mybatis中的智能标签之二

智能标签foreach-Array， 智能标签foreach-List数据组，智能标签 foreach list自定义类型

接口：

/** * 智能标签foreach-Array * @param num * @return */public List<Student> findByForeachArray(int[] num);

/** * 智能标签foreach-List * @param list * @return */public List<Student> findByForeachList(List<Integer> list);

/** * 智能标签 foreach list自定义类型 * @param list * @return */public List<Student> findByForeachListStudent(List<Student> list);

xml文件（小配置）

<!--智能标签foreach-array--><select id="findByForeachArray" resultType="student">    SELECT  *from Student    <where>       <if test="array.length>0">           id in           <foreach collection="array" open="(" close=")" separator="," item="id">               #{id}           </foreach>       </if>    </where></select>

<!--智能标签foreach-list数组--><select id="findByForeachList" resultType="student">    SELECT  *from Student    <where>        <if test="list.size>0">            id in            <foreach collection="list" open="(" close=")" separator="," item="id">                #{id}            </foreach>        </if>    </where></select>

<!--智能标签foreach-list自定义类型--><select id="findByForeachListStudent" resultType="student">    SELECT  *from Student    <where>        <if test="list.size>0">            id in            <foreach collection="list" open="(" close=")" separator="," item="it">                #{it.id}            </foreach>        </if>    </where></select>

测试类：

/** * 智能标签foreach-array */@Testpublic  void findByForeachArray(){    SqlSession session = MyBatisUtil.getSession();    IStudentDAO mapper = session.getMapper(IStudentDAO.class);    int[] num={2,3,4};    List<Student> list = mapper.findByForeachArray(num);    for (Student item:list){        System.out.println(item.getName());    }    session.commit();    session.close();}

/** * 智能标签foreach-list数组 */@Testpublic  void findByForeachList(){    SqlSession session = MyBatisUtil.getSession();    IStudentDAO mapper = session.getMapper(IStudentDAO.class);   List<Integer> list=new ArrayList<Integer>();   list.add(2);   list.add(9);    List<Student> lists = mapper.findByForeachList(list);    for (Student item:lists){        System.out.println(item.getName());    }    session.commit();    session.close();}

/** * 智能标签foreach-list自定义类型 */@Testpublic  void findByForeachListStudent(){    SqlSession session = MyBatisUtil.getSession();    IStudentDAO mapper = session.getMapper(IStudentDAO.class);    List<Student> list=new ArrayList<Student>();    Student student=new Student();    student.setId(2);    Student students=new Student();    students.setId(9);    list.add(student);    list.add(students);    List<Student> lists = mapper.findByForeachListStudent(list);    for (Student item:lists){        System.out.println(item.getName());    }    session.commit();    session.close();}