Mybatis批量插入数据返回主键的实现
人气:0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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