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Spring Boot概述（二）

网友: 文章列表 2024-03-22 01:40:14

Spring Boot概述（二）

1.SpringBoot整合Junit

  • 1.搭建SpringBoot工程

  • 2.引入starter-test起步依赖

    <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope>
</dependency>

  • 3.编写测试类

    @Service
public class UserService {public void add(){System.out.println("add...");}
}
    1. 添加测试相关注解 @SpringBootTest
    1. 编写测试方法
    @SpringBootTest(classes = SpringbootTestApplication.class)
//这里加不加classes取决于当前测试类包所在的位置
//在引导类所在包的子包或同级则不需要加(会自动找引导类)，否则要加
class SpringbootRedisApplicationTests {@AutowiredUserService userService;@Testvoid contextLoads() {userService.add();}
}

2.SpringBoot整合Redis

  • 1.搭建SpringBoot工程

  • 2.引入redis起步依赖

    <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
    1. 配置redis相关属性
    spring:redis:host: 127.0.0.1 #redis的主机ipport: 6379
    1. 注入RedisTemplate模板
    1. 编写测试方法，测试（记得打开本机的redis）
    @SpringBootTest
class SpringbootRedisApplicationTests {@Autowiredprivate RedisTemplate redisTemplate;@Testpublic void testSet(){//存数剧redisTemplate.boundValueOps("name").set("zhangsan");}@Test void testGet(){//获取数据Object name = redisTemplate.boundValueOps("name").get();System.out.println(name);}
}

3.SpringBoot整洁MyBatis

  • 1.搭建SpringBoot工程

  • 2.引入mybatis起步依赖，添加mysql驱动

    <dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>2.2.0</version>
</dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope>
</dependency>
    1. 编写DataSource和MyBatis相关配置

    • DataSource配置信息：

      spring:datasource:url: jdbc:mysql:///mzzusername: rootpassword: rootdriver-class-name: com.mysql.jdbc.Driver

    • 用注解开发可以不用写MyBatis的配置

    • xml开发MyBatis相关配置：

      mybatis:mapper-locations: classpath:mapper/*Mapper.xml #mapper映射文件路径type-aliases-package: com.itheima.springbootmybatis.domain #配置别名
#config-location: 指定mybatis的核心配置文件

  • 4.定义表和实体类

    USE `mzz`;DROP TABLE IF EXISTS `t_user`;CREATE TABLE `t_user` (`id` int(11) NOT NULL AUTO_INCREMENT,`username` varchar(32) COLLATE utf8mb4_unicode_ci DEFAULT NULL,`password` varchar(32) COLLATE utf8mb4_unicode_ci DEFAULT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;insert  into `t_user`(`id`,`username`,`password`) values (1,'zhangsan','123'),(2,'lisi','234');

    Spring Boot概述（二）

    @Data
@ToString
@AllArgsConstructor
@NoArgsConstructor
public class User {private Integer id;private String username;private String password;
}
    1. 编写dao和mapper文件/纯注解开发 、
      xml开发：
    @Mapper
@Repository
public interface UserXmlMapper {public List<User> findAll();
}
    <?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.springbootmybatis.mapper.UserXmlMapper"><select id="findAll" resultType="user">select * from t_user</select>
</mapper>

    纯注解开发：

    
@Mapper
@Repository//这里可加可不加，mybatis提供@Mapper可以代替
public interface UserMapper {@Select("select * from t_user")public List<User> findAll();
}

  • 6.测试

@SpringBootTest
class SpringbootMybatisApplicationTests {@Autowiredprivate UserMapper userMapper;@Autowiredprivate UserXmlMapper userXmlMapper;@Testvoid testFindAll() {List<User> res = userMapper.findAll();for (User user : res) {System.out.println(user);}}@Testvoid testFindAll1() {List<User> res = userXmlMapper.findAll();for (User user : res) {System.out.println(user);}}
}

参考视频：
https://www.bilibili.com/video/BV1Lq4y1J77x?spm_id_from=333.999.0.0

参考链接：
https://blog.csdn.net/qq_45966440/article/details/120450596?spm=1001.2014.3001.5502

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