我试图让一个Java Servlet发送一些HTML作为对来自JavaScript函数的请求的响应。但是,虽然servlet函数正在调用并似乎在发送响应,但JavaScript函数只是一个空字符串。Java servlet对JavaScript的响应
这里是Servlet方法:
String type = request.getParameter("type");
if(type.equals("locos")) {
response.setContentType("text/html");
//this prints out
System.out.println("Responding with vehicle list");
//deal with response
PrintWriter out = response.getWriter();
out.write("<p>test response</p>"); //finish
}
这里是JavaScript函数:
this.updateVehicleList = function() {
var type = "locos";
var xhr = new XMLHttpRequest();
xhr.open('GET', 'GetList?type=' + encodeURIComponent(type),true);
xhr.send(null);
//deal with response
var res = xhr.responseText;
//for testing
if (res == "") {
window.alert("I'm getting nothing");
}
view.showVehicleList