基于Http的RPC实现

基于Http实现RPC

1.创建spring boot项目作为接收服务的服务器

1.1导入依赖

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.4.5</version>
</parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>2.4.5</version>
    </dependency>
</dependencies>

1.2配置启动器

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

1.3创建接收返回的控制层

@Controller
@ResponseBody
public class HttpServerController {
​
    @RequestMapping("demo")
    public String demo(String param){
        return param+"123";
    }
}

2.创建发送请求的服务器（一般的maven项目就可以）

2.1导入依赖

<dependencies>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.13</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/junit/junit -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
​
</dependencies>

2.2发送请求

1.上面发送get请求，下面发送post请求

public class Demo {
    @Test
    public void test01(){
        try {
            //创建http工具（理解成:浏览器） 发起请求，解析响应
            CloseableHttpClient aDefault = HttpClients.createDefault();
            //请求路径
            URIBuilder uriBuilder = new URIBuilder("http://localhost:8080/demo");
            //创建HttpGet请求对象
            HttpGet get = new HttpGet(uriBuilder.build());
            //创建响应对象
            CloseableHttpResponse execute = aDefault.execute(get);
            //由于响应体是字符串，因此把HttpEntity类型转换为字符串类型，并设置字符编码
            String s = EntityUtils.toString(execute.getEntity(), "UTF-8");
            //输出结果
            System.out.println(s);
            //释放资源
            execute.close();
            aDefault.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    @Test
    public void test1(){
        try {
            //创建对象
            CloseableHttpClient aDefault = HttpClients.createDefault();
            //创建连接
            URIBuilder builder = new URIBuilder("http://localhost:8080/demo");
            //创建post对象
            HttpPost post = new HttpPost(builder.build());
            //传递参数
            List<NameValuePair> pairs = new ArrayList<NameValuePair>();
            pairs.add(new BasicNameValuePair("param","lisi"));
            HttpEntity httpEntity = new UrlEncodedFormEntity(pairs,"utf-8");
            post.setEntity(httpEntity);
​
            CloseableHttpResponse execute = aDefault.execute(post);
​
            String s = EntityUtils.toString(execute.getEntity());
            System.out.println(s);
​
            execute.close();
            aDefault.close();
​
        }catch (Exception e){
            e.printStackTrace();
        }
​
    }
}