MyBatis，如何获取插入的自动生成密钥?[MySql]

2022-01-09 00:00:00 insert mysql java mybatis

如何使用 MyBatis 获取插入的生成密钥?我读了很多关于这个问题的页面，但我仍然被阻止，有人可以帮助我吗?这是我的代码:

how can I get the generated key of an insert with MyBatis? I read many pages about this question but I'm still blocked, could anyone help me, please? This is my code:

桌子:

ID_ERROR long primary key
DATE timestamp
TYPE varchar
MESSAGE varchar
SOURCE varchar

道:

Long returnedId = 0L;
MyMapper myMapper = this.sqlSession.getMapper(MyMapper.class);
myMapper.insertRecord(returnedId, Utils.now(), t.getClass().getName(), t.getMessage(), c.getName());
return returnedId;

mapper.java:

The mapper.java:

public void insertRecord(@Param("returnedId") Long returnedId, @Param("timestamp")Timestamp timestamp,@Param("type") String type,@Param("message") String message,@Param("source") String source);

mapper.xml

 <insert id="insertRecord" parameterType="map" useGeneratedKeys="true"  keyProperty="ID_ERROR">
    INSERT INTO errors (
        DATE,
        TYPE,
        MESSAGE,
        SOURCE
    )
    VALUES (
        #{timestamp},
        #{type},
        #{message},
        #{source}
    )
    <selectKey resultType="long" order="AFTER" keyProperty="returnedId">
        SELECT LAST_INSERT_ID() as returnedId
    </selectKey>
</insert>

怎么了?如何获取此插入的生成密钥?谢谢！

What is wrong? How can I get the generated key of this insert? Thanks!

推荐答案

如果要获取生成的主键，应通过Map或POJO Object

If you want to get the generated primary key, you should pass the arguments by Map or POJO Object 

public void insertRecord(Map<String, Object> map);

调用映射方法时，将值放入映射.

When call the mapping method, put values to map.

Map<String, Object> map = new HashMap<String, Object>();
map.put("returnedId", 0);
map.put("message", message);
// other paramters
mapper.insertRecord(map);
return map.get("returnedId");

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