HelloWorld/test at master · 15575432921/HelloWorld · GitHub

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package test;

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

public class Solution {
    private static final int BUFFER_SIZE=4096;
    public static void unZip(File srcFile, String destDirPath) throws RuntimeException {
        long start = System.currentTimeMillis();

        // 判断源文件是否存在

        if (!srcFile.exists()) {
            throw new RuntimeException(srcFile.getPath() + "所指文件不存在");

        }

        // 开始解压

        ZipFile zipFile = null;

        try {
            zipFile = new ZipFile(srcFile);

            Enumeration<?> entries = zipFile.entries();

            while (entries.hasMoreElements()) {
                ZipEntry entry = (ZipEntry) entries.nextElement();

                System.out.println("解压" + entry.getName());

                // 如果是文件夹，就创建个文件夹

                if (entry.isDirectory()) {
                    String dirPath = destDirPath + "/" + entry.getName();

                    File dir = new File(dirPath);

                    dir.mkdirs();

                } else {
                    // 如果是文件，就先创建一个文件，然后用io流把内容copy过去

                    File targetFile = new File(destDirPath + "/" + entry.getName());

                    // 保证这个文件的父文件夹必须要存在

                    if(!targetFile.getParentFile().exists()){
                        targetFile.getParentFile().mkdirs();

                    }

                    targetFile.createNewFile();

                    // 将压缩文件内容写入到这个文件中

                    InputStream is = zipFile.getInputStream(entry);

                    FileOutputStream fos = new FileOutputStream(targetFile);

                    int len;

                    byte[] buf = new byte[BUFFER_SIZE];

                    while ((len = is.read(buf)) != -1) {
                        fos.write(buf, 0, len);

                    }

                    // 关流顺序，先打开的后关闭

                    fos.close();

                    is.close();

                }

            }

            long end = System.currentTimeMillis();

            System.out.println("解压完成，耗时：" + (end - start) +" ms");

        } catch (Exception e) {
            throw new RuntimeException("unzip error from ZipUtils", e);

        } finally {
            if(zipFile != null){
                try {
                    zipFile.close();

                } catch (IOException e) {
                    e.printStackTrace();

                }

            }

        }

    }

    public static void main(String[] args) {
        File file=new File("C:\\Users\\ZSl\\Desktop\\test.zip");
        String s="C:\\Users\\ZSl\\Desktop\\unzip";
        unZip(file,s);
    }
}