【记录】ajax 设置请求header的Content-Type 为 application/json;charset=utf8

$.ajax({
          url: context.state.IpccSendIm,
          method: ‘POST‘,
          data: JSON.stringify(val),
          headers:{‘Content-Type‘:‘application/json;charset=utf8‘},
          dataType:"json",
          success: function (data) {
            console.log(data);
            imStore.addChatMsgDemo({
              msg: {
                role: ‘sys‘,
                contentType: ‘text‘,
                content: ‘-----会话结束-----‘,
                showTime: true
              }
            });
          }
  　　});