在mapper的xml文件中配置 useGeneratedKeys

以及 keyProperty 返回Id即可

<insert id="insertObject" useGeneratedKeys="true" keyProperty="id" parameterType=".xx.yy.zz.YourClass" useGeneratedKeys="true" keyProperty=“yourId">...</insert>

2、XyzMapper.java

public int doSomething(Map<String, Object> parameters);orpublic int doSomething(YourClass c);

3、要在map或c中有一个字段名为yourId，Mybatis会自动把主键值赋给这个字段。

Map<String, Object> parameters = new HashMap<String, Object>();parameters.put(“yourId”, 1234);...mapper.doSomething(parameters);System.out.println(“id of the field that is primary key” + parameters.get(“yourId"));

或

YourClass c = new YourClass();...mapper.doSomething(c);System.out.println(“id of the field that is primary key” + c.yourId);

好了，到此结束，希望对大家有所帮助！