real.equals(base))
        break;
      else
        ret=real.getName()+"/"+ret;
    }
    return ret;
  } 

private static List getSubFiles(File baseDir){
    List ret=new ArrayList();
    File[] tmp=baseDir.listFiles();
    for (int i = 0; i <tmp.length; i++) {
      if(tmp[i].isFile())
        ret.add(tmp[i]);
      if(tmp[i].isDirectory())
        ret.addAll(getSubFiles(tmp[i]));
    }
    return ret;
  } 

public static void upZipFile() throws Exception{
    ZipFile zfile=new ZipFile(ZIP_FILENAME);
    Enumeration zList=zfile.entries();
    ZipEntry ze=null;
    byte[] buf=new byte[1024];
    while(zList.hasMoreElements()){
      ze=(ZipEntry)zList.nextElement();
      if(ze.isDirectory()){
        File f=new File(ZIP_DIR+ze.getName());
        f.mkdir();
        continue;
      }
      OutputStream os=new BufferedOutputStream(new FileOutputStream(getRealFileName(ZIP_DIR, ze.getName())));
      InputStream is=new BufferedInputStream(zfile.getInputStream(ze));
      int readLen=0;
      while ((readLen=is.read(buf, 0, 1024))!=-1) {
        os.write(buf, 0, readLen);
      }
      is.close();
      os.close();
    }
    zfile.close();
  } 

public static File getRealFileName(String baseDir, String absFileName){
    String[] dirs=absFileName.split("/");
    File ret=new File(baseDir);
    if(dirs.length>1){
      for (int i = 0; i < dirs.length-1;i++) {
        ret=new File(ret, dirs[i]);
      }
      if(!ret.exists())
        ret.mkdirs();
      ret=new File(ret, dirs[dirs.length-1]);
      return ret;
    }
    return ret;
  } 

public static void deleteDirFile(String path){
   File file=new File(path);
   if(file.isDirectory()){    //如果是目录，先递归删除
     String[] list=file.list();
     for(int i=0;i<list.length;i++){
     deleteDirFile(path+"\\"+list[i]); //先删除目录下的文件
     }
   }
   file.delete();
 }

public static String newFolder(String dir){
 java.io.File myFilePath=new java.io.File(dir);
 if(myFilePath.isDirectory()){}else{
  myFilePath.mkdirs();
 }
 return dir;
 }

public static String getFileNames(String path){  

    File file = new File(path);      // get file list where the path has
    File[] array = file.listFiles();     // 获得文件列表
    String pdfNames="";

    for(int i=0;i<array.length;i++){
      if(array[i].isFile()){
        if(array[i].getName().endsWith(".pdf")){  //获得pdf文件名称
         pdfNames+=array[i].getName().substring(0,array[i].getName().length()-4)+",";
        }
      }
    }
    if(pdfNames.length()>0){
     pdfNames.substring(0,pdfNames.length()-1);
    }
    return pdfNames;
  }

public static void copyFile(String oldPath, String newPath) {
    try {
      int bytesum = 0;
      int byteread = 0;
      File oldfile = new File(oldPath);
      if (oldfile.exists()) {     //文件存在时
        InputStream inStream = new FileInputStream(oldPath); //读入原文件
        FileOutputStream fs = new FileOutputStream(newPath);
        byte[] buffer = new byte[1444];
        while ( (byteread = inStream.read(buffer)) != -1) {
          bytesum += byteread;    //字节数文件大小
          fs.write(buffer, 0, byteread);
        }
        inStream.close();
      }
    }
    catch (Exception e) {
      System.out.println("copy file error!");
      e.printStackTrace();
    }
  }

public static boolean fileExist(String fileNames,String pdfName){
 boolean flag=false;
 if(!"".equals(fileNames)){
  String[] nameArr=fileNames.split(",");
  for(int i=0;i<nameArr.length;i++){
  if(pdfName.equals(nameArr[i])){    //如果文件名相同则执行拷贝操作(拷贝到zip目录准备打包)
   flag=true;
   break;
  }
  }
 }
 return flag;
 }

public static void deleteFileAndDir(String path){
  File file = new File(path);
     File[] array = file.listFiles();
     for(int i=0;i<array.length;i++){
       if(array[i].isFile()){
         array[i].delete();
       }else if(array[i].isDirectory()){
       deleteDirFile(array[i].getPath());
       }
     }
 }

}

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