Spring Boot 精简笔记

Posted 2020-09-28 天空之城

0. Fundamental
　　a. @SpringBootApplication
　　b. pom.xml
　　

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.RELEASE</version>
<relativePath/>
</parent>

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

　　

1. application.yml (application-dev.yml, application-prod.yml)

    spring:
      profiles:
        active: prod

    server:
        port: 8080
        content-path: /demo

    student:
      name: Peter
      age: 19
      message: My name is ${student.name}, age is ${student.age}


    spring: 
        datasource:
            driver-class-name: com.mysql.jdbc.Driver
            url: jdbc:mysql://127.0.0.1:3306/demo
            username: root
            password: 123465
        jpa:
            hibernate:
                dll-auto: update
            show-sql: true

 

2. 注入设置值
　　a. 直接使用单个值：@Value("${student.name}")
　　b. 注入配置类：
　　@ConfigurationProperties(prefix = "student")
　　@Component

3. Controller
　　a. @Controller: 处理http请求，返回模板文件名 (旧方式)
　　b. @RestController：处理请求，返回json
　　@RequestMapping: 配置URL映射
　　@GetMapping, @PutMapping, @PostMapping, @DeleteMapping
　　@PathVariable, @RequsetParam

4. Spring-Data-Jpa
　　a. @Entity
　　b. @Id
　　c. Interface class Repository (findOne,findAll,findByXXX,save)
　　d. @Service, @Transactional