介绍摘自网络:
JDK6提供了一个简单的Http Server API,据此我们可以构建自己的嵌入式Http Server,它支持Http和Https协议,提供了HTTP1.1的部分实现,没有被实现的那部分可以通过扩展已有的Http Server API来实现,程序员必须自己实现HttpHandler接口,HttpServer会调用HttpHandler实现类的回调方法来处理客户端请求,在这里,我们把一个Http请求和它的响应称为一个交换,包装成HttpExchange类,HttpServer负责将HttpExchange传给HttpHandler实现类的回调方法
我想开发一个j2se的小程序,它能接受网页传来的参数,并对传来参数做些处理。我希望这个小程序即可能接受网页传过来的参数,也能接受OutputStream流传来参数,JDK6新特性能够实现。
一、提供http服务的类
package com.tdt.server.httpserver;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import com.sun.net.httpserver.spi.HttpServerProvider;
/**
* @project SimpleHttpServer
* @author sunnylocus
* @vresion 1.0 2009-9-2
* @description 自定义的http服务器
*/
public class MyHttpServer {
//启动服务,监听来自客户端的请求
public static void httpserverService() throws IOException {
HttpServerProvider provider = HttpServerProvider.provider();
HttpServer httpserver =provider.createHttpServer(new InetSocketAddress(6666), 100);//监听端口6666,能同时接 受100个请求
httpserver.createContext("/myApp", new MyHttpHandler());
httpserver.setExecutor(null);
httpserver.start();
System.out.println("server started");
}
//Http请求处理类
static class MyHttpHandler implements HttpHandler {
public void handle(HttpExchange httpExchange) throws IOException {
String responseMsg = "ok"; //响应信息
InputStream in = httpExchange.getRequestBody(); //获得输入流
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String temp = null;
while((temp = reader.readLine()) != null) {
System.out.println("client request:"+temp);
}
httpExchange.sendResponseHeaders(200, responseMsg.length()); //设置响应头属性及响应信息的长度
OutputStream out = httpExchange.getResponseBody(); //获得输出流
out.write(responseMsg.getBytes());
out.flush();
httpExchange.close();
}
}
public static void main(String[] args) throws IOException {
httpserverService();
}
}
二、测试类
package com.tdt.server.test;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/**
* @project SimpleHttpServer
* @author sunnylocus
* @vresion 1.0 2009-9-2
* @description 测试类
*/
public class Test {
public static void main(String[] args) {
ExecutorService exec = Executors.newCachedThreadPool();
// 测试并发对MyHttpServer的影响
for (int i = 0; i < 20; i++) {
Runnable run = new Runnable() {
public void run() {
try {
startWork();
} catch (IOException e) {
e.printStackTrace();
}
}
};
exec.execute(run);
}
exec.shutdown();// 关闭线程池
}
public static void startWork() throws IOException {
URL url = new URL("http://127.0.0.1:6666/myApp");
HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
urlConn.setDoOutput(true);
urlConn.setDoInput(true);
urlConn.setRequestMethod("POST");
// 测试内容包
String teststr = "this is a test message";
OutputStream out = urlConn.getOutputStream();
out.write(teststr.getBytes());
out.flush();
while (urlConn.getContentLength() != -1) {
if (urlConn.getResponseCode() == 200) {
InputStream in = urlConn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String temp = "";
while ((temp = reader.readLine()) != null) {
System.err.println("server response:" + temp);// 打印收到的信息
}
reader.close();
in.close();
urlConn.disconnect();
}
}
}
}
注意:经过我测试发现httpExchange.sendResponseHeaders(200, responseMsg.length())有bug,如果responseMsg里面包含中文的话,客户端不会收到任何信息,因为一个汉字用二个字节表示。
应修改为:
httpExchange.sendResponseHeaders(HttpURLConnection.HTTP_OK, responseMsg.getBytes().length);
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