detail 报400错误 HTTP Status 400 – Bad Request The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing). 怎么办？？
web.xml的<param-name>readonly</param-name><param-value>false</param-value>属性配置。
参考下这个，http://blog.csdn.net/tatsuyalminami/article/details/70767248