JarFile类学习

 

如何解析jar中的文件以及查看jar中包含的内容

package com.hb;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;

import org.junit.Test;

public class JarFileDemo {
	
	/**
	 * 遍历jar包所有的文件
	 */
	@Test
	public void getAllFilesName(){
		
		String path = "d:/hb.jar";
		try {
			File file = new File(path);
			JarFile jarFile = new JarFile(file);
			Enumeration<JarEntry> jarEntries = jarFile.entries();
			while(jarEntries.hasMoreElements()){
				JarEntry entry = jarEntries.nextElement();
				System.out.println(entry.getName());
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}
	
	/**
	 * 读取jar包中的某个文件
	 */
	@Test
	public void readFileInJar(){
		String path = "d:/hb.jar";
		try {
			File file = new File(path);
			JarFile jarFile = new JarFile(file);
			//指定文件路径的位置
//			ZipEntry zipEntry = jarFile.getEntry("AppProperty.xml");
			ZipEntry zipEntry = jarFile.getEntry("META-INF/MANIFEST.MF");
			InputStream  is = jarFile.getInputStream(zipEntry);
			BufferedReader br = new BufferedReader(new InputStreamReader(is));
			String temp = null;
			while((temp = br.readLine())!=null){
				System.out.println(temp);
			}
			
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}