1、系统要求
- Java 8 & 兼容java14 .
- Maven 3.3+
- idea 2019.1.2
1.1、maven设置 设置阿里镜像和jdk1.8
<mirrors>
<mirror>
<id>nexus-aliyun</id>
<mirrorOf>central</mirrorOf>
<name>Nexus aliyun</name>
<url>http://maven.aliyun.com/nexus/content/groups/public</url>
</mirror>
</mirrors>
<profiles>
<profile>
<id>jdk-1.8</id>
<activation>
<activeByDefault>true</activeByDefault>
<jdk>1.8</jdk>
</activation>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
</properties>
</profile>
</profiles>
2、HelloWorld
需求:浏览发送/hello请求,响应 Hello,Spring Boot 2
2.1、创建maven工程
2.2、引入依赖
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.4.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
2.3、创建主程序
/**
* 主程序类
* @SpringBootApplication:这是一个SpringBoot应用
*/
@SpringBootApplication
public class MainApplication {
public static void main(String[] args) {
// 返回对象为ConfigurableApplicationContext
SpringApplication.run(MainApplication.class,args);
}
}
2.4、编写业务
@RestController // @RestController == @Controller+@ResponseBody
public class HelloController {
@RequestMapping("/hello")
public String handle01(){
return "Hello, Spring Boot 2!";
}
}
2.5、测试
2.6、简化配置
application.properties(path resources/application.properties)
server.port=8888
2.7、简化部署
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
把项目(包括依赖包和环境)打成jar包,直接在目标服务器执行即可。
通过maven打包成jar包,然后可以用java -jar xxxx.jar运行