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5.26总结

时间：2023-05-26 21:45:29浏览次数：35  
标签：总结 sqlSessionFactory String brand SqlSession 5.26 sqlSession brandMapper

package com.itheima.test;
//测试用例

import com.itheima.mapper.BrandMapper;
import com.itheima.pojo.Brand;
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 MyBatisTest {

@Test
public void testSelectAll() throws IOException {
    //1.获取sqlSessionFactory
    String resource = "mybatis-config.xml";
    InputStream inputStream = Resources.getResourceAsStream(resource);
    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

    //2.获取sqlSession对象
    SqlSession sqlSession = sqlSessionFactory.openSession();

    //3.获取Mapper接口的代理对象
    BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class);

    //4.执行方法
    List<Brand> brands = brandMapper.selectAll();
    System.out.println(brands);

    //5.释放资源
    sqlSession.close();

}



@Test
public void testSelectById() throws IOException {
    //接受参数
    int id = 1;

    //1.获取sqlSessionFactory
    String resource = "mybatis-config.xml";
    InputStream inputStream = Resources.getResourceAsStream(resource);
    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

    //2.获取sqlSession对象
    SqlSession sqlSession = sqlSessionFactory.openSession();

    //3.获取Mapper接口的代理对象
    BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class);

    //4.执行方法
    Brand brand = brandMapper.selectById(id);
    System.out.println(brand);

    //5.释放资源
    sqlSession.close();

}


@Test
public void testSelectByCondition() throws IOException {
    //接受参数
    int status = 1;
    String companyName = "华为";
    String brandName = "华为";

    //处理参数，模糊查询
    companyName =  "%" + companyName + "%";
    brandName =  "%" + brandName + "%";

    //封装成对象
    /*Brand brand = new Brand();
    brand.setStatus(status);
    brand.setCompanyName(companyName);
    brand.setBrandName(brandName);*/

    Map map = new HashMap();
    map.put("status" , status);
    map.put("companyName", companyName);
    map.put("brandName" , brandName);

    //1.获取sqlSessionFactory
    String resource = "mybatis-config.xml";
    InputStream inputStream = Resources.getResourceAsStream(resource);
    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

    //2.获取sqlSession对象
    SqlSession sqlSession = sqlSessionFactory.openSession();

    //3.获取Mapper接口的代理对象
    BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class);

    //4.执行方法
    //List<Brand> brands = brandMapper.selectByCondition(status, companyName, brandName);
    //List<Brand> brands = brandMapper.selectByCondition(brand);
    List<Brand> brands = brandMapper.selectByCondition(map);
    System.out.println(brands);

    //5.释放资源
    sqlSession.close();

}


@Test
public void testSelectByConditionSingle() throws IOException {
    //接受参数
    int status = 1;
    String companyName = "华为";
    String brandName = "华为";

    //处理参数，模糊查询
    companyName =  "%" + companyName + "%";
    brandName =  "%" + brandName + "%";

    //封装成对象
    Brand brand = new Brand();
    //brand.setStatus(status);
    //brand.setCompanyName(companyName);
    //brand.setBrandName(brandName);

    /*Map map = new HashMap();
    map.put("status" , status);
    map.put("companyName", companyName);
    map.put("brandName" , brandName);*/

    //1.获取sqlSessionFactory
    String resource = "mybatis-config.xml";
    InputStream inputStream = Resources.getResourceAsStream(resource);
    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

    //2.获取sqlSession对象
    SqlSession sqlSession = sqlSessionFactory.openSession();

    //3.获取Mapper接口的代理对象
    BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class);

    //4.执行方法
    //List<Brand> brands = brandMapper.selectByCondition(status, companyName, brandName);
    //List<Brand> brands = brandMapper.selectByCondition(brand);
    //List<Brand> brands = brandMapper.selectByCondition(map);
    List<Brand> brands = brandMapper.selectByConditionSingle(brand);
    System.out.println(brands);

    //5.释放资源
    sqlSession.close();
}


@Test
public void testAdd() throws IOException {
    //接收参数
    int status = 1;
    String companyName = "波导手机";
    String brandName = "波导";
    String description = "手机中的战斗机";
    int ordered = 100;


    //封装对象
    Brand brand = new Brand();
    brand.setStatus(status);
    brand.setCompanyName(companyName);
    brand.setBrandName(brandName);
    brand.setDescription(description);
    brand.setOrdered(ordered);

