java ZipOutputStream压缩文件,ZipInputStream解压缩

java中实现zip的压缩与解压缩。java自带的能实现的功能比较有限。

本程序功能：实现简单的压缩和解压缩，压缩文件夹下的所有文件(文件过滤的话需要对File进一步细节处理)。

对中文的支持需要使用java7或java8,可以在ZipOutputStream和ZipInputStream中指定Charset参数，详见API中的构造参数。

1.压缩文件或文件夹

1 public void zip() throws IOException {
2         File fileSrc = new File("E:\abc");
3         File destFile = new File("E:\abc.zip");
4         zip(fileSrc,destFile);
5 }

1 public void zip(File fileSrc,File dectFile) throws IOException {
2         ZipOutputStream zipOutputStream = new       ZipOutputStream(new CheckedOutputStream(new FileOutputStream(dectFile),new CRC32()));
3         String name = fileSrc.getName();
4         zip(zipOutputStream, name,fileSrc);
5         zipOutputStream.flush();
6         zipOutputStream.close();
7 }

zip

 1 private void zip(ZipOutputStream zipOutputStream,String name, File fileSrc) throws IOException {
 2         if (fileSrc.isDirectory()) {
 3             File[] files = fileSrc.listFiles(new FilenameFilter() { //过滤文件
 4                 Pattern pattern = Pattern.compile(".+");//所有文件，正则表达式
 5                 @Override
 6                 public boolean accept(File dir, String name) {
 7                     return pattern.matcher(name).matches();
 8                 }
 9             });
10             zipOutputStream.putNextEntry(new ZipEntry(name+"/"));  // 建一个文件夹
11             name = name+"/";
12             for (File f : files) {
13                 zip(zipOutputStream,name+f.getName(),f);
14             }
15         }else {
16 
17             zipOutputStream.putNextEntry(new ZipEntry(name));
18             FileInputStream input = new FileInputStream(fileSrc);
19             byte[] buf = new byte[1024];
20             int len = -1;
21             while ((len = input.read(buf)) != -1) {
22                 zipOutputStream.write(buf, 0, len);
23             }
24             zipOutputStream.flush();
25             input.close();
26         }
27 }

zip

2.解压缩zip文件

1 public void unzip() throws IOException {
2         File zipFile = new File("E:\java.zip");
3         String destDir = "E:\java\";
4         unzip(zipFile,destDir);
5 }

 1 private void unzip(File zipFile, String destDir) throws IOException {
 2         ZipInputStream zipInputStream = new ZipInputStream(new CheckedInputStream(new FileInputStream(zipFile),new CRC32()));
 3         ZipEntry zipEntry;
 4         while ((zipEntry = zipInputStream.getNextEntry()) != null) {
 5             System.out.println(zipEntry.getName());
 6             File f = new File(destDir + zipEntry.getName());
 7             if(zipEntry.getName().endsWith("/")){
 8                 f.mkdirs();
 9             }else {
10 //                f.createNewFile();
11                 FileOutputStream fileOutputStream = new FileOutputStream(f);
12                 byte[] buf = new byte[1024];
13                 int len = -1;
14                 while ((len = zipInputStream.read(buf)) != -1) {  // 直到读到该条目的结尾
15                     fileOutputStream.write(buf, 0, len);
16                 }
17                 fileOutputStream.flush();
18                 fileOutputStream.close();
19             }
20             zipInputStream.closeEntry();  //关闭该条目
21         }
22         zipInputStream.close();
23 }

unzip