ajax 请求后台数据返回异常及提示404方法名不存在

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1、正常使用 Ajax 调取后台数据时，提示方法名不存在，Ajax前端正常，方法类bean注入正常，方法注解正常。但参数解析时出现异常。

@RequestMapping(value="/getProject")

	@ResponseBody

	public Map<String,Object> getProject(@RequestBody Map<String, Object> paraMap,HttpServletRequest request){

		Map<String, Object> map = new HashMap<String, Object>();

		String projectName = (String)paraMap.get("projectName");

强转时出现了异常，未被捕获。具体为什么这个异常会影响request解析暂时还不晓得，有哪位大神知道的请留言解释一下，谢谢。

2、方法正常流转之后无法将数据直接返回页面。提示异常如下：

十月 19, 2016 2:36:47 下午 org.apache.catalina.core.StandardWrapperValve invoke

严重: Servlet.service() for servlet spring-mvc threw exception

javax.servlet.ServletException: File "/jsp/error.jsp" not found

	at org.apache.jasper.servlet.JspServlet.handleMissingResource(JspServlet.java:335)

	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)

	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)

	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551)

	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488)

	at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:229)

	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264)

	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)

	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)

	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)

	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)

	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920)

	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:827)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:643)

	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)

	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

	at com.****.common.filter.SessionFilter.doFilter(SessionFilter.java:111)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)

	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)

	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)

	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)

	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)

	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)

	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)

	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)

	at java.lang.Thread.run(Thread.java:745)