[Unzip File] #FileIO

unzip.java

package com.superzjn;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class UnZip {

    public File newFile(File destinationDir, ZipEntry zipEntry) throws IOException {
        File destFile = new File(destinationDir, zipEntry.getName());

        String destDirPath = destinationDir.getCanonicalPath();
        String destFilePath = destFile.getCanonicalPath();

        if (!destFilePath.startsWith(destDirPath + File.separator)) {
            throw new IOException("Entry is outside of the target dir: " + zipEntry.getName());
        }

        return destFile;
    }

    public void unzipFile(String path) throws IOException {

        byte[] buffer = new byte[2048];

        // File destDir = new
        // File("/home/superzjn/Documents/Java_Test/jsontest/target/classes/com/superzjn/unzipTest");
        File destDir = new File("jsontest/target/classes/com/superzjn/unzipTest");

        try (FileInputStream fis = new FileInputStream(path);
                BufferedInputStream bis = new BufferedInputStream(fis);
                ZipInputStream zipInputStream = new ZipInputStream(bis)) {

            ZipEntry entry;

            while ((entry = zipInputStream.getNextEntry()) != null) {

                File newFile = newFile(destDir, entry);

                if (entry.isDirectory()) {
                    if (!newFile.isDirectory() && !newFile.mkdirs()) {
                        throw new IOException("Failed to create dir " + newFile);
                    }
                } else {
                    // fix for Windows-created archives
                    File parent = newFile.getParentFile();
                    if (!parent.isDirectory() && !parent.mkdirs()) {
                        throw new IOException("Failed to create directory " + parent);
                    }

                    // write file content
                    try (FileOutputStream fos = new FileOutputStream(newFile)) {
                        int len;
                        while ((len = zipInputStream.read(buffer)) > 0) {
                            fos.write(buffer, 0, len);
                        }
                    }
                }
            }
        }
    }

    public static void main(String[] args) {
        URL file = UnZip.class.getResource("package.zip");
        UnZip unZip = new UnZip();
        try {
            unZip.unzipFile(file.getPath());
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}