insert into test (name) values (#{name})&_mybatis中inser">
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实际开发中,有时候需要把当前插入的数据id取出来,但又不想再去查一遍.
第一种方法:根据useGeneratedKeys获取返回值, 部分数据库不支持
- <insert id="insertUser" useGeneratedKeys="true" keyProperty="id" parameterType="com.entity.user">
-
- insert into test (name) values (#{name})
-
- </insert>
useGeneratedKeys="true": 设置是否使用JDBC的getGeneratedKeys方法获取主键并赋值到keyProperty设置的领域模型属性中.
keyProperty: 赋值的对象属性名称.
添加完成后, 直接根据对象属性取id. xxx.getID()
第二种方法:根据selectKey获取
- <insert id="saveServerAddress" parameterType="com.xxl.job.admin.core.model.ServerControl">
-
- <selectKey resultType="java.lang.Integer" order="AFTER" keyProperty="id">
-
- SELECT LAST_INSERT_ID()
-
- </selectKey>
-
- INSERT INTO
-
- XXL_JOB_SERVER_CONTROL
-
- (server)
-
- VALUES
-
- (#{serverAddress});

order属性, 指定是在insert语句前还是后执行selectKey操作,
xxx.getID()
Could not determine which parameter to assign generated keys to. Note that when there are multiple parameters, 'keyProperty' must include the parameter name (e.g. 'param.id'). Specified key properties are [id] and available parameters are [list, param1, tableName, param2]
insertBatch批量插入时,由于需要确定生成的键分配给到哪个参数,如果想要获取到list数据主键id,keyProperty需要指向list的id;
解决方法:
useGeneratedKeys="true" keyProperty="list.id"
- <insert id="insertBatch" useGeneratedKeys="true" keyProperty="list.id" parameterType="cn.xxx.HisFlow">
- INSERT INTO public."${tableName}" (...)
- VALUES
- <foreach collection="list" item="item" index="index" separator=",">
- ....
- </foreach>
- </insert>
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