Java如何实现压缩文件与解压缩zip文件

package com.kuang.zip;

import org.apache.commons.io.IOUtils;

import java.io.*;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class testZip {


    public static void unZipIt(String file, String outputFolder) throws IOException {

        ZipFile zipFile = null;
        InputStream in=null;
        OutputStream out=null;
        try {
            zipFile = new ZipFile(file);
            Enumeration <? extends ZipEntry>  entries = zipFile.entries();
            while (entries.hasMoreElements()) {
                ZipEntry entry = entries.nextElement();
                File entryDestination = new File(outputFolder, entry.getName());
                if (entry.isDirectory()) {
                    entryDestination.mkdirs();
                } else {
                    entryDestination.getParentFile().mkdirs();
                    try {
                        out = new FileOutputStream(entryDestination);
                        in = zipFile.getInputStream(entry);
                        IOUtils.copy(in, out);
                    } catch (IOException e) {
                        throw e;
                    }finally {
                        IOUtils.closeQuietly(in);
                        IOUtils.closeQuietly(out);
                    }
                }
            }
        } finally {
            try {
                if(zipFile!=null){zipFile.close();zipFile=null;}
            } catch (IOException e) {
            }
        }
    }

    public static void main(String[] args) throws Exception {

        unZipIt("D:\\Test\\TestbyYTT.zip","D:\\Test\\");

    }

}

<!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.4</version>
</dependency>

public static void readAll() {
    try (
        FileReader fileReader = new FileReader("test");
        BufferedReader bufferedReader = new BufferedReader(fileReader)
    ) {
        String line;

        while ((line = bufferedReader.readLine()) != null) {
            System.out.println(line);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

package com.kuang.zip;

import java.io.*;
import java.util.zip.*;
import java.util.zip.ZipEntry;


public class FileZip {
    /**
     * zip文件压缩
     * @param inputFile 待压缩文件夹/文件名
     * @param outputFile 生成的压缩包名字
     */

    public static void ZipCompress(String inputFile, String outputFile) throws Exception {
        //创建zip输出流
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outputFile));
        //创建缓冲输出流
        BufferedOutputStream bos = new BufferedOutputStream(out);
        File input = new File(inputFile);
        compress(out, bos, input,null);
        bos.close();
        out.close();
    }
    /**
     * @param name 压缩文件名，可以写为null保持默认
     */
    //递归压缩
    public static void compress(ZipOutputStream out, BufferedOutputStream bos, File input, String name) throws IOException {
        if (name == null) {
            name = input.getName();
        }
        //如果路径为目录（文件夹）
        if (input.isDirectory()) {
            //取出文件夹中的文件（或子文件夹）
            File[] flist = input.listFiles();

            if (flist.length == 0)//如果文件夹为空，则只需在目的地zip文件中写入一个目录进入
            {
                out.putNextEntry(new ZipEntry(name + "/"));
            } else//如果文件夹不为空，则递归调用compress，文件夹中的每一个文件（或文件夹）进行压缩
            {
                for (int i = 0; i < flist.length; i++) {
                    compress(out, bos, flist[i], name + "/" + flist[i].getName());
                }
            }
        } else//如果不是目录（文件夹），即为文件，则先写入目录进入点，之后将文件写入zip文件中
        {
            out.putNextEntry(new ZipEntry(name));
            FileInputStream fos = new FileInputStream(input);
            BufferedInputStream bis = new BufferedInputStream(fos);
            int len=-1;
            //将源文件写入到zip文件中
            byte[] buf = new byte[1024];
            while ((len = bis.read(buf)) != -1) {
                bos.write(buf,0,len);
            }
            bis.close();
            fos.close();
        }
    }

    /**
     * zip解压
     * @param inputFile 待解压文件名
     * @param destDirPath  解压路径
     */

    public static void ZipUncompress(String inputFile,String destDirPath) throws Exception {
        File srcFile = new File(inputFile);//获取当前压缩文件
        // 判断源文件是否存在
        if (!srcFile.exists()) {
            throw new Exception(srcFile.getPath() + "所指文件不存在");
        }
        //开始解压
        //构建解压输入流
        ZipInputStream zIn = new ZipInputStream(new FileInputStream(srcFile));
        ZipEntry entry = null;
        File file = null;
        while ((entry = zIn.getNextEntry()) != null) {
            if (!entry.isDirectory()) {
                file = new File(destDirPath, entry.getName());
                if (!file.exists()) {
                    new File(file.getParent()).mkdirs();//创建此文件的上级目录
                }
                OutputStream out = new FileOutputStream(file);
                BufferedOutputStream bos = new BufferedOutputStream(out);
                int len = -1;
                byte[] buf = new byte[1024];
                while ((len = zIn.read(buf)) != -1) {
                    bos.write(buf, 0, len);
                }
                // 关流顺序，先打开的后关闭
                bos.close();
                out.close();
            }
        }
    }


    public static void main(String[] args) {
        try {

            ZipCompress("D:\\Test", "D:\\Test\\TestbyYTT.zip");
            ZipUncompress("D:\\Test\\TestbyYTT.zip","D:\\Test\\TestbyYTT的解压文件");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}