用springBoot构建一个RESTful web service

摘要: 从spring官网学习搭建一个RESTful web service

　WebService有两种方式，一是SOAP方式，二是REST方式。SOAP是基于XML的交互，WSDL也是一个XML文档，

　　可以使用WSDL作为SOAP的描述文件；REST是基于HTTP协议的交互，支持JSON、XML等交互，不需要WSDL。

RESTful就是http的本质，是一个资源URI，和Get，Post，Put，Delete四种操作。相当于一个接口。

1.用idea构建一个项目,然后填充pom.xml文件

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

<groupId>com.spring</groupId>
<artifactId>rest</artifactId>
<version>1.0-SNAPSHOT</version>

<!--spring-boot-starter是SpringBoot的核心启动器,包含了自动配置,日志和yaml-->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
</parent>

<dependencies>

<!--支持全栈式web开发,包括tomcat和spring-web mvc-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<!--支持常见的测试依赖,包括junit,hamcrest,spring-test模块-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>

</dependencies>

<properties>
<java.version>1.8</java.version>
</properties>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<!--maven仓库-->
<repositories>
<repository>
<id>spring-releases</id>
<url>http://repo.spring.io/libs-release</url>
</repository>
</repositories>

<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<url>http://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
</project>

2.Application.java启动springboot项目

package com.spring.rest;

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

/**
* Created by guanguan on 17/4/21.
*/
@SpringBootApplication
public class Application {

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

3.model层文件Greeting.java

package com.spring.rest;

/**
* Created by guanguan on 17/4/21.
*/
public class Greeting {
private final long id;
private final String content;
public Greeting(long id,String content){
this.id = id;
this.content = content;
}

public long getId() {
return id;
}

public String getContent() {
return content;
}
}

4.controller层GreetingController.java

import org.springframework.web.bind.annotation.RestController;

import java.util.concurrent.atomic.AtomicLong;

/**
* Created by guanguan on 17/4/21.
*/
@RestController
public class GreetingController {
private static final String template = "Hello,%s!";
private final AtomicLong counter = new AtomicLong();

@RequestMapping("/greeting")
public Greeting greeting(@RequestParam(value="name", defaultValue="World") String name) {
return new Greeting(counter.incrementAndGet(),
String.format(template, name));
}

}

5.返回结果





6.整个项目布局