Spring Boot 最簡單的HelloWorld

創建一個Spring Boot，可以直接使用構建工具（Maven或Gradle）創建，也可以使用spring.io網站創建，一般會選擇使用spring.io創建

 

使用IDEA創建一個Spring Boot項目過程如下

 填寫合適的項目信息

 選擇Spring Boot需要支持的模塊

 

pom.xml

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelVersion>4.0.0</modelVersion>

 <groupId>com.zln.sb</groupId>
 <artifactId>sb-helloworld</artifactId>
 <version>1.0-SNAPSHOT</version>

 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>1.5.1.RELEASE</version>
 <relativePath/>
 </parent>

 <properties>
 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 <java.version>1.8</java.version>
 </properties>
 <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>
 <build>
 <plugins>
 <plugin>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-maven-plugin</artifactId>
 <configuration>
 <fork>true</fork>
 </configuration>
 </plugin>
 </plugins>
 </build>


</project>




啟動類

package com.zln.sb;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * Created by sherry on 17/2/20.
 */

@SpringBootApplication
public class SbApplication {
 public static void main(String[] args) {
 SpringApplication.run(SbApplication.class, args);
 }
}




HelloWorld控制器

package com.zln.sb.c;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by sherry on 17/2/20.
 */
@RestController
public class HelloWorld {

 /**
 * 日志
 */
 private Logger logger = LoggerFactory.getLogger(HelloWorld.class);

 @RequestMapping("/")
 public String helloworld(){
 return "Hello World 呵呵";
 }

}




啟動SbApplication后，直接在瀏覽器輸入 http://localhost:8080，出現

 

 

 

HelloWorld創建完畢

 

 

 

如果將控制器和啟動類寫在一起，那代碼就更簡單的。至於怎么實現的，在以后涉及到Spring Boot原理的講解中會詳細說明