Error during WebSocket handshake: Unexpected response code: 200错误
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struts2+spring+mybatis项目加入Websocket出现
Error during WebSocket handshake: Unexpected response code: 200
或
Error during WebSocket handshake: Unexpected response code: 404错误，搞了半天，之前都没问题的，
struts.xml文件是加入了
<constant name="struts.action.excludePattern" value="/websocket*,^ws://.$"/>
也不行，最后找到原因，是.jar包的冲突，项目里的jar包跟tomcat中的jar包冲突，把项目lib文件下的websock.jar删除，问题解决。
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