<select id="findListBypage" parameterType="cn.wh.util.PageUtil" resultType="Role">
    select * from t_role limit #{index},#{size}
  </select>

/**
   * 通过自定义类型来传参 实现分页功能 需要新建一个类型
   */
  @Test
  public void testPage1(){
    PageUtil pu = new PageUtil();
    pu.setIndex(3);
    pu.setSize(3);
    List<Role> list = session.selectList("cn.wh.mapper.RoleMapper.findListBypage", pu);
    for(Role r:list){
      System.out.println(r.getName());
    }
  }

<select id="findListBypage" parameterType="map " resultType="Role">
    select * from t_role limit #{index},#{size}
  </select>

/**
   * 可以通过map来传参 这样可以不用新建新的类型
   */
  @Test
  public void testPage2(){
    Map<String,Integer> map = new HashMap<String,Integer>();
    map.put("index", 0);
    map.put("size", 3);
    List<Role> list = session.selectList("cn.wh.mapper.RoleMapper.findListBypage", map);
    for(Role r:list){
      System.out.println(r.getName());
    }
  }

<select id="findAll" resultType="Role">
    select * from t_role
  </select>

/**
   * 使用rowBounds来实现分页
   */
  @Test
  public void testPage3(){
    //第一个参数 是index,开始下标
    //第二个参数 是size，每页显示记录数
    RowBounds bounds = new RowBounds(3, 3);
    List<Role> list = session.selectList("cn.wh.mapper.RoleMapper.findAll", null,bounds);
    for(Role r:list){
      System.out.println(r.getName());
    }
  }

<select id="selectLike" parameterType="string" resultType="Role">
    select *from t_role where name like #{name}
  </select>

/**
   * 模糊查询
   */
  @Test
  public void testLike1(){
    List<Role> list = session.selectList("cn.wh.mapper.RoleMapper.selectLike","%会员");
    for(Role r:list){
      System.out.println(r.getName());
    }
  }

<select id="selectLike1" parameterType="string" resultType="Role">
    select *from t_role where name like concat(#{name},'%');
  </select>

/**
   * 模糊查询
   */
  @Test
  public void testLike2(){
    List<Role> list = session.selectList("cn.wh.mapper.RoleMapper.selectLike1","黄");
    for(Role r:list){
      System.out.println(r.getName());
    }
  }