ssm整合-编写Mybatis框架05

编写sql语句：

 

package cn.itcast.dao;

import cn.itcast.domain.Account;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;

import java.util.List;

/*
* 账户dao接口
* */
public interface AccountDao {

    // 查询所有账户信息
    @Select("select * from account")
    public List<Account> findAll();

    // 保存账户信息
    @Insert("insert into account (name,money) values (#{name},#{money})")
    public void saveAccount(Account account);
}

编写mybatis的核心配置文件：

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!--配置环境-->
    <environments default="mysql">
        <environment id="mysql">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/ssm"/>
                <property name="username" value="root"/>
                <property name="password" value="123456"/>
            </dataSource>
        </environment>
    </environments>
    
    <!--引入映射配置文件-->
    <mappers>
        <!--因为用到的是注解所以这使用的是class，如果是配置文件就是resource-->
        <!--<mapper class="cn.itcast.dao.AccountDao"></mapper>-->
        <!--扫描包下的所有接口-->
        <package name="cn.itcast"></package>
    </mappers>


</configuration>

编写测试方法：

 

 

 

package cn.itcast.test;

import cn.itcast.dao.AccountDao;
import cn.itcast.domain.Account;
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 TestMybatis {

    @Test
    public void run1() throws Exception {
        // 加载配置文件
        InputStream in = Resources.getResourceAsStream("SqlMapconfig.xml");
        // 创建SqlSessionFactory对象
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        // 创建SqlSession对象
        SqlSession session = factory.openSession();
        // 获取到代理对象
        AccountDao dao = session.getMapper(AccountDao.class);
        // 查询所有数据
        List<Account> list = dao.findAll();
        for (Account account : list) {
            System.out.println(account);
        }
        session.close();
        in.close();
    }
}