学习使用谷歌浏览器：Network中选择对应的网络请求，会有对应的Headers、Response、Preview、Timing的信息。
- header的信息：主要是表头信息（General、Respose Headers、Request Headers、Request Payload）如图所示，Request Payload是前台传递后台的参数。
- Preview:也可以查看传递的参数
- Response:可以查看传递给后台的状态（成功（参数以及成功的代码代号）或者失败（还可以查看失败原因以及传递参数、失败代码号））eg:成功的如下：{"metadata":{"requestId":null,"requestType":null,"url":null},"data":{"activityId":"310920609242550272","activityName":"当当","activityType":2,"userNum":0,"timeFlag":1,"startDate":"20161103","endDate":"20161104","activityStatusId":"4","comments":"测算过","isValid":1,"createUser":"创建人1","createTime":null,"modifyUser":null,"modifyTime":null},"statusCode":201} 失败的如下：{"code":400,"message":"\n### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1\n### The error may involve com.asiainfodata.perec.activity.mapper.OperpConfMapper.insertList-Inline\n### The error occurred while setting parameters\n### SQL: INSERT INTO OPERP_CONF_INFO ( activity_id,channel_id,operp_id,rec_position,scene_priority,scene_id ) VALUES\n### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1\n; bad SQL grammar []; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1","error":["You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1"]}。具体图片如下：
以上便于前端和java联调时，定位联调错误的原因。
