Mybatis+Postgresql 批量插入返回主键

项目中遇到，记录一下。

Entity

public class Student{
	private Integer id;
	private String name;
	private Intger age ;
	private double salary;
}

Service

@Service
public class Save implements ISave{
	@Autowired
	private Mapper mapper;
	
	@Override
	public void save(List<Student> list) {
		mapper.save(list);
		for(int i = 0; i<list.size();i++){
			System.out.println(list.get(i).getId());
		}
	}
}
这里打印结果就是刚才插入的数据返回的主键，XML会根据keyProperty属性的值把主键放到所对应的字段里

Mapper

@Mapper
public interface Mapper {
	void save(@Param("list")List<Student> list);//正常调用就可以
}

XML

<insert id="save" parameterType="java.util.List"
    useGeneratedKeys="true" keyProperty="id">
    INSERT INTO 
    	student_table
    	(
    	name,
    	age,
    	salary
    	)
    VALUES
	<foreach collection="list" item="item" index="index" separator=",">
    	(
    	#{item.name},
    	#{item.age},
    	#{item.salary}
    	)
	</foreach>
</insert>
注意两个属性：
 useGeneratedKeys="true" //是否返回主键
 keyProperty="id" //实体类中接收主键的字段