在mapper的xml文件中配置 useGeneratedKeys
以及 keyProperty 返回Id即可
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<insert id="insertObject" useGeneratedKeys="true" keyProperty="id" parameterType="www.change.tm.model.Orders" >
insert into orders
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="number!=null">
OrderNumber,
</if>
<if test="orderTime!=null">
orderTime,
</if>
</trim>
values
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="number!=null">
#{number},
</if>
<if test="orderTime!=null">
#{orderTime},
</if>
</trim>
</insert>
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1、XyzMapper.xml
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<insertid=“doSomething"parameterType="map"useGeneratedKeys="true"keyProperty=“yourId">
...
</insert>
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或
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<insert id=“doSomething" parameterType=“com.xx.yy.zz.YourClass" useGeneratedKeys="true" keyProperty=“yourId">
...
</insert>
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2、XyzMapper.java
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public int doSomething(Map<String, Object> parameters);
or
public int
doSomething(YourClass c);
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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。
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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"));
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或
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YourClass c = new YourClass();
...
mapper.doSomething(c);
System.out.println(“id of the field that is primary key” + c.yourId);
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好了，到此结束，希望对大家有所帮助！
原文链接：http://blog.csdn.net/mr_yarnell/article/details/70146838
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