    //1. 获取SqlSessionFactory
    String resource = "mybatis-config.xml";
    InputStream inputStream = Resources.getResourceAsStream(resource);
    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

    //2. 获取SqlSession对象
    SqlSession sqlSession = sqlSessionFactory.openSession();
    //SqlSession sqlSession = sqlSessionFactory.openSession(true);//提交事务是否自动

    //3. 获取Mapper接口的代理对象
    BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class);

    //4. 执行方法

    brandMapper.add(brand);

    //提交事务,注意，没有自动提交，数据库不会更新
    sqlSession.commit();

    //5. 释放资源
    sqlSession.close();

}


@Test
public void testAdd2() throws IOException {
    //接收参数
    int status = 1;
    String companyName = "波导手机";
    String brandName = "波导";
    String description = "手机中的战斗机";
    int ordered = 100;


    //封装对象
    Brand brand = new Brand();
    brand.setStatus(status);
    brand.setCompanyName(companyName);
    brand.setBrandName(brandName);
    brand.setDescription(description);
    brand.setOrdered(ordered);

    //1. 获取SqlSessionFactory
    String resource = "mybatis-config.xml";
    InputStream inputStream = Resources.getResourceAsStream(resource);
    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

    //2. 获取SqlSession对象
    SqlSession sqlSession = sqlSessionFactory.openSession();
    //SqlSession sqlSession = sqlSessionFactory.openSession(true);

    //3. 获取Mapper接口的代理对象
    BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class);

    //4. 执行方法

    brandMapper.add(brand);
    Integer id = brand.getId();
    System.out.println(id);

    //提交事务
    sqlSession.commit();

    //5. 释放资源
    sqlSession.close();

}


@Test
public void testUpdate() throws IOException {
    //接收参数
    int status = 0;
    String companyName = "波导手机";
    String brandName = "波导";
    String description = "波导手机,手机中的战斗机";
    int ordered = 200;
    int id = 4;


    //封装对象
    Brand brand = new Brand();
    brand.setStatus(status);
    brand.setCompanyName(companyName);
    brand.setBrandName(brandName);
    brand.setDescription(description);
    brand.setOrdered(ordered);
    brand.setId(id);

    //1. 获取SqlSessionFactory
    String resource = "mybatis-config.xml";
    InputStream inputStream = Resources.getResourceAsStream(resource);
    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

    //2. 获取SqlSession对象
    SqlSession sqlSession = sqlSessionFactory.openSession();
    //SqlSession sqlSession = sqlSessionFactory.openSession(true);

    //3. 获取Mapper接口的代理对象
    BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class);

    //4. 执行方法


    int count = brandMapper.update(brand);
    System.out.println(count);
    //提交事务
    sqlSession.commit();

    //5. 释放资源
    sqlSession.close();

}


@Test
public void testDeleteById() throws IOException {
    //接收参数

    int id = 5;


    //1. 获取SqlSessionFactory
    String resource = "mybatis-config.xml";
    InputStream inputStream = Resources.getResourceAsStream(resource);
    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

    //2. 获取SqlSession对象
    SqlSession sqlSession = sqlSessionFactory.openSession();
    //SqlSession sqlSession = sqlSessionFactory.openSession(true);

    //3. 获取Mapper接口的代理对象
    BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class);

    //4. 执行方法

    brandMapper.deleteById(id);

    //提交事务
    sqlSession.commit();

    //5. 释放资源
    sqlSession.close();

}


@Test
public void testDeleteByIds() throws IOException {
    //接收参数

    int[] ids = {5,7,8};


    //1. 获取SqlSessionFactory
    String resource = "mybatis-config.xml";
    InputStream inputStream = Resources.getResourceAsStream(resource);
    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

    //2. 获取SqlSession对象
    SqlSession sqlSession = sqlSessionFactory.openSession();
    //SqlSession sqlSession = sqlSessionFactory.openSession(true);

    //3. 获取Mapper接口的代理对象
    BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class);

    //4. 执行方法

    brandMapper.deleteByIds(ids);

    //提交事务
    sqlSession.commit();

    //5. 释放资源
    sqlSession.close();

}

}

标签：总结,sqlSessionFactory,String,brand,SqlSession,5.26,sqlSession,brandMapper
From： https://www.cnblogs.com/XiMenXve/p/17435887.html

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