整合mybatis
首先,展示整合后的目录:
添加Mybatis的起步依赖
<!--mybatis起步依赖--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.0</version> </dependency>
添加数据库驱动坐标
<!--mysql连接驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency>
添加数据库连接信息
在application.properties中添加数据量的连接信息
#数据库配置信息 spring.datasource.driverClassCame=com.mysql.jdbc.Driver spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8 spring.datasource.username=root spring.datasource.password=123456
注意:因为使用了Mysql Connector/J 6.x以上的版本,然后就会报时区的错误,所以url中要加入 serverTimezone=UTC。
在test数据库中创建user表
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(50) DEFAULT NULL,
`password` varchar(50) DEFAULT NULL,
`name` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
-- ----------------------------- Records of user -- ---------------------------
INSERT INTO `user` VALUES ('1', 'zhangsan', '123', '张三');
INSERT INTO `user` VALUES ('2', 'lisi', '123', '李四');
创建实体Bean
public class User { private Integer id; private String username; private String password; private String name; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "User{" + "id=" + id + ", username='" + username + '\'' + ", password='" + password + '\'' + ", name='" + name + '\'' + '}'; } }
编写Mapper
@Mapper public interface UserMapper { public List<User> queryUserList(); }
注意:@Mapper标记该类是一个mybatis的mapper接口,可以被spring boot自动扫描到spring上下文中
配置Mapper映射文件
在src\main\resources\mapper路径下加入UserMapper.xml配置文件"
<?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="com.itheima.mapper.UserMapper"> <select id="queryUserList" resultType="user"> select * from user </select> </mapper>
在application.properties中添加mybatis的信息
#spring集成Mybatis环境
#pojo别名扫描包
mybatis.type-aliases-package=com.itheima.domain
#加载Mybatis映射文件
mybatis.mapper-locations=classpath:mapper/*Mapper.xml
编写测试Controller
@Controller public class MybatisController { @Autowired private UserMapper userMapper; @RequestMapping("/mybatis") @ResponseBody public List<User> queryUserList(){ List<User> users = userMapper.queryUserList(); return users; } }
测试
整合junit
添加Junit的起步依赖
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency>
编写测试类
import com.itheima.domain.User; import com.itheima.mapper.UserMapper; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; import java.util.List; @RunWith(SpringRunner.class)//使用springrunner类执行 @SpringBootTest(classes = SpringbootMybatisApplication.class) public class MybatisTest { @Autowired private UserMapper userMapper; @Test public void test(){ List<User> users = userMapper.queryUserList(); System.out.println(users); } }
其中,SpringRunner继承自SpringJUnit4ClassRunner,使用哪一个Spring提供的测试引擎都可以
public final class SpringRunner extends SpringJUnit4ClassRunner
@SpringBootTest的属性指定的是引导类的字节码对象
控制台打印结果: