mybatis(3)分页查询和条件分页查询

mybatis.xml，db.properties, MybatisUtil.java ,student.java和第一篇文章一样,所建的表也是一样的

StudentDao.java

/**
 * 持久层 
 * @author AdminTC
 */
public class StudentDao {
	/**
	 * 增加学生
	 */
	public void add(Student student) throws Exception{
		SqlSession sqlSession = null;
		try{
			sqlSession = MybatisUtil.getSqlSession();
			sqlSession.insert(Student.class.getName()+".add",student);
			sqlSession.commit();
		}catch(Exception e){
			e.printStackTrace();
			sqlSession.rollback();
			throw e;
		}finally{
			MybatisUtil.closeSqlSession();
		}
	}
	/**
	 * 无条件分页
	 * @param start 表示在mysql中从第几条记录的索引号开始显示，索引从0开始
	 * @param size 表示在mysql中最多显示几条记录
	 */
	public List findAllWithFy(int start,int size) throws Exception{
		SqlSession sqlSession = null;
		try{
			sqlSession = MybatisUtil.getSqlSession();
			
			Map map = new LinkedHashMap();
			map.put("pstart",start);
			map.put("psize",size);
			return sqlSession.selectList(Student.class.getName()+".findAllWithFy",map);
		}catch(Exception e){
			e.printStackTrace();
			throw e;
		}finally{
			MybatisUtil.closeSqlSession();
		}
	}
	/**
	 * 有条件分页
	 */
	public List findAllByNameWithFy(String name,int start,int size) throws Exception{
		SqlSession sqlSession = null;
		try{
			sqlSession = MybatisUtil.getSqlSession();
			Map map = new LinkedHashMap();
			map.put("pname","%"+name+"%");
			map.put("pstart",start);
			map.put("psize",size);			
			return sqlSession.selectList(Student.class.getName()+".findAllByNameWithFy",map);
		}catch(Exception e){
			e.printStackTrace();
			throw e;
		}finally{
			MybatisUtil.closeSqlSession();
		}
	}
	
	public static void main(String[] args) throws Exception{
		StudentDao dao = new StudentDao();
		
		//for(int i=1;i<=10;i++){
		//	dao.add(new Student(i,"哈哈",7000D));
		//}
		
		System.out.println("--------------------第一页");
		List studentList1 = dao.findAllByNameWithFy("哈",0,3);
		for(Student s : studentList1){
			System.out.println(s.getId()+":"+s.getName()+":"+s.getSal());
		}
		System.out.println("--------------------第二页");
		List studentList2 = dao.findAllByNameWithFy("哈",3,3);
		for(Student s : studentList2){
			System.out.println(s.getId()+":"+s.getName()+":"+s.getSal());
		}
		System.out.println("--------------------第三页");
		List studentList3 = dao.findAllByNameWithFy("哈",6,3);
		for(Student s : studentList3){
			System.out.println(s.getId()+":"+s.getName()+":"+s.getSal());
		}
		
	}
}

StudentMapper.xml

	

	
		
		
		
	
	
	
	
		insert into students(students_id,students_name,students_sal) 
		values(#{id},#{name},#{sal});
	
	
	
	
		select students_id,students_name,students_sal 
		from students 
		limit #{pstart},#{psize}
	
	
	
	
		select students_id,students_name,students_sal 
		from students 
		where students_name like #{pname}
		limit #{pstart},#{psize}