通过java api实现解压缩zip示例

  • Z时代
  • 2024-01-10
  • 分类：IT

通过java api实现zip压缩格式的压缩与解压缩

代码如下:
package com.hongyuan.test;

import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.Enumeration;import java.util.zip.ZipEntry;import java.util.zip.ZipFile;import java.util.zip.ZipOutputStream;

public class ZipTest {

 public static void main(String[] args) throws IOException {  unZip("bootstrap.zip");  zip("bootstrap_01.zip","bootstrap/css/bootstrap.css","bootstrap/css/bootstrap.min.css"); } public static void unZip(String fileName) throws IOException{  //获取压缩文件对象  ZipFile zf = new ZipFile(fileName);  //遍历文件条目  Enumeration<? extends ZipEntry> items = zf.entries();  while (items.hasMoreElements()) {   ZipEntry item = items.nextElement();   String filePath = zf.getName().substring(0,     zf.getName().lastIndexOf("."))     + File.separator + item.getName();   File fileDir = new File(filePath.substring(0,     filePath.lastIndexOf("/")));   if (!fileDir.exists()) {    fileDir.mkdirs();   }   //从流中读取文件   OutputStream out = new FileOutputStream(filePath);   InputStream in = zf.getInputStream(item);   byte[] temp = new byte[1024];   int len = 0;   while ((len = in.read(temp)) > 0) {    out.write(temp, 0, len);   }   in.close();   out.close();  }  zf.close(); }

 public static void zip(String fileName,String... files) throws IOException{  //构造压缩文件输出流  ZipOutputStream zos=new ZipOutputStream(new FileOutputStream(fileName));  for(int i=0,size=files.length;i<size;i++){   //创建压缩实体   ZipEntry entry=new ZipEntry(files[i].substring(files[i].lastIndexOf("/")+1));   zos.putNextEntry(entry);   //将文件内容输出到压缩流中   InputStream is=new FileInputStream(files[i]);   int count=0;   byte[] buffer=new byte[1024];   while((count=is.read(buffer))>=0){    zos.write(buffer, 0, count);   }   zos.flush();   zos.closeEntry();   is.close();  } }}

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