赞
踩
目录
SpringBoot是由Pivotal团队提供的全新框架,其设计目的是用来简化Spring应用的初始搭建以及开发过程
(1)创建新模块,选择Spring初始化,并配置模块相关基础信息
(2)选择当前模块需要使用的技术集
(3)开发控制器类
- @RestController
- @RequestMapping("/books")
- public class BookController {
- @GetMapping("/{id}")
- public String getById(@PathVariable Integer id) {
- System.out.println(id);
- return "hello , spring boot! ";
- }
- }
(4)运行自动生成的Application类
-最简SpringBoot程序所包含的基础文件
- <?xml version="1.0" encoding="UTF-8"?>
- <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
- <modelVersion>4.0.0</modelVersion>
- <parent>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-parent</artifactId>
- <version>2.5.0</version>
- </parent>
- <groupId>com.itheima</groupId>
- <artifactId>springboot-01-quickstart</artifactId>
- <version>0.0.1-SNAPSHOT</version>
- <dependencies>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-web</artifactId>
- </dependency>
- </dependencies>
- </project>
- @SpringBootApplication
- public class Application {
- public static void main(String[] args) {
- SpringApplication.run(Application.class, args);
- }
- }
-Spring程序与SpringBoot程序对比
**基于idea开发SpringBoot程序需要确保联网且能够加载到程序框架结构**
1、对SpringBoot项目打包(执行Maven构建指令package)
2、执行启动指令
java -jar springboot_01_quickstart.jar # 项目的名称根据实际情况修改
注意事项:
jar支持命令行启动需要依赖maven插件支持,请确认打包时是否具有SpringBoot对应的maven插件
- <build>
- <plugins>
- <plugin>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-maven-plugin</artifactId>
- </plugin>
- </plugins>
- </build>
(1)SpringBoot是由Pivotal团队提供的全新框架,其设计目的是用来简化Spring应用的初始搭建以及开发过程
(2)Spring程序缺点
配置繁琐
依赖设置繁琐
(3)SpringBoot程序优点
自动配置
起步依赖(简化依赖配置)
辅助功能(内置服务器,……)
(1)starter
SpringBoot中常见项目名称,定义了当前项目使用的所有项目坐标,以达到减少依赖配置的目的
- <?xml version="1.0" encoding="UTF-8"?>
- <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
- <modelVersion>4.0.0</modelVersion>
- <parent>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-parent</artifactId>
- <version>2.5.0</version>
- </parent>
- <groupId>com.itheima</groupId>
- <artifactId>springboot-01-quickstart</artifactId>
- <version>0.0.1-SNAPSHOT</version>
- <dependencies>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-web</artifactId>
- </dependency>
- </dependencies>
- </project>
- <project xmlns="http://maven.apache.org/POM/4.0.0"
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- <modelVersion>4.0.0</modelVersion>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-dependencies</artifactId>
- <version>2.5.0</version>
- <packaging>pom</packaging>
- <properties>
- <servlet-api.version>4.0.1</servlet-api.version>
- ...
- </properties>
- </project>
(2)parent
所有SpringBoot项目要继承的项目,定义了若干个坐标版本号(依赖管理,而非依赖),以达到减少依赖冲突的目的
spring-boot-starter-parent(2.5.0)与 spring-boot-starter-parent(2.4.6)共计57处坐标版本不同
- <?xml version="1.0" encoding="UTF-8"?>
- <project xmlns="http://maven.apache.org/POM/4.0.0"
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- <modelVersion>4.0.0</modelVersion>
- <parent>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-dependencies</artifactId>
- <version>2.5.0</version>
- </parent>
- <artifactId>spring-boot-starter-parent</artifactId>
- <packaging>pom</packaging>
- ...
- </project>
(3)实际开发
使用任意坐标时,仅书写GAV中的G和A,V由SpringBoot提供
如发生坐标错误,再指定version(要小心版本冲突)
- <dependency>
- <groupId>junit</groupId>
- <artifactId>junit</artifactId>
- <version>${junit.version}</version>
- </dependency>
- <dependency>
- <groupId>javax.servlet</groupId>
- <artifactId>javax.servlet-api</artifactId>
- <version>${servlet-api.version}</version>
- </dependency>
- <?xml version="1.0" encoding="UTF-8"?>
- <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
- <parent>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-parent</artifactId>
- <version>2.5.0</version>
- </parent>
- <dependencies>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-web</artifactId>
- </dependency>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-test</artifactId>
- <scope>test</scope>
- </dependency>
- </dependencies>
- </project>
SpringBoot程序启动
- @SpringBootApplication
- public class Springboot01QuickstartApplication {
- public static void main(String[] args) {
- SpringApplication.run(Springboot01QuickstartApplication.class, args);
- }
- }
SpringBoot在创建项目时,采用jar的打包方式
SpringBoot的引导类是项目的入口,运行main方法就可以启动项目
使用maven依赖管理变更起步依赖项
Jetty比Tomcat更轻量级,可扩展性更强(相较于Tomcat),谷歌应用引擎(GAE)已经全面切换为Jetty
- <dependencies>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-web</artifactId>
- <!--web起步依赖环境中,排除Tomcat起步依赖-->
- <exclusions>
- <exclusion>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-tomcat</artifactId>
- </exclusion>
- </exclusions>
- </dependency>
- <!--添加Jetty起步依赖,版本由SpringBoot的starter控制-->
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-jetty</artifactId>
- </dependency>
- </dependencies>
Copyright © 2003-2013 www.wpsshop.cn 版权所有,并保留所有权利。