java 压缩文件

package folder;

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.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class Zip {

/**
*
* create by szw
*
* */

public static void main(String[] args) throws IOException {
// 定义要压缩的文件 也就是说在D盘里有个 demo.txt 的文件(必须要有,否者会有异常,实际应用中可判断);
File file = new File("d:" + File.separator + "demo.txt");//定义压缩文件的名称
File zipFile= new File("d:" + File.separator + "demo.zip");//定义输入文件流
InputStream input = new FileInputStream(file);//定义压缩输出流
ZipOutputStream zipOut =null;//实例化压缩输出流,并制定压缩文件的输出路径 就是D盘下,名字叫 demo.zip
zipOut = new ZipOutputStream(new FileOutputStream(zipFile));
zipOut.putNextEntry(new ZipEntry(file.getName()));//设置注释

int temp = 0;
while((temp = input.read()) != -1)
{
zipOut.write(temp);
}
input.close();
zipOut.close();
}
}