Mybatis-Spring项目编写测试类

因为想看一下mybatis-Spring项目的代码，所有从github上将源码下载下来了，我看了一下，可能是测试类太多了，就没有细找入口类，所以自己写了一个主入口类，特此记录（我本地已经安装Mysql数据库）

首先项目没有数据库驱动，所以添加一下

<dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.34</version>
    </dependency>

然后添加mapper接口类

package org.mybatis.spring.demo.mapper;

public interface DemoMapper {

   String getById();
}

添加对应的xml文件，在resource/mapper/目录下

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="org.mybatis.spring.demo.mapper.DemoMapper">


  <select id="getById" resultType="String">
    SELECT stu_id FROM record WHERE id = 1
  </select>

</mapper>

最后添加一个配置类

package org.mybatis.spring.demo;

import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

import javax.sql.DataSource;


@Configuration
@MapperScan("org.mybatis.spring.demo.mapper")
public class DemoConfig {

  ResourcePatternResolver resourceResolver = new PathMatchingResourcePatternResolver();

  @Bean
  public SqlSessionFactoryBean getSqlSessionFactoryBean(@Autowired DataSource dataSource) throws Exception{
    SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
    bean.setDataSource(dataSource);
    Resource[] resources = resourceResolver.getResources("mapper/*.xml");
    bean.setMapperLocations(resources);
    return bean;
  }

  @Bean
  public DataSource dataSource(){
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName("com.mysql.jdbc.Driver");
    dataSource.setUrl("jdbc:mysql://localhost:3306/test");
    dataSource.setUsername("root");
    dataSource.setPassword("root");
    return dataSource;

  }

}

添加一个主类做一下测试即可

package org.mybatis.spring;

import org.mybatis.spring.demo.DemoConfig;
import org.mybatis.spring.demo.mapper.DemoMapper;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;


public class Main {

  public static void main(String[] args) {
    AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(DemoConfig.class);
    DemoMapper bean = context.getBean(DemoMapper.class);
    System.out.println(bean.getById());
    System.out.println(bean.toString());



  }
}

整体添加的目录结构是这样的

结束。