JAVA.LANG.NOSUCHMETHODEXCEPTION:ORG.APACHE.CATALINA.DEPLOY.WEBXML Addservlet

Recently in learning WebSocket's knowledge, I found some routines from the Tomcat sample file, but copied the project to MyEclipse, and the exception was reported when I started Tomcat, because I introduced two jar packages into this project. Catalina.jar,tomcat-coyote.jar. This is the two jar package provided by Tomcat. This exception occurs when the project is deployed in Tomcat and should be the cause of the packet conflict. I searched from the Internet a lot of solutions, there are three kinds of main.

1. Remove the Catalina.jar package that you added under referenced Libraries , and then remove the deployment program under WebApp and redeploy.

2, in Tomacat context.xml add <loader delegate= "true"/>

3. Modify the deployment configuration of the package, right-click project-> properties-> myeclipse-> Web, deployment Modify Lib ... Policies Cancel the default cancel jars from build path

These three ways should correspond to different projects to use, I appear this exception using the first and the third do not solve the problem, and ultimately the second way is the simplest and easiest to achieve. But for the second way, because it is modifying the Tomcat configuration file, I do not know what will cause the exception later. Therefore, if you can use the first or the third way to solve, it is best not to use the second type. Or, when you actually deploy the program, modify the files that were modified in Tomcat back.

JAVA.LANG.NOSUCHMETHODEXCEPTION:ORG.APACHE.CATALINA.DEPLOY.WEBXML Addservlet