Web应用系统开发技术 西南石油大学 实验2 作业答案 完整工程文件 (仅供学习)

package org.example.test; import org.example.mapper.BrandMapper; import org.example.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.List; public class MyBatisTest { @Test public void testSelectAll() throws IOException { //1. 加载mybatis的核心配置文件，获取 SqlSessionFactory String resource = "mybatis-config.xml"; InputStream inputStream = Resources.getResourceAsStream(resource); SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); SqlSession sqlSession = sqlSessionFactory.openSession(); BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class); List<Brand> brands = brandMapper.selectAll(); System.out.println(brands); sqlSession.close(); } @Test public void testSelectById() throws IOException { //1. 加载mybatis的核心配置文件，获取 SqlSessionFactory int id = 1; String resource = "mybatis-config.xml"; InputStream inputStream = Resources.getResourceAsStream(resource); SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); SqlSession sqlSession = sqlSessionFactory.openSession(); BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class); Brand brand = brandMapper.selectById(id); System.out.println(brand); sqlSession.close(); } @Test public void testAdd() throws IOException { //1. 加载mybatis的核心配置文件，获取 SqlSessionFactory 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); String resource = "mybatis-config.xml"; InputStream inputStream = Resources.getResourceAsStream(resource); SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); SqlSession sqlSession = sqlSessionFactory.openSession(true); BrandMapper brandMapper = sqlSession.getMapper(BrandMapper.class); brandMapper.add(brand); sqlSession.commit(); 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 = 6; //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 = 6; //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(); } }