java-实现一个简单的httpserver-0.5.0

背景

通常写了一些接口,需要通过临时的http访问,又不需要spring这么厚重的框架

功能

  1. 设置并发
  2. 监控并发
  3. 两个get请求一个是根路径,一个是other

具体代码

java 复制代码
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

public class server {
    private static AtomicInteger concurrentConnections = new AtomicInteger(0);

    public static void main(String[] args) throws IOException {
        HttpServer server = HttpServer.create(new InetSocketAddress("localhost", 8222), 0);

        // 处理根路径请求
        server.createContext("/", new RootHandler());

        // 处理 /other 路径请求
        server.createContext("/other", new OtherHandler());

        // 设置并发连接数
        server.setExecutor(java.util.concurrent.Executors.newFixedThreadPool(10));

        server.start();
        System.out.println("Server started on port 8000.");

        // 定期打印当前并发连接数
        new Thread(() -> {
            while (true) {
                try {
                    Thread.sleep(5000);
                    System.out.println("Current concurrent connections: " + concurrentConnections.get());
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                }
            }
        }).start();
    }

    static class RootHandler implements HttpHandler {
        @Override
        public void handle(HttpExchange exchange) throws IOException {
            concurrentConnections.incrementAndGet();

            String response = "Hello from root path!";
            exchange.sendResponseHeaders(200, response.length());
            OutputStream os = exchange.getResponseBody();
            os.write(response.getBytes());
            os.close();
            // 监控连接释放事件
            System.out.println("root Connection released");

            concurrentConnections.decrementAndGet();
        }
    }

    static class OtherHandler implements HttpHandler {
        @Override
        public void handle(HttpExchange exchange) throws IOException {
            concurrentConnections.incrementAndGet();

            String response = "This is a response for /other path.";
            exchange.sendResponseHeaders(200, response.length());
            OutputStream os = exchange.getResponseBody();
            os.write(response.getBytes());
            os.close();

            // 监控连接释放事件
            System.out.println("/other Connection released");
            concurrentConnections.decrementAndGet();
        }
    }
}

打印

java 复制代码
root Connection released
Current concurrent connections: 0
/other Connection released
root Connection released
/other Connection released
/other Connection released
/other Connection released
/other Connection released
/other Connection released
Current concurrent connections: 0
/other Connection released
/other Connection released
/other Connection released
root Connection released
Current concurrent connections: 0
Current concurrent connections: 0
相关推荐
Grey Zeng2 小时前
Java SE 25新增特性
java·jdk·jdk新特性·jdk25
雨白3 小时前
Java 线程通信基础:interrupt、wait 和 notifyAll 详解
android·java
TF男孩3 小时前
ARQ:一款低成本的消息队列,实现每秒万级吞吐
后端·python·消息队列
架构师沉默7 小时前
设计多租户 SaaS 系统,如何做到数据隔离 & 资源配额?
java·后端·架构
该用户已不存在8 小时前
Mojo vs Python vs Rust: 2025年搞AI,该学哪个?
后端·python·rust
Java中文社群8 小时前
重要:Java25正式发布(长期支持版)!
java·后端·面试
每天进步一点_JL9 小时前
JVM 类加载:双亲委派机制
java·后端
站大爷IP10 小时前
Java调用Python的5种实用方案:从简单到进阶的全场景解析
python
用户2986985301410 小时前
Java HTML 转 Word 完整指南
java·后端
渣哥10 小时前
原来公平锁和非公平锁差别这么大
java