package com.ydcc.model;public class Student
{private String id;private String name;private Integer age;}

<mapper namespace="com.ydcc.mappers.StudentMapper"><resultMap type="Student" id="StudentResult"><id property="id" column="id"/><result property="name" column="name"/><result property="age" column="age"/></resultMap><insert id="add" parameterType="Student"  useGeneratedKeys="true" keyProperty="id" ><!--keyProperty对应的是实体中的属性不是数据库-->insert into t_student (name,age) values (#{name},#{age})</insert></mapper> 

package com.ydcc.model;public class UUidStudent
{private String uuid;private String name;private int age;
}

<mapper namespace="com.ydcc.mappers.UUidStudentMapper"><resultMap type="Student" id="StudentResult"><id property="uuid" column="uuid"/><result property="name" column="name"/><result property="age" column="age"/></resultMap><insert id="add" parameterType="Student" useGeneratedKeys="true" keyProperty="uuid"><!-- 　　　　　<selectKey resultType="String" order="BEFORE" keyProperty="uuid"> SELECT uuid()</selectKey>insert into t_uuidstudent (uuid,name,age) values (#{uuid},#{name},#{age})　　　　 --><selectKey resultType="String" order="AFTER" keyProperty="uuid"> <!--keyProperty对应的是实体中的属性不是数据库-->SELECT uuid()</selectKey>insert into t_uuidstudent (uuid,name,age) values ( uuid(), #{name},#{age})</insert>
</mapper>

package com.ydcc.service;import org.apache.ibatis.session.SqlSession;
import org.apache.log4j.Logger;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;import com.ydcc.mappers.StudentMapper;
import com.ydcc.mappers.UUidStudentMapper;
import com.ydcc.model.Student;
import com.ydcc.model.UUidStudent;
import com.ydcc.util.SqlSessionFactoryUtil;public class StudentTest2
{private static Logger logger = Logger.getLogger(StudentTest2.class);private SqlSession sqlSession = null;private StudentMapper studentMapper = null;private UUidStudentMapper uuidstudentMapper = null;/*** 测试方法前调用* * @throws Exception*/@Beforepublic void setUp() throws Exception{sqlSession = SqlSessionFactoryUtil.openSession();studentMapper = sqlSession.getMapper(StudentMapper.class);uuidstudentMapper = sqlSession.getMapper(UUidStudentMapper.class);}/*** 测试方法后调用* * @throws Exception*/@Afterpublic void tearDown() throws Exception{sqlSession.close();}@Testpublic void testAdd(){logger.info("添加学生");Student student = new Student();student.setName("王五");student.setAge(12);studentMapper.add(student);logger.info("Student是：" + student.toString());sqlSession.commit();}@Testpublic void testAddUUidStudent(){logger.info("添加uuid学生");UUidStudent uuidStudent = new UUidStudent();uuidStudent.setName("uuid王五");uuidStudent.setAge(12);uuidstudentMapper.add(uuidStudent);logger.info("uuidStudent是：" + uuidStudent.toString());sqlSession.commit();}}