1.springboot概念2.springboot开发流程
2.1 创建maven项目2.2 引入依赖
2.2.1 配置parent(起步依赖)2.2.2 配置业务框架2.2.3 配置版本号2.2.4 打包2.2.5 补充 2.3 项目基本结构2.4 Springboot的入口类
2.4.1@SpringBootApplication
2.4.1.1 @ComponentScan2.4.1.2 @EnableAutoConfiguration 2.5 配置banner2.6 springboot配置
2.6.1 调度2.6.2 运行环境2.6.3 测试环境2.6.4 上线环境 2.7 实体类2.8 mapper接口2.9 service类2.10 单元测试2.11 Controller类2.12 springboot处理时间问题
2.12.1 后台传输有时间2.12.2 前端传输有时间 2.13 接口测试工具Swagger3
2.13.1 引入Swagger框架2.13.2 配置swagger3
1.springboot概念The primary goals of Spring Boot are:
To provide a radically faster and widely accessible ‘getting started’ experience for all Spring development.
To be opinionated out of the box, but get out of the way quickly as requirements start to diverge from the defaults.
To provide a range of non-functional features that are common to large classes of projects (e.g. embedded servers, security, metrics, health checks, externalized configuration).
Spring Boot does not generate code and there is absolutely no requirement for XML configuration.
Spring Boot是由Pivotal团队提供的全新框架，其设计目的是用来简化新Spring应用的初始搭建以及开发过程。该框架使用了特定的方式来进行配置，从而使开发人员不再需要定义样板化的配置。通过这种方式，Spring Boot致力于在蓬勃发展的快速应用开发领域(rapid application development)成为领导者。
2.springboot开发流程 2.1 创建maven项目配置maven环境
2.2.2 配置业务框架org.springframework.boot spring-boot-starter-parent 2.5.10
2.2.3 配置版本号org.springframework.boot spring-boot-starter-web mysql mysql-connector-java ${project.mysql.version} com.alibaba druid-spring-boot-starter ${project.druid.version} org.mybatis.spring.boot mybatis-spring-boot-starter ${project.mybatis.version} org.projectlombok lombok ${project.lombok.version} org.springframework.boot spring-boot-starter-test test junit junit ${project.juint.version} test io.springfox springfox-boot-starter ${project.swagger.version}
2.2.4 打包8 8 8.0.28 1.2.8 2.2.2 1.18.22 4.12 3.0.0
org.springframework.boot spring-boot-maven-plugin
若项目已经打包完毕，则可以部署项目
倘若我们准备更换启动服务器
2.3 项目基本结构 2.4 Springboot的入口类org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-tomcat org.springframework.boot spring-boot-starter-undertow
运行main方法的类
自动化配置
package com.dyit.springboot;
import org.springframework.boot.Banner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Main {
public static void main(String[] args) {
SpringApplication sa = new SpringApplication(Main.class);
//sa.setBannerMode(Banner.Mode.OFF);
sa.run(args);
}
}
2.4.1@SpringBootApplication
@SpringBootApplication = @ComponentScan+@EnableAutoConfiguration+…
2.4.1.1 @ComponentScan2.4.1.2 @EnableAutoConfiguration扫描容器（spring容器mvc+spring）中类
@Controller/@RestController
@Service
@Repository(用在持久层的接口上，这个注解是将接口的一个实现类交给spring管理)
@Component
自动配置
2.5 配置banner${AnsiColor.BRIGHT_BLUE}
// _ooOoo_ //
// o8888888o //
// 88" . "88 //
// (| ^_^ |) //
// O = /O //
// ____/`---'____ //
// .' \| |// `. //
// / \||| : |||// //
// / _||||| -:- |||||- //
// | | \ - /// | | //
// | _| ''---/'' | | //
// .-__ `-` ___/-. / //
// ___`. .' /--.-- `. . ___ //
// ."" '< `.____<|>_/___.' >'"". //
// | | : `- `.;` _ /`;.`/ - ` : | | //
// `-. _ __ /__ _/ .-` / / //
// ========`-.____`-.________/___.-`____.-'======== //
// `=---=' //
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ //
// ${AnsiColor.BRIGHT_RED}佛祖显灵 无病无灾 财源滚滚 大吉大利 ${AnsiColor.BRIGHT_BLUE} //
启动失败问题：APPLICATION FAILED TO START
Description:
Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.
Reason: Failed to determine a suitable driver class
原因：没有配置DataSource
自动配置
解决方案：1.配置yml 2.暂时不配置DataSource
@SpringBootApplication(exclude = {
DruidDataSourceAutoConfigure.class,
DataSourceAutoConfiguration.class
})
2.6 springboot配置
2.6.1 调度
# 进行调度
spring:
profiles:
active: dev
2.6.2 运行环境
# 端口号配置，部署名称
server:
port: 8099
servlet:
context-path: /ssm
#配置数据源
spring:
datasource:
druid:
url: jdbc:mysql://localhost:3306/mybatis_db?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true
username: root
password: 123456
driver-class-name: com.mysql.cj.jdbc.Driver
#配置mybatis
mybatis:
type-aliases-package: com.dyit.springboot.entity
mapper-locations: classpath:mapper
@Configuration
public class SsmConfiguration implements WebMvcConfigurer {
@Override
public void addFormatters(FormatterRegistry registry) {
registry.addConverter(new Converter() {
@Override
@SneakyThrows
public Date convert(String source) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date d = sdf.parse(source);
return d;
}
});
}
}
日期页面
常见的错误
2.13 接口测试工具Swagger3 2.13.1 引入Swagger框架服务器返回的状态码
200—OK
400—转换问题（时间）String—>Date
404—URL错误（资源位置错误）
405—前端请求方法（GET）后台（POST）
500—后台逻辑错误（空指针错误）
2.13.2 配置swagger3io.springfox springfox-boot-starter ${project.swagger.version}
@Configuration
public class SwaggerConfiguration {
public Docket createRestApi(){
return new Docket(documentationType.OAS_30)
.apiInfo(apiInfo())
.select()
.apis(RequestHandlerSelectors.withMethodAnnotation(Operation.class))
.paths(PathSelectors.any())
.build();
}
private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title("springboot整合swagger3的接口文档")
.description("描述图书馆管理的接口文档")
.contact(new Contact("aaa","http://www.baidu.com","dyit@.com"))
.version("1.0")
.build();
}
}
@Schema(description = "dto对象")
@Data
@AllArgsConstructor
@NoArgsConstructor
public class HttpRest {
@Schema(description = "后台返回代码")
private Integer code;
@Schema(description = "后台返回信息")
private String msg;
@Schema(description = "后台返回数据")
private Object results;
@Schema(description = "后台返回数据的时间")
private Date date;
}
@RestController
@RequestMapping("/api/publisher")
@Slf4j
@Tag(name = "出版社模块")
public class PublisherController {
@Autowired
private IPublisherService ips;
@Operation(summary = "获取此出版社信息方法")
@GetMapping("/findAll")
public HttpRest findAll(){
List list = ips.findAll();
log.debug("获取所有出版社的信息");
return new HttpRest(20001,"查询出版社信息成功",list,new Date());
}
}
运行
