作业1、2、3、4 2019/10/23

使用注解模式:

接口:

package com.test;

import com.pojo.Goods;
import org.apache.ibatis.annotations.Select;

import java.util.List;
import java.util.Map;

public interface IgoodsMapper {

    /**
     * 需求： 通过商品名称 （模糊查询）、供应商（供应商id）、是否付款
     * 查询到 订单编码，商品名称，供应商名称，账单，金额，是否付款，创建时间
     */
    @Select("SELECT g.goodsCode,g.goodsName,p.provider_name,g.money, g.payState,g.timeStart FROM goods g,provider p WHERE g.goodsName LIKE concat('%',#{goods_Name},'%') AND p.provider_id = #{provider_id} AND g.payState = #{goods_payState} AND g.goods_id = p.goods_id")
    List<Goods> getGoodsList(Map<String,String> map);



}

IgoodsMapper

测试类:

package com.demo.test;

import com.pojo.Demo;
import com.pojo.Goods;
import com.pojo.Grade;
import com.test.DemoMapper;
import com.test.IgoodsMapper;
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 org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Test01 {


    @Test
    public void test03() throws IOException {
        //1、读取配置文件
        InputStream in = Resources.getResourceAsStream("mybatis-config.xml");
        //2、创建SqlSessionFactory工厂
        SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
        SqlSessionFactory factory = builder.build(in);
        //3、创建 SqlSession对象
        SqlSession sqlSession = factory.openSession();
        //4、实现方法
        IgoodsMapper mapper = sqlSession.getMapper(IgoodsMapper.class);
        Map<String,String> map = new HashMap<String, String>();
        map.put("goods_Name","机");
        map.put("provider_id","10086");
        map.put("goods_payState","1");
        List<Goods> list = mapper.getGoodsList(map);
        System.out.println("---------------------------");
        for (Goods goods:list){

            System.out.println(goods.getGoodsCode()+" "+goods.getGoodsName()+" "+goods.getProvider_name()+
                    " "+goods.getMoney()+" "+
                    goods.getPayState()+" "+goods.getTimeStart());
        }
        System.out.println("------------------------");
        //5、释放资源
        sqlSession.close();
        in.close();

    }
}

test01.java

------------------------------------------------------------------------------------------------------------------------

这里我以添加商品库存数量为例:

goods_id为主键 goods_num为库存数量

实现思路：

1、为实体类添加这两个属性

接口代码:添加这些

    @Insert("UPDATE provider SET goods_num = goods_num+#{goods_num} WHERE goods_id = #{goods_id}")
    int addGoods_num(Map<String,Integer> map);

测试类:

package com.demo.test;

import com.pojo.Demo;
import com.pojo.Goods;
import com.pojo.Grade;
import com.test.DemoMapper;
import com.test.IgoodsMapper;
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 org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Test01 {
    public static void main(String[] args) throws IOException {
        InputStream in = Resources.getResourceAsStream("mybatis-config.xml");
        //2、创建SqlSessionFactory工厂
        SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
        SqlSessionFactory factory = builder.build(in);
        //3、创建 SqlSession对象
        SqlSession sqlSession = factory.openSession();
        //4、实现方法
        IgoodsMapper mapper = sqlSession.getMapper(IgoodsMapper.class);

        Map<String,Integer> map = new HashMap<String, Integer>();
        map.put("goods_id",1);
        map.put("goods_num",2);
        int i = sqlSession.insert("addGoods_num", map);

        if(i>0){
            sqlSession.commit();
            System.out.println("添加成功");
        }else{
            System.out.println("添加失败");
        }
        //5、释放资源
        sqlSession.close();
        in.close();

    }

}

test01.java

测试结果:

添加前的的数据库数据

:重点看 goods_ id = 1;

goods_num是否添加我们测试类写的2

变成8

结果:

------------------------------------------------------------------------------------------------------------------------

把provider里的供应商名称修改名称:

把goods_id = 1的provider_name的小米修改成腾讯

代码如下:

接口添加代码:

 @Insert("UPDATE provider p SET p.provider_name = #{provider_name} WHERE goods_id = #{goods_id}")
    int update_provider_name(Map<String,String> map);

测试类:

package com.demo.test;

import com.pojo.Demo;
import com.pojo.Goods;
import com.pojo.Grade;
import com.test.DemoMapper;
import com.test.IgoodsMapper;
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 org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Test01 {
    public static void main(String[] args) throws IOException {
        InputStream in = Resources.getResourceAsStream("mybatis-config.xml");
        //2、创建SqlSessionFactory工厂
        SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
        SqlSessionFactory factory = builder.build(in);
        //3、创建 SqlSession对象
        SqlSession sqlSession = factory.openSession();
        //4、实现方法
        IgoodsMapper mapper = sqlSession.getMapper(IgoodsMapper.class);

        Map<String,String > map = new HashMap<String, String >();
        map.put("goods_id","1");
        map.put("provider_name","腾讯");
        int i = sqlSession.update("update_provider_name", map);

        if(i>0){
            sqlSession.commit();
            System.out.println("添加成功");
        }else{
            System.out.println("添加失败");
        }
        //5、释放资源
        sqlSession.close();
        in.close();

    }

}

test01.java

结果:

--------------------------------------------------------------------------------------

实现思路:

使用goods_id主键

效果:

把goods_id =4;删除

代码如下:

IgoodsMapper接口

    @Delete("DELETE FROM provider WHERE goods_id = #{goods_id}")
    int delectBy_provider_id(Map<String ,Integer> map);

测试类：

test01

package com.demo.test;

import com.pojo.Demo;
import com.pojo.Goods;
import com.pojo.Grade;
import com.test.DemoMapper;
import com.test.IgoodsMapper;
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 org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Test01 {
    public static void main(String[] args) throws IOException {
        InputStream in = Resources.getResourceAsStream("mybatis-config.xml");
        //2、创建SqlSessionFactory工厂
        SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
        SqlSessionFactory factory = builder.build(in);
        //3、创建 SqlSession对象
        SqlSession sqlSession = factory.openSession();
        //4、实现方法
        IgoodsMapper mapper = sqlSession.getMapper(IgoodsMapper.class);

        Map<String,Integer > map = new HashMap<String, Integer>();
        map.put("goods_id",4);
        int i = sqlSession.delete("delectBy_provider_id", map);

        if(i>0){
            sqlSession.commit();
            System.out.println("删除成功");
        }else{
            System.out.println("删除失败");
        }
        //5、释放资源
        sqlSession.close();
        in.close();

    }

}