我正在编写基于Java的Java线程池服务器用于学习目的;使用HttpServer和HttpHandler类。无法发送POST请求到服务器
服务器类有它的run方法,像这样:
@Override
public void run() {
try {
executor = Executors.newFixedThreadPool(10);
httpServer = HttpServer.create(new InetSocketAddress(port), 0);
httpServer.createContext("/start", new StartHandler());
httpServer.createContext("/stop", new StopHandler());
httpServer.setExecutor(executor);
httpServer.start();
} catch (Throwable t) {
}
}
的StartHandler类,它实现的HttpHandler,在Web浏览器中键入http://localhost:8080/start时提供了一个HTML页面。 HTML页面是:
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Thread Pooled Server Start</title>
<script type="text/javascript">
function btnClicked() {
var http = new XMLHttpRequest();
var url = "http://localhost:8080//stop";
var params = "abc=def&ghi=jkl";
http.open("POST", url, true);
//Send the proper header information along with the request
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", params.length);
http.setRequestHeader("Connection", "close");
http.onreadystatechange = function() {//Call a function when the state changes.
if(http.readyState == 4 && http.status == 200) {
alert(http.responseText);
}
}
http.send(params);
}
</script>
</head>
<body>
<button type="button" onclick="btnClicked()">Stop Server</button>
</body>
</html>
基本上,上述HTML文件中包含的单个按钮,点击它时被认为对URL http://localhost:8080/stop(对于StopHandler上下文以上)发送POST请求到服务器。
StopHandler类也实现了HttpHandler,但是我没有看到StopHandler的handle()函数在按钮点击(我没有执行它的System.out.println)时被调用。据我所知,由于上述html页面的按钮点击发送一个POST请求到上下文http://localhost:8080/stop设置为StopHandler,它不应该是执行handle()函数吗?当我尝试通过Web浏览器执行http://localhost:8080/stop时,StopHandler的handle()函数被调用。
谢谢你的时间。