import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.apache.ibatis.session.SqlSession;
import cn.itcast.javaee.mybatis.util.MybatisUtil;
/**
* 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<Student> findAllWithFy(int start,int size) throws Exception{
SqlSession sqlSession = null;
try{
sqlSession = MybatisUtil.getSqlSession();
Map<String,Object> map = new LinkedHashMap<String,Object>();
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<Student> findAllByNameWithFy(String name,int start,int size) throws Exception{
SqlSession sqlSession = null;
try{
sqlSession = MybatisUtil.getSqlSession();
Map<String,Object> map = new LinkedHashMap<String, Object>();
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<Student> 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<Student> 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<Student> studentList3 = dao.findAllByNameWithFy("哈",6,3);
for(Student s : studentList3){
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="cn.itcast.javaee.mybatis.app10.Student">
<resultMap type="cn.itcast.javaee.mybatis.app10.Student" id="studentMap">
<id property="id" column="students_id"/>
<result property="name" column="students_name"/>
<result property="sal" column="students_sal"/>
</resultMap>
<insert id="add" parameterType="cn.itcast.javaee.mybatis.app10.Student">
insert into students(students_id,students_name,students_sal)
values(#{id},#{name},#{sal});
</insert>
<select id="findAllWithFy" parameterType="map" resultMap="studentMap">
select students_id,students_name,students_sal
from students
limit #{pstart},#{psize}
</select>
<select id="findAllByNameWithFy" parameterType="map" resultMap="studentMap">
select students_id,students_name,students_sal
from students
where students_name like #{pname}
limit #{pstart},#{psize}
</select>
</mapper>
原文地址：http://blog.51cto.com/357712148/2107443
