Java—解压zip文件

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;

public class UnZip{

    private static final int buffer = 10240;//10M 
    
    /**
     * 将zip文件解压为文件夹
     * @param path zip文件路径
     * @return
     */
    public static String unZip(String path) {
        int count = -1;
        String targetPath = "";

        File file = null;
        InputStream is = null;
        FileOutputStream fos = null;
        BufferedOutputStream bos = null;

        targetPath = path.substring(0, path.lastIndexOf(".")) + File.separator; // 保存解压文件目录
        if(!new File(targetPath).exists()){
            new File(targetPath).mkdir(); // 创建保存目录
        }
        ZipFile zipFile = null;
        try {
            zipFile = new ZipFile(path, "gbk"); // 解决中文乱码问题
            Enumeration<?> entries = zipFile.getEntries();
            while (entries.hasMoreElements()) {
                byte buf[] = new byte[buffer];
                ZipEntry entry = (ZipEntry) entries.nextElement();
                String filename = entry.getName();
                boolean ismkdir = false;
                if (filename.lastIndexOf("/") != -1) { // 检查此文件是否带文件夹
                    ismkdir = true;
                }
                filename = targetPath + filename;
                if (entry.isDirectory()) { // 如果是文件夹先创建
                    file = new File(filename);
                    file.mkdirs();
                    continue;
                }
                file = new File(filename);
                if (!file.exists()) { // 如果是目录先创建
                    if (ismkdir) {
                        new File(filename.substring(0, filename.lastIndexOf("/"))).mkdirs(); // 目录先创建
                    }
                }
                file.createNewFile(); // 创建文件
                is = zipFile.getInputStream(entry);
                fos = new FileOutputStream(file);
                bos = new BufferedOutputStream(fos, buffer);
                while ((count = is.read(buf)) > -1) {
                    bos.write(buf, 0, count);
                }
                bos.flush();
                bos.close();
                fos.close();
                is.close();
            }
            zipFile.close();
            return targetPath;
        } catch (IOException ioe) {
            ioe.printStackTrace();
        } finally {
            try {
                if (bos != null) {
                    bos.close();
                }
                if (fos != null) {
                    fos.close();
                }
                if (is != null) {
                    is.close();
                }
                if (zipFile != null) {
                    zipFile.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return "";
    }
    
    public static void main(String[] args) {
        String filePath = "C:\\Users\\hwt\\Desktop\\6816.zip";
        System.out.println(unZip(filePath));
    }
}