java如何在项目依赖的jar包中查找冲突的类

迷南。 2022-08-21 14:57 234阅读 0赞

原文：[java如何在项目依赖的jar包中查找冲突的类][java_jar]

源代码下载地址：[http://www.zuidaima.com/share/1785617759915008.htm][java_jar]

package com.whaty.util;
    
    import java.util.*;
    import java.io.*;
    
    public class JarClassFind {
    	public static int count = 0;
    
    	static public void main(String[] args) {
    		/*
    		 * if (args.length < 2) { showHowToUsage(); return; }
    		 */
    		String className = "StringUtil"; // 要查询的class,要带包名的类名
    		String libPath = "E:\\work\\workspace\\jngl_mysql\\WebRoot\\WEB-INF\\lib\\"; // 所要查找的JAR包的目录
    
    		String absoluteclassname = className.replace('.', '/') + ".class";
    
    		System.out.println("Find class [" + className + "] in Path [" + libPath + "] Results:");
    		FindClassInLocalSystem(libPath, absoluteclassname);
    		if (JarClassFind.count == 0) {
    			System.out.println("Error:Can't Find Such Jar File!");
    		}
    		System.out.println("Find Process Ended! Total Results:" + JarClassFind.count);
    	}
    
    	private static void FindClassInLocalSystem(String path, String classname) {
    		if (path.charAt(path.length() - 1) != '\\') {
    			path += '\\';
    		}
    		File file = new File(path);
    		if (!file.exists()) {
    			System.out.println("Error: Path not Existed! Please Check it out!");
    			return;
    		}
    		String[] filelist = file.list();
    		for (int i = 0; i < filelist.length; i++) {
    			File temp = new File(path + filelist[i]);
    			if ((temp.isDirectory() && !temp.isHidden() && temp.exists())) {
    				FindClassInLocalSystem(path + filelist[i], classname);
    			} else {
    				if (filelist[i].endsWith("jar")) {
    					try {
    						java.util.jar.JarFile jarfile = new java.util.jar.JarFile(path + filelist[i]);
    						for (Enumeration e = jarfile.entries(); e.hasMoreElements();) {
    							String name = e.nextElement().toString();
    							if (name.equals(classname) || name.indexOf(classname) > -1) {
    								System.out.println("No." + ++JarClassFind.count);
    								System.out.println("Jar Package:" + path + filelist[i]);
    								System.out.println(name);
    							}
    						}
    					} catch (Exception eee) {
    					}
    				}
    			}
    		}
    	}
    
    	public static void showHowToUsage() {
    		System.out.println("Usage: Java -cp. JarClassFind <source path> <source class name>");
    		System.out.println("Usage: Java -classpath. JarClassFind <source path> <source class name>");
    		System.out.println("");
    		System.out.println("<source path>:\t\tPath to Find eg:D:\\Jbuilder");
    		System.out.println("<source class name>:\tClass to Find eg:java.applet.Applet");
    	}
    }

效果如下图:

![20140418193403222.png][]

由最代码官方编辑于2014-7-3 23:41:12

[java_jar]: http://www.zuidaima.com/share/1785617759915008.htm
[20140418193403222.png]: http://static.zuidaima.com/images/168/201404/20140418193403222.png