1 public class UnZip {
 2     private final int BUFF_SIZE = 4096;
 3     
 4     /*
 5     获取ZIP文件中的文件名和目录名
 6     */
 7     public void getEntryNames(String zipFilePath, String password){
 8         List<String> entryList = new ArrayList<String>();
 9         ZipFile zf;
10         try {
11             zf = new ZipFile(zipFilePath);
12             zf.setFileNameCharset("gbk");//默认UTF8，如果压缩包中的文件名是GBK会出现乱码
13             if(zf.isEncrypted()){
14                 zf.setPassword(password);//设置压缩密码
15             }
16             for(Object obj : zf.getFileHeaders()){
17                 FileHeader fileHeader = (FileHeader)obj;
18                 String fileName = fileHeader.getFileName();//文件名会带上层级目录信息
19                 entryList.add(fileName);
20             }
21         } catch (ZipException e) {
22             e.printStackTrace();
23         }
24         return entryList;
25     }
26 
27     /*
28     将ZIP包中的文件解压到指定目录
29     */
30     public void extract(String zipFilePath, String password, String destDir){
31         InputStream is = null;
32         OutputStream os = null;
33         ZipFile zf;
34         try {
35             zf = new ZipFile(zipFile);
36             zf.setFileNameCharset("gbk");
37             if(zf.isEncrypted()){
38                 zf.setPassword(PASSWORD);
39             }
40             
41             for(Object obj : zf.getFileHeaders()){
42                 FileHeader fileHeader = (FileHeader)obj;
43                 String destFile = destDir + "/" + fileHeader.getFileName();
44                 if(!destFile.getParentFile().exists()){
45                     destFile.getParentFile().mkdirs();//创建目录
46                 }
47                 is = zf.getInputStream(fileHeader);
48                 os = new FileOutputStream(destFile);
49                 int readLen = -1;
50                 byte[] buff = new byte[BUFF_SIZE];
51                 while ((readLen = is.read(buff)) != -1) {
52                     os.write(buff, 0, readLen);
53                 }
54             }
55         }catch(Exception e){
56             e.printStackTrace();
57         }finally{
58             //关闭资源
59             try{
60                 if(is != null){
61                     is.close();
62                 }
63             }catch(IOException ioe){}
64             
65             try{
66                 if(os != null){
67                     os.close();
68                 }
69             }catch(IOException ioe){}
70         }
71     }
72 }