SpringBoot 精简笔记
0. Fundamental
a. @SpringBootApplication //启动类
b. pom.xml //Maven基本依赖
<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 //设置激活的profile名字 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:
@Component
@ConfigurationProperties(prefix = "student") //一系列配置属性的前缀
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 //e.g. /hello/{id}
@RequsetParam //e.g. ?name=Peter
4. Spring-Data-Jpa
a. @Entity;
b. @Id (添加annotation @GeneratedValue 来产生自动增长的id值);
c. Interface class Repository (findOne,findAll,findByXXX,save);
d. @Service;
e. @Transactional;
5. Validation
a. @Min(value=18, message="Less than minimum value."), 最小值,添加到@Entity的property上。
b. @Valid, BindingResult bindingResult, 绑定验证结果到变量中,如果bindingResult.hasErrors()非空,则获取错误信息:bindingResult.getFieldError()。
6. AOP
a. 添加依赖 spring-boot-starter-aop;
b. @Aspect, @Component;
c. @Pointcut, @Before, @After;
d. 参数注入:JointPoint,@AfterReturning(returning = "object", pointcut = "log()");
7. 统一异常处理
a. @ControllerAdvice, @ExceptionHandler;
b. Self-defined exception, to extend RuntimeException;
c. Self-defined Enum, to list out all the exception cases;
8. 单元测试
a. @RunWith(SpringRunner.class), @SpringBootTest(classes = Application.class), @ActiveProfiles("test");
b. @AutoConfigureMockMvc =>
@Autowired
MockMvc mvc;
mvc.perform(MockMvcRequestBuilders.get("/api")).andExpect(MockMvcResultMatchers.status.isOk());