mybatis之分页查询

/**
 * 持久层*/
public class StudentDao {
    /**
     * 增加学生
     */
    public void add(Student student) throws Exception{
        SqlSession sqlSession = MyBatisUtil.getSqlSession();
        try{
            sqlSession.insert("mynamespace.add",student);
        }catch(Exception e){
            e.printStackTrace();
            sqlSession.rollback();
            throw e;
        }finally{
            sqlSession.commit();
            MyBatisUtil.closeSqlSession();
        }
    }
    /**
     * 无条件分页查询学生
     */
    public List<Student> findAllWithFy(int start,int size) throws Exception{
        SqlSession sqlSession = MyBatisUtil.getSqlSession();
        try{
            Map<String,Integer> map = new LinkedHashMap<String,Integer>();
            map.put("pstart",start);
            map.put("psize",size);
            return sqlSession.selectList("mynamespace.findAllWithFy",map);
        }catch(Exception e){
            e.printStackTrace();
            sqlSession.rollback();
            throw e;
        }finally{
            sqlSession.commit();
            MyBatisUtil.closeSqlSession();
        }
    }
    /**
     * 有条件分页查询学生
     */
    public List<Student> findAllByNameWithFy(String name,int start,int size) throws Exception{
        SqlSession sqlSession = MyBatisUtil.getSqlSession();
        try{
            Map<String,Object> map = new LinkedHashMap<String,Object>();
            map.put("pname","%"+name+"%");
            map.put("pstart",start);
            map.put("psize",size);
            return sqlSession.selectList("mynamespace.findAllByNameWithFy",map);
        }catch(Exception e){
            e.printStackTrace();
            sqlSession.rollback();
            throw e;
        }finally{
            sqlSession.commit();
            MyBatisUtil.closeSqlSession();
        }
    }
    public static void main(String[] args) throws Exception{
        StudentDao dao = new StudentDao();
        System.out.println("-----------Page1");
        for(Student s:dao.findAllByNameWithFy("哈",0,3)){
            System.out.println(s.getId()+":"+s.getName()+":"+s.getSal());
        }
        System.out.println("-----------Page2");
        for(Student s:dao.findAllByNameWithFy("哈",3,3)){
            System.out.println(s.getId()+":"+s.getName()+":"+s.getSal());
        }
        System.out.println("-----------Page3");
        for(Student s:dao.findAllByNameWithFy("哈",6,3)){
            System.out.println(s.getId()+":"+s.getName()+":"+s.getSal());
        }
        System.out.println("-----------Page4");
        for(Student s:dao.findAllByNameWithFy("哈",9,3)){
            System.out.println(s.getId()+":"+s.getName()+":"+s.getSal());
        }
    }
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="mynamespace">
    <insert id="add" parameterType="loaderman.Student">
        insert into students(id,name,sal) values(#{id},#{name},#{sal})
    </insert>
    <select id="findAllWithFy" parameterType="map" resultType="loaderman.Student">
        select id,name,sal from students limit #{pstart},#{psize}
    </select>
    <select id="findAllByNameWithFy" parameterType="map" resultType="loaderman.Student">
        select id,name,sal from students where name like #{pname} limit #{pstart},#{psize}
    </select>
</mapper>