Mybatis实现增删改查及分页查询的方法

Mybatis实现增删改查及分页查询的方法

MyBatis的前身就是iBatis。是一个数据持久层(ORM)框架。 MyBatis是支持普通SQL查询，存储过程和高级映射的优秀持 久层框架。MyBatis消除了几乎所有的JDBC 代码和参数的手工 设置以及结果集的检索。MyBatis使用简单的XML或注解用于 配置和原始映射，将接口和java 的POJOs（Plan Old Java Objects，普通的Java 对象）映射成数据库中的记录。每个 MyBatis应用程序主要都是使用SqlSessionFactory实例的，一个 SqlSessionFactory实例可以通过SqlSessionFactoryBuilder获得。

具体代码如下所示：

"http://mybatis.org/dtd/mybatis-3-config.dtd">

"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

select id,cate_id,name,price,description,order_no,update_time

from goods where id = #{id}

select id,cate_id,name,price,description,order_no,update_time from goods

<![CDATA[

select * from

(select g.*,rownum rn from (select * from goods) g where 1=1 and rownum <= #{pageBean.endNumber})

where rn >= #{pageBean.startNumber}

order by id asc

]]>

insert into goods(id,cate_id,name,price,description,order_no,update_time)

values(#{id},#{cateId},#{name},#{price},#{description},#{orderNo},#{updateTime})

update goods g

set g.name = #{name},g.order_no =#{orderNo}

where g.id = #{id}

delete from goods g

where g.id = #{id}

package com.clark.model;

import java.util.Date;

public class Goods {

private Integer id;

private Integer cateId;

private String name;

private double price;

private String description;

private Integer orderNo;

private Date updateTime;

public Goods(){

}

public Goods(Integer id, Integer cateId, String name, double price,

String description, Integer ordhttp://erNo, Date updateTime) {

super();

this.id = id;

this.cateId = cateId;

this.name = name;

this.price = price;

this.description = description;

this.orderNo = orderNo;

this.updateTime = updateTime;

}

public Integer getId() {

return id;

}

public void setId(Integer id) {

this.id = id;

}

public Integer getCateId() {

return cateId;

}

public void setCateId(Integer cateId) {

this.cateId = cateId;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public double getPrice() {

return price;

}

public void setPrice(double price) {

this.price = price;

}

public String getDescription() {

return description;

}

public void setDescription(String description) {

this.description = description;

}

public Integer getOrderNo() {

return orderNo;

}

public void setOrderNo(Integer orderNo) {

this.orderNo = orderNo;

}

public Date getTimeStamp() {

return updateTime;

}

public void setTimeStamp(Date updateTime) {

this.updateTime = updateTime;

}

@Override

public String toString() {

return "[goods include:Id="+this.getId()+",name="+this.getName()+

",orderNo="+this.getOrderNo()+",cateId="+this.getCateId()+

",updateTime="+this.getTimeStamp()+"]";

}

}

package com.clark.model;

//模拟的一个分页对象PageBean

public class PageBean {

//开始数

private Integer startNumber;

//结束数

private Integer endNumber;

public PageBean(){

}

public PageBean(Integer startNumber, Integer endNumber) {

super();

this.startNumber = startNumber;

this.endNumber = endNumber;

}

public Integer getStartNumber() {

return startNumber;

}

public void setStartNumber(Integer startNumber) {

this.startNumber = startNumber;

}

public Integer getEndNumber() {

return endNumber;

}

public void setEndNumber(Integer endNumber) {

this.endNumber = endNumber;

}

}

package com.clark.mybatis;

import java.io.IOException;

import java.io.Reader;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.apache.ibatis.io.Resources;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import com.clark.model.Goods;

import com.clark.model.PageBean;

public class TestGoods {

public static void main(String[] args) throws IOException {

String resource = "configuration.xml";

Reader reader = null;

SqlSessionFactory sessionFactory = null;

SqlSession session = null;

try {

reader = Resources.getResourceAsReader(resource);

sessionFactory = new SqlSessionFactoryBuilder().build(reader);

session = sessionFactory.openSession();

PageBean pageBean = new PageBean(8, 20);

Map map = new HashMap();

map.put("pageBean", pageBean);

List gs = findGoodsByPage(session,map);

for (Goods goods2 : gs) {

System.out.println(goods2.toString());

}

} catch (IOException e) {

e.printStackTrace();

}finally{

session.close();

reader.close();

}

}

//find by id

phttp://ublic static Goods findGoodById(SqlSession session,Integer id){

//clark对应着goodMapper.xml配置文件中的namespace name="clark"

Goods goods = (Goods)session.selectOne("clark.selectGoodById", id);

return goods;

}

//find all

public static List findAllGoods(SqlSession session){

List goods = session.selectList("clark.selectAllGoods");

return goods;

}

public static List findGoodsByPage(SqlSession session,Map map){

List goods = session.selectList("clark.selectGoodsByPage",map);

return goods;

}

//insert a goods

public static int insertGoods(SqlSession session,Goods goods){

int result = session.insert("clark.insertGood", goods);

session.commit();

return result;

}

//update goods

public static int updateGoods(SqlSession session,Goods goods){

int result = session.update("clark.updateGood", goods);

session.commit();

return result;

}

//delete goods

public static int deleteGood(SqlSession session,Integer id){

int result = session.delete("clark.deleteGood", id);

session.commit();

return result;

}

}

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