寻找类冲突的神奇代码

最新推荐文章于 2025-06-11 15:18:58 发布

原创最新推荐文章于 2025-06-11 15:18:58 发布 · 430 阅读

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当项目碰到类冲突，真的很恼火，

Caused by: java.lang.NoSuchMethodError: com.BossPkgHead2.<init>(JLjava/lang/String;)V

于是有了下面这个做法：

<%@ page language="java" contentType="text/html; charset=GBK"
	pageEncoding="GBK"%>

<%@page import="org.springframework.core.io.support.PathMatchingResourcePatternResolver"%>
<%@page import="org.springframework.core.io.Resource"%>
<%
	PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
	Resource[] resources = resolver
						.getResources("classpath*:/com/BossPkgHead2.class");
	out.println("test:" + resources.length + "<br>");
	for (Resource resource : resources)
	{
		out.println(resource.getURI() + "<br>");
	}
%>

将jsp放到项目中访问一下，通过resolver取获取指定的class文件，可以得到类冲突的具体描述：

test:2
jar:file:/usr/local/brand/commonlib/com.common-2.0.0.jar!/com/BossPkgHead2.class
jar:file:/usr/local/brand/commonlib/com.protocol-1.0.0.jar!/com/BossPkgHead2.class

raywu同学确实比较高，呵呵。