HTTP Status 500 - Request processing failed; nested exception is java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: " a" 详细如下： HTTP Status 500 - Request processing failed; nested exception is java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: " a" type Exception report message Request processing failed; nested exception is java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: " a" description The server encountered an internal error that prevented it from fulfilling this request. exception org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: " a" org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:656) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560) javax.servlet.http.HttpServlet.service(HttpServlet.java:646) javax.servlet.http.HttpServlet.service(HttpServlet.java:727) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) com.jeecms.common.web.XssFilter.doFilter(XssFilter.java:41) org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) com.jeecms.common.web.ProcessTimeFilter.doFilter(ProcessTimeFilter.java:35) root cause java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: " a" java.net.URLDecoder.decode(URLDecoder.java:192) com.jeecms.common.web.XssHttpServletRequestWrapper.xssEncode(XssHttpServletRequestWrapper.java:83) com.jeecms.common.web.XssHttpServletRequestWrapper.getParameterValues(XssHttpServletRequestWrapper.java:54) org.springframework.web.util.WebUtils.getParametersStartingWith(WebUtils.java:607) org.springframework.web.bind.ServletRequestParameterPropertyValues.<init>(ServletRequestParameterPropertyValues.java:77) org.springframework.web.bind.ServletRequestParameterPropertyValues.<init>(ServletRequestParameterPropertyValues.java:51) org.springframework.web.bind.ServletRequestDataBinder.bind(ServletRequestDataBinder.java:105) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.doBind(AnnotationMethodHandlerAdapter.java:736) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doBind(HandlerMethodInvoker.java:805) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments(HandlerMethodInvoker.java:359) org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:171) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426) org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560) javax.servlet.http.HttpServlet.service(HttpServlet.java:646) javax.servlet.http.HttpServlet.service(HttpServlet.java:727) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) com.jeecms.common.web.XssFilter.doFilter(XssFilter.java:41) org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) com.jeecms.common.web.ProcessTimeFilter.doFilter(ProcessTimeFilter.java:35) note The full stack trace of the root cause is available in the Apache Tomcat/7.0.52 logs. Apache Tomcat/7.0.52

这个是什么情况下出现的错误

回复第2楼，我把注册的路径换成算了以前的，<form action="/jeecms/register.jspx"  结果就报错了

为什么要改注册路径呢？改路径肯定报错呀

后台设置为推荐

回复第4楼 不是的，我之前是不要部署路径/jeecms的 ，我单页里面引用了会员的注册，所以相对应的路径也是吧action=“/jeecms/register.jspx”中，jeecms去掉， 就出现了我的说的问题，既插入不了数据库，也不报错。现在是改回了部署路径，加上了/jeecms，就出现了上面那个错误。

改回来后重新启动下服务看下