1、使用Limit分页
使用Mybatis实现分页,核心SQL
select * from user limit startIndex,pageSize
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UserMapper接口
//分页 List<User> getUserByLimit(Map<String,Integer> map);
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Mapper.xml
<!--分页--> <select id="getUserByLimit" parameterType="map" resultMap="UserMap"> select * from mybatis.user limit #{startIndex},#{pageSize} </select>
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测试
@Test public void getUserByLimit(){ SqlSession sqlSession = MyBatisUtils.getSqlSession(); UserMapper mapper = sqlSession.getMapper(UserMapper.class); HashMap<String, Integer> map = new HashMap<>(); map.put("startIndex",0); map.put("pageSize",2); List<User> userList = mapper.getUserByLimit(map); for (User user : userList) { System.out.println(user); } sqlSession.close(); }
2、RowBounds分页
不使用SQL语句实现分页
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UserMapper接口
List<User> getUserByRowBounds();
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mapper.xml
<!--分页2--> <select id="getUserByRowBounds" resultMap="UserMap"> select * from mybatis.user </select>
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测试
@Test public void getUserByRowBounds(){ SqlSession sqlSession = MyBatisUtils.getSqlSession(); //RowBounds实现 RowBounds rowBounds = new RowBounds(0, 2); //通过java代码层面实现分页 List<User> userList = sqlSession.selectList("com.tt.dao.UserMapper.getUserByRowBounds",null,rowBounds); for (User user : userList) { System.out.println(user); } sqlSession.close(); }
3、分页插件
pageherlper分页插件的使用:官方文档https://pagehelper.github.io/docs/howtouse/