详解springMVC之与json数据交互方法

function channel(){     //先获取选中的值     var channelId = $("#channelId option:selected").val();     //来判断发送的链接     if(channelId ==2){     **需要注意地方 start**     var schoolBannerInfo = {      "img": channelId,      "title": channelId,      "info": channelId,      "channelId": channelId     };     **需要注意地方 end**      $.ajax({         url:"ceshijson",         type:"post",         dataType:'json',         **需要注意地方 start**         contentType:'application/json;charset=utf-8',         data:JSON.stringify(schoolBannerInfo),         **需要注意地方 end**         success:function(data){            alert(data);         },         error:function(XMLHttpRequest, textStatus, errorThrown){           alert("Error")           alert(XMLHttpRequest.status);           alert(XMLHttpRequest.readyState);           alert(textStatus);           }      });     }   }

public class SchoolBannerInfo {  private Integer id;  private Date createTime;  private String img;  private String title;  private String info;  private Integer seq;  private Integer schoolId;  private String type;  private boolean enable;  private String link;  private String channelId;}

@RequestMapping(value="/ceshijson",produces="application/json;charset=UTF-8")@ResponseBodypublic SchoolBannerInfo ceshijson(@RequestBody SchoolBannerInfo schoolBannerInfo) throws IOException{//   Map<String,Object> map = new HashMap<String,Object>();//    map.put("channelId", channelId);//    ObjectMapper mapper = new ObjectMapper();//    channelId = mapper.writeValueAsString(map);    return schoolBannerInfo;  }