1, 用IDE创建一个Maven项目
2, 修改pom.xml 添加依赖包
<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>test.ljb.spring</groupId>
<artifactId>spirng-cloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.1.RELEASE</version>
</parent>
<dependencies>
<!--web应用基本环境配置 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
3,创建 应用执行器和控制器
应用执行器
应用执行器由注解@SpringBootApplication实现,这个注解默认是集成了@Configuration、@EnableAutoConfiguration、@EnableWebMvc、@ComponentScan四个注解的功能
package test.ljb.spring;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
package test.ljb.spring;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@EnableAutoConfiguration
public class ExampleController {
@RequestMapping("/")
String home() {
return "Hello World!";
}
@RequestMapping("/hello/{myName}")
String index(@PathVariable String myName) {
return "Hello "+myName+"!!!";
}
}
注意!!!
controller 必须放在 Application所在包的下级或者和Application同级
否者会找不到controller 访问出现
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
4,启动应用执行器
运行Application的main方法
启动成功会在控制台看到输出。
然后访问
http://localhost:8080/
8080是默认的端口
如果需要修改端口,在src/main/resources 下加一个application.properties
添加server.port=8888(指定端口)
工程结构如下