mybatis 入门优化

在上一节《mybatis快速入门》的基础上对IWebUserDao的实现类进行了优化，暂时命名为WebUserDaoMybatis2.java

package com.mozi.dao.impl;
 
import java.util.List;
 
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
 
import com.mozi.dao.IWebUserDao;
import com.mozi.entity.WebUser;
 
public class WebUserDaoMybatis2 implements IWebUserDao {
    private SqlSessionFactory sqlSessionFactory;
    // 需要向dao实现类中注入SqlSessionFactory
    // 通过构造方法注入
    public WebUserDaoMybatis2(SqlSessionFactory sqlSessionFactory) {
        this.sqlSessionFactory = sqlSessionFactory;
    }
 
    @Override
    public List<WebUser> findUserByName(String username) {
        SqlSession sqlSession = sqlSessionFactory.openSession();
        List<WebUser> list = sqlSession
                .selectList("src.main.resource.userMapper.findUserByName", username);
 
        // 提交事务
        sqlSession.commit();
        // 释放资源
        sqlSession.close();
        return list;
    }
 
    @Override
    public void insertUser(WebUser user) {
        SqlSession sqlSession = sqlSessionFactory.openSession();
        // 执行插入操作
        sqlSession.insert("src.main.resource.userMapper.insertUser", user);
        // 提交事务
        sqlSession.commit();
        // 释放资源
        sqlSession.close();
    }
 
    @Override
    public void deleteUser(String id) {
        SqlSession sqlSession = sqlSessionFactory.openSession();
        // 执行插入操作
        sqlSession.delete("src.main.resource.userMapper.deleteUser", id);
        // 提交事务
        sqlSession.commit();
        // 释放资源
        sqlSession.close();
    }
 
    @Override
    public void updateUser(WebUser user) {
        SqlSession sqlSession = sqlSessionFactory.openSession();
        // 执行插入操作
        sqlSession.update("src.main.resource.userMapper.updateUser", user);
        // 提交事务
        sqlSession.commit();
        // 释放资源
        sqlSession.close();
    }
 
}

添加测试类 WebUserDaoImplTest.java

package com.mozi.test.java;
 
import static org.junit.Assert.*;
 
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
 
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test;
 
import com.mozi.dao.IWebUserDao;
import com.mozi.dao.impl.WebUserDaoJdbc;import com.mozi.dao.impl.WebUserDaoMybatis2;import com.mozi.entity.WebUser;
 
public class WebUserDaoImplTest {
 
    private static SqlSessionFactory sqlSessionFactory = null;
 
    private static IWebUserDao dao = null;
 
    static{
        String resource = "SqlMapConfig.xml";
        InputStream inputStream = null;
        try {
            inputStream = Resources.getResourceAsStream(resource);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        dao = new WebUserDaoMybatis2(sqlSessionFactory);
    }
 
    @Test
    public void findUserByName() {
        List<WebUser> userList = dao.findUserByName("aa");
        System.out.println(userList);
        assertNotNull(userList);
    }
 
    @Test
    public void insertUser() {
        WebUser user = new WebUser();
        user.setName("5");
        user.setTrueName("lisi");
        user.setPass("5");
        dao.insertUser(user);
    }
 
    @Test
    public void deleteUser() {
        dao.deleteUser("5");
    }
 
    @Test
    public void updateUser() {
        WebUser user = new WebUser();
        user.setName("5");
        user.setTrueName("lisi");
        user.setPass("666");
 
        dao.updateUser(user);
    }
}