错误信息：responseText: "<html><head><title>Apache Tomcat/7.0.67 - Error report</title><style><!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A {color : black;}A.name {color : black;}HR {color : #525D76;}--></style> </head><body><h1>HTTP Status 404 - /WEB-INF/pages/[{"fieldName":"姓名","fileId":31,"id":77,"status":"0"},{"fieldName":"密码","fileId":31,"id":78,"status":"0"},{"fieldName":"账号","fileId":31,"id":79,"status":"0"}].jsp</h1><HR size=\"1\" noshade=\"noshade\"><p><b>type</b> Status report</p><p><b>message</b> <u>/WEB-INF/pages/[{"fieldName":"姓名","fileId":31,"id":77,"status":"0"},{"fieldName":"密码","fileId":31,"id":78,"status":"0"},{"fieldName":"账号","fileId":31,"id":79,"status":"0"}].jsp</u></p><p><b>description</b> <u>The requested resource is not available.</u></p><HR size=\"1\" noshade=\"noshade\"><h3>Apache Tomcat/7.0.67</h3></body></html>"
错误描述 ：ajax 请求 明明后台代码已经执行 并返回了json 却 一直跳到error
经分析是请求没有返回状态码，这是因为我用的是SpringMVC框架，前后端使用JSON传递数据，因为返回的是对象，而忘记了添加
@ResponseBody 或者 @RestController
注解，所以 Spring对我的返回值进行了映射，但是映射结果又对应不到视图，所以返回了404