Mybatis批量插入数据返回主键的实现
时间:2020-10-16 12:45:21|栏目:JAVA代码|点击: 次
响应效果(id为主键):
{ "data": [ {"studentName": "张三","classNo": "一班","id": 111}, {"studentName": "李四","classNo": "二班","id": 112}, {"studentName": "王五","classNo": "一班","id": 113} ] }
控制层:
@PostMapping("/test") @ResponseBody public Map<String, Object> test(@RequestBody String data) { Map<String, Object> resultMap = new HashMap<String, Object>(); //非空校验 if (!checkParams.checkString(data)) { resultMap.put("code", "1"); resultMap.put("msg", "参数为空。"); return resultMap; } //json转List<Map<String, Object>> JSONObject json= new JSONObject(data); String dataString = json.get("data").toString(); com.google.gson.Gson gson = new Gson(); List<Map<String, Object>> list = gson.fromJson(dataString, new com.google.common.reflect.TypeToken<List<Map<String, Object>>>() { }.getType()); //请求接口 resultMap=registerService.test(list); return resultMap; }
接口:
public Map<String, Object> test(List<Map<String,Object>> data);
实现类:
@Override public Map<String, Object> test(List<Map<String,Object>> data) { Map<String, Object> resultMap = new HashMap<String, Object>(); registerMapper.test( data); resultMap.put("data",data); return resultMap; }
持久层:
public void test(List<Map<String,Object>> list);
statement:
<!-- =========================批量插入返回主键示例======================== --> <insert id="test" parameterType="list" useGeneratedKeys="true" keyProperty="id" > INSERT INTO student_info(student_name,class_no)VALUES <foreach collection="list" item="item" separator=","> ( #{item.studentName}, #{item.classNo} ) </foreach> </insert>
请求方式:
http://localhost/xxx/test
请求参数:
{ "data": [ {"studentName": "张三","classNo": "一班"}, {"studentName": "李四","classNo": "二班"}, {"studentName": "王五","classNo": "一班"} ] }
注意事项:
statement中keyProperty的赋值是可以自定义的,如果将keyProperty的值改为key,即改成如下:
<!-- =========================批量插入返回主键示例======================== --> <insert id="test" parameterType="list" useGeneratedKeys="true" keyProperty="key" > INSERT INTO student_info(student_name,class_no)VALUES <foreach collection="list" item="item" separator=","> ( #{item.studentName}, #{item.classNo} ) </foreach> </insert>
则响应效果(key为主键)如下:
{ "data": [ {"studentName": "张三","classNo": "一班","key": 111}, {"studentName": "李四","classNo": "二班","key": 112}, {"studentName": "王五","classNo": "一班","key": 113} ] }
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