查找冲突的jar文件

我们经常会遇到启动程序报错。jar包冲突的情况。

但是怎么知道冲突的类在哪些jar包里面呢。

一般报错都会有相类的冲突类。

把这个类拷贝放在下面的程序中:className

然后指定你项目的lib目录地址。

run !

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 = "DocumentBuilderFactoryImpl"; // 要查询的class,要带包名的类名		String libPath = "E:/myeclipse65/bzz2/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");	}}