异常信息

WARN  o.s.w.s.m.s.DefaultHandlerExceptionResolver - Resolved exception caused by Handler execution: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported

1）使用post协议提交时，请检查Content type类型，如：

$.ajax({    type: "POST",    contentType: "application/json;charset=UTF-8",    url: "/reg",    data: JSON.stringify(data.field),    dataType: 'json',    success: function(result) {        if(result.code == 0) {            layer.msg('注册成功！');        } else {            layer.msg(result.msg);        }    }});

请检查上方contentType类型，如果想用springmvc @RequestBody注解做提交json字符串自动绑定到pojo入参时，类型需要是"application/json;charset=UTF-8"，否则会抛"not supported"异常。

2）缺少jackson-databind jar包

    
        
     
      com.fasterxml.jackson.datatype
         
     
      jackson-datatype-jsr310
     
    

然后controller直接这么用就好了：

@RequestMapping(value = "/reg", method = RequestMethod.POST)@ResponseBodypublic ResponseVo reg(@RequestBody user u) throws Exception {       //其他业务}