1、XyzMapper.xml
<insertid=“doSomething"parameterType="map"useGeneratedKeys="true"keyProperty=“yourId">
...
</insert>
或
<insert id=“doSomething" parameterType=“com.xx.yy.zz.YourClass" useGeneratedKeys="true" keyProperty=“yourId">
...
</insert>
2、XyzMapper.java
public int doSomething(Map<String, Object> parameters);
or
public 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);
Mybatis中insert中返回主键ID的方法,布布扣,bubuko.com
原文：http://blog.csdn.net/prevention/article/details/32825081