简单实现压缩与解压ZIP文件

压缩方法compression与zip方法：

private static void compression(String zipFileName,File targetFile){
		System.out.println("正在压缩中......");
		try {
			//要生成的压缩文件
			ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
			BufferedOutputStream bos = new BufferedOutputStream(out);
			zip(out,targetFile,targetFile.getName(),bos);
			bos.close();
			out.close();
			
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		System.out.println("压缩完成");
	}
	//zip
	private static void zip(ZipOutputStream zOut, File targetFile, String name, BufferedOutputStream bos) throws IOException {
		//如果是个目录
		if(targetFile.isDirectory()){
			File[] files = targetFile.listFiles();
			if(files.length==0){ //空文件夹
				zOut.putNextEntry(new ZipEntry(name+"/")); //处理空目录
			}
			for(File f: files){
				//递归处理
				zip(zOut,f,name+"/"+f.getName(),bos);
			}
		}else{
			zOut.putNextEntry(new ZipEntry(name));
			InputStream in = new FileInputStream(targetFile);
			BufferedInputStream bis = new BufferedInputStream(in);
			byte[] bytes = new byte[1024];
			int len = -1;
			while((len=bis.read(bytes))!=-1){
				bos.write(bytes,0,len);
			}
			bis.close();
		}
	}

解压方法：

private static void decompression(String targetFileName,String parent){
		try {
			//构造解压的输入流
			ZipInputStream zIn = new ZipInputStream(new FileInputStream(targetFileName));
			ZipEntry entry = null;
			File file = null;
			while((entry = zIn.getNextEntry())!=null && !entry.isDirectory()){
				file = new File(parent,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);
				byte[] bytes = new byte[1024];
				int len = -1;
				while((len=zIn.read(bytes))!=-1){
					bos.write(bytes, 0, len);
				}
				bos.close();
				System.out.println(file.getAbsolutePath()+" 解压成功");
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

main主方法：

public static void main(String[] args) {
		//zipFileName 压缩后文件路径  pathname  需要压缩的文件路径
		compression("D:\\test.zip",new File("D:\\testJava\\tt"));
		//targetFileName 解压目标文件  parent 解压后文件路径
		//decompression("D:\\test.zip","D:\\");
	}

完整代码：

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

/**
 * 文件压缩与解压缩
 */
public class CompressionAndDecompressionDemo {
	/**
	 * 压缩
	 */
	private static void compression(String zipFileName,File targetFile){
		System.out.println("正在压缩中......");
		try {
			//要生成的压缩文件
			ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
			BufferedOutputStream bos = new BufferedOutputStream(out);
			zip(out,targetFile,targetFile.getName(),bos);
			bos.close();
			out.close();
			
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		System.out.println("压缩完成");
	}
	//zip
	private static void zip(ZipOutputStream zOut, File targetFile, String name, BufferedOutputStream bos) throws IOException {
		//如果是个目录
		if(targetFile.isDirectory()){
			File[] files = targetFile.listFiles();
			if(files.length==0){ //空文件夹
				zOut.putNextEntry(new ZipEntry(name+"/")); //处理空目录
			}
			for(File f: files){
				//递归处理
				zip(zOut,f,name+"/"+f.getName(),bos);
			}
		}else{
			zOut.putNextEntry(new ZipEntry(name));
			InputStream in = new FileInputStream(targetFile);
			BufferedInputStream bis = new BufferedInputStream(in);
			byte[] bytes = new byte[1024];
			int len = -1;
			while((len=bis.read(bytes))!=-1){
				bos.write(bytes,0,len);
			}
			bis.close();
		}
	}

	/**
	 * 解压
	 */
	private static void decompression(String targetFileName,String parent){
		try {
			//构造解压的输入流
			ZipInputStream zIn = new ZipInputStream(new FileInputStream(targetFileName));
			ZipEntry entry = null;
			File file = null;
			while((entry = zIn.getNextEntry())!=null && !entry.isDirectory()){
				file = new File(parent,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);
				byte[] bytes = new byte[1024];
				int len = -1;
				while((len=zIn.read(bytes))!=-1){
					bos.write(bytes, 0, len);
				}
				bos.close();
				System.out.println(file.getAbsolutePath()+" 解压成功");
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public static void main(String[] args) {
		//zipFileName 压缩后文件路径  pathname  需要压缩的文件路径
		//compression("D:\\test.zip",new File("D:\\testJava\\tt"));
		//targetFileName 解压目标文件  parent 解压后文件路径
		decompression("D:\\test.zip","D:\\");
	}

}