Java JarFile 解析

package com.github.binarylei;

import java.io.*;

import java.net.URL;

import java.net.URLDecoder;

import java.util.ArrayList;

import java.util.Enumeration;

import java.util.List;

import java.util.jar.JarEntry;

import java.util.jar.JarFile;

/**

 * @author: leigang

 * @version: 2018-06-11

 */

public class JarFileUtils {

    // 获取 clazz 所在 jar 包路径

    public static String getJarPath(Class clazz) {

        String filePath = null;

        URL url = clazz.getProtectionDomain().getCodeSource().getLocation();

        try {

            // 转化为utf-8编码，支持中文

            filePath = URLDecoder.decode(url.getPath(), "utf-8");

        } catch (Exception e) {

            e.printStackTrace();

        }

        File file = new File(filePath);

        filePath = file.getAbsolutePath();  //得到windows下的正确路径

        return filePath;

    }

    // 获取 clazz 所在 jar 包目录

    public static String getJarDir(Class clazz) {

        String jarPath = getJarPath(clazz);

        if (jarPath.endsWith(".jar")) {    // 可执行jar包运行的结果里包含".jar"

            // 获取jar包所在目录

            jarPath = jarPath.substring(0, jarPath.lastIndexOf("/") + 1);

        }

        return jarPath;

    }

    // 遍历 jar 包中的所有文件

    public static List<String> listJarFile(String path) throws IOException {

        JarFile jarFile = new JarFile(path);

        Enumeration<JarEntry> entries = jarFile.entries();

        ArrayList<String> files = new ArrayList<>();

        while (entries.hasMoreElements()) {

            JarEntry jarEntry = entries.nextElement();

            if (!jarEntry.isDirectory()) {

                files.add("jar:file:/" + path + "!/" + jarEntry.getName());

            }

        }

        return files;

    }

    // 遍历指定 jar 包目录中的文件

    public static List<String> listJarFile(String path, String dir) throws IOException {

        if (!dir.endsWith("/")) {

            dir += "/";

        }

        JarFile jarFile = new JarFile(path);

        Enumeration<JarEntry> entries = jarFile.entries();

        ArrayList<String> files = new ArrayList<>();

        while (entries.hasMoreElements()) {

            JarEntry jarEntry = entries.nextElement();

            String filename = jarEntry.getName();

            if (!jarEntry.isDirectory() && filename.startsWith(dir)) {

                files.add("jar:file:/" + path + "!/" + filename);

            }

        }

        return files;

    }

    // jar:file:/F:/test-1.0.0.jar!/dir/test.properties

    public static void read(String jarFilePath) {

        InputStream in = null;

        try {

            in =  new URL(jarFilePath).openStream();

            BufferedReader br = new BufferedReader(new InputStreamReader(in));

            String s="";

            while((s=br.readLine()) != null)

                System.out.println(s);

        } catch (IOException e) {

            e.printStackTrace();

        } finally {

            if (in != null) {

                try {

                    in.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

    }

}
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Java JarFile 解析

Java JarFile 解析

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