java.lang.IllegalStateException: Post too large
at org.apache.coyote.tomcat5.CoyoteRequest.parseRequestParameters(CoyoteRequest.java:2861)<br />
at org.apache.coyote.tomcat5.CoyoteRequest.getParameter(CoyoteRequest.java:1267)<br />
at org.apache.coyote.tomcat5.CoyoteRequestFacade.getParameter(CoyoteRequestFacade.java:375)
网上查了下原因是超过了post的最大限制，在Tomcat中把maxPostSize设为0即为无限大。
参考： http://blog.csdn.net/xiaxiaorui2003/article/details/4122240
http://stackoverflow.com/questions/123335/what-causes-java-lang-illegalstateexception-post-too-large-in-tomcat-mod-jk