欢迎来到Java Unzip 文件示例. 在上一篇文章中,我们学到了(/community/tutorials/java-zip-file-folder-example),在这里我们将从目录中创建的相同的 zip 文件解密到另一个输出目录。
Java Unzip 檔案
要解密一个Zip文件,我们需要用ZipInputStream读取Zip文件,然后读取所有ZipEntry一个接一个,然后使用FileOutputStream将其写入文件系统,我们还需要创建输出目录,如果它不存在,以及任何嵌入式目录在Zip文件中。
1package com.journaldev.files;
2
3import java.io.File;
4import java.io.FileInputStream;
5import java.io.FileOutputStream;
6import java.io.IOException;
7import java.util.zip.ZipEntry;
8import java.util.zip.ZipInputStream;
9
10public class UnzipFiles {
11
12 public static void main(String[] args) {
13 String zipFilePath = "/Users/pankaj/tmp.zip";
14
15 String destDir = "/Users/pankaj/output";
16
17 unzip(zipFilePath, destDir);
18 }
19
20 private static void unzip(String zipFilePath, String destDir) {
21 File dir = new File(destDir);
22 // create output directory if it doesn't exist
23 if(!dir.exists()) dir.mkdirs();
24 FileInputStream fis;
25 //buffer for read and write data to file
26 byte[] buffer = new byte[1024];
27 try {
28 fis = new FileInputStream(zipFilePath);
29 ZipInputStream zis = new ZipInputStream(fis);
30 ZipEntry ze = zis.getNextEntry();
31 while(ze != null){
32 String fileName = ze.getName();
33 File newFile = new File(destDir + File.separator + fileName);
34 System.out.println("Unzipping to "+newFile.getAbsolutePath());
35 //create directories for sub directories in zip
36 new File(newFile.getParent()).mkdirs();
37 FileOutputStream fos = new FileOutputStream(newFile);
38 int len;
39 while ((len = zis.read(buffer)) > 0) {
40 fos.write(buffer, 0, len);
41 }
42 fos.close();
43 //close this ZipEntry
44 zis.closeEntry();
45 ze = zis.getNextEntry();
46 }
47 //close last ZipEntry
48 zis.closeEntry();
49 zis.close();
50 fis.close();
51 } catch (IOException e) {
52 e.printStackTrace();
53 }
54
55 }
56
57}
一旦程序完成,我们在输出文件夹中有所有的zip文件内容,具有相同的目录等级。
1Unzipping to /Users/pankaj/output/.DS_Store
2Unzipping to /Users/pankaj/output/data/data.dat
3Unzipping to /Users/pankaj/output/data/data.xml
4Unzipping to /Users/pankaj/output/data/xmls/project.xml
5Unzipping to /Users/pankaj/output/data/xmls/web.xml
6Unzipping to /Users/pankaj/output/data.Xml
7Unzipping to /Users/pankaj/output/DB.xml
8Unzipping to /Users/pankaj/output/item.XML
9Unzipping to /Users/pankaj/output/item.xsd
10Unzipping to /Users/pankaj/output/ms/data.txt
11Unzipping to /Users/pankaj/output/ms/project.doc
这是关于 java unzip 文件的例子。