1 整合Mybatis

1.1 导入依赖

• mybatis起步依赖
• mysql启动依赖

<dependencies>
     <!-- mybatis起步依赖 -->
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.2.0</version>
    </dependency>
     <!-- mysql启动 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
</dependencies>

1.2 SpringBoot配置

• 数据源配置

• mybatis相关配置

  • 加载mybatis配置文件

  • mybatis别名配置

  • 日志配置

  • 加载mapper映射文件配置文件

# 数据源配置
spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql:///你的数据库名
    username: root
    password: 1234
mybatis:
  # 加载mybatis配置文件
  # config-location: mybatis-config.xml
  #mybatis别名配置
  type-aliases-package: com.ying.springboot01.pojo
  configuration:
    #日志配置
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
    # 开启驼峰映射配置
    map-underscore-to-camel-case: true
  #加载mapper映射文件配置文件(当mapper映射文件与Mapper接口不在统一目录下需要配置)
  mapper-locations: classpath:mapper/*Mapper.xml

1.3 启动类加注解

@SpringBootApplication
@MapperScan(basePackages = "com.ying.springboot01.mapper")
public class Springboot01Application {
    public static void main(String[] args) {
        SpringApplication.run(Springboot04Application.class, args);
    }
}

1.4 编写service层代码

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;
    @Override
    public List<User> selectUsers() {        
        return userMapper.selectUsers();
    }
}

1.编写controller层代码

@RestController
@RequestMapping("users")
public class UserController {
    @Autowired
    private UserService userService;
    @GetMapping
    public List<User> selectUsers(){
        return userService.selectUsers();
    }
}

1.6 测试

http://localhost:8080/users

2 整合Druid数据源

2.1 导入依赖

<!-- druid起步依赖 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.1.10</version>
</dependency>

2.2 修改配置文件

# druid数据源配置
spring:
  datasource:
    druid:
      driver-class-name: com.mysql.jdbc.Driver
      url: jdbc:mysql:///你的数据库
      username: root
      password: 1234
      #初始化连接
      initial-size: 20
      #最大连接数量
      max-active: 
      #最小空闲连接
      min-idle: 10
      #超时等待时间
      max-wait: 00

2.3 Druid连接池后台监控

Druid连接池后台监控：http://localhost:8080/druid/index.html

3 整合单元测试

3.1 导入依赖

<!-- 单元测试起步依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>d

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <scope>test</scope>
</dependency>

3.2 编写单元测试类

@RunWith(SpringRunner.class)
@SpringBootTest
class Springboot04ApplicationTests {
    @Autowired
    UserService userService;
    @Test
    public void testUserService(){
        List<User> userList = userService.selectUsers();
        userList.forEach(System.out::println);
    }
}

4 整合 JSP

SpringBoot对JSP的支持不是很友好，所以JSP很少被使用 springboot 不支持jsp

但是需要了解

4.1 导入依赖

创建springboot-web工程

<!-- JSP核心引擎依赖 -->
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<!-- JSTL标签库（语法循环等等） -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
</dependency>

4.2 创建JSP页面

main目录下创建Java工程的webapp 文件夹

从Controller转发到jsp

4.3 springmvc前缀和后缀配置

spring
  mvc:
    view:
      prefix: /pages/
      suffix: .jsp

4.4 编写Controller

@Controller
public class TestController {
    @RequestMapping("test")
    public String test(Model model){
        model.addAttribute("msg","hello,jsp。");
        return "index";
    }
}