spring mvc3.0 ajax 中的问题
js代码：function ajaxLogin() {$.ajax({type:"post", url:"ajaxLogin.do", data:"username=acid&password=acid", success:function (account) {alert("Data Saved: " + account.username);}});}
Controller中的方法：
@RequestMapping(value = "/ajaxLogin.do", method = RequestMethod.POST)public @ResponseBodyAccount ajaxLogin(HttpServletRequest request, @ValidAccount account, BindingResult result){account = accountService.getAccount(account.getUsername(), account.getPassword());if (account == null){return null;}Utils.setToSession(SessionKey.USER_ID, account.getUsername());return account;}
结果出现了这个异常：
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representationat org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.writeWithMessageConverters(AnnotationMethodHandlerAdapter.java:993)at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.handleResponseBody(AnnotationMethodHandlerAdapter.java:933)at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.getModelAndView(AnnotationMethodHandlerAdapter.java:882)at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:428)at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at com.shop.core.context.ContextInitFilter.doFilter(ContextInitFilter.java:33)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:102)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)at java.lang.Thread.run(Thread.java:662)
看了看官方的demo，好像用到了jackson这个包。加上这个包后一切正常！
原因估计是序列化这个account对象的时候出了问题。因为我直接返回string对象不会出错。
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