org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json;char

解决方法：添加

contentType : 'application/json',

$.ajax({
  type: "POST",
  url: "/xxx",
  dataType:'json',
  contentType : 'application/json','false',
  data:{"name":1,"value2":2},
  success:function (data) {    
  }
});