Spring Boot Building a RESTful Web Service

2018-07-05

创建项目

idea -> new project -> Spring Initializr -> check web/web dependency -> finish

创建VO

package com.sora.rest;

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;
    }
}

创建Controller

package com.sora.rest;

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

import java.util.concurrent.atomic.AtomicLong;

@RestController
public class GreetingController {
    private static final String template = "Hello, %s! Your id is %s";

    private final AtomicLong counter = new AtomicLong();

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

调试

Press Option + Control + D ，编辑配置，如图所示

configuration

再次按下 Option + Control + D ，选择刚才配置的spring boot，启动。

构建

打开终端，进入项目目录，执行 ./mvnw clean package

部署执行

安装jre

1	yum install java-1.8.0-openjdk

将 target 目录下的 jar 文件copy至服务器，执行 java -jar xxxx.jar即可。

1 2	scp target/xxx.jar user@ip:xxx.jar java -jar xxx.jar

Summery

创建REST项目需要添加 spring-boot-starter-web 依赖

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
</dependency>

通过注解的方式关联API请求

@RestController

// 映射路径，方法，默认值等
@RequestMapping
@GetMapping
@PostMapping
@PutMapping
@DeleteMapping

// 映射参数
@RequestParam
@RequestBody

// 映射返回值
@ResponseBody

Refs

-How to install Java on CentOS 7
-Building a RESTful Web Service