Spring事务处理、Spring与RESTful

<?xml version="1.0" encoding="UTF-8" ?>
<!-- Dept.xml 在com.tarena.entity 包中  -->  
<!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"      
 "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">
<!-- namespace 的值是 DeptMapper 接口
  每个Mapper 接口对应一个配置文件  -->
<mapper namespace="cn.tedu.cloud_note.dao.RelationDao">
    <!-- 使用两条SQL语句加载数据 -->
    <select id="findUserAndBooks" parameterType="String" resultMap="userMap1">
        select * from cn_user
                        where cn_user_id=#{id}
    </select>
    <resultMap type="cn.tedu.cloud_note.entity.User" id="userMap1">
        <id property="cn_user_id" column="cn_user_id" />
        <result property="cn_user_name" column="cn_user_name"/>
        <!-- 指定books属性是一个List集合 ,泛型为Book -->
        <!-- javaType是返回类型 -->
        <collection property="books" 
        javaType="java.util.List"
        ofType="cn.tedu.cloud_note.entity.Book"
        select="findBooks"
        column="cn_user_id">
        </collection>
    </resultMap>
    <select id="findBooks" parameterType="String" resultType="cn.tedu.cloud_note.entity.Book">
        select * from cn_notebook
                        where cn_user_id=#{userId}
    </select>
</mapper>

package cn.tedu.cloud_note.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public abstract class TestBase {
    public ApplicationContext getContext() {
        String[] conf = {
                "conf/spring-mvc.xml",
                "conf/spring-mybatis.xml"
        };
        ApplicationContext ac = new ClassPathXmlApplicationContext(conf);
        return ac;
    }
}

package cn.tedu.cloud_note.test.dao;

import org.junit.Before;
import org.junit.Test;

import cn.tedu.cloud_note.dao.RelationDao;
import cn.tedu.cloud_note.entity.User;
import cn.tedu.cloud_note.test.TestBase;

public class TestRelationDao extends TestBase{
    private RelationDao rdao;
    
    @Before
    public void init() {
        rdao = super.getContext().getBean("relationDao",RelationDao.class);
    }
    @Test
    public void test() {
        User user = rdao.findUserAndBooks("");
    }
    
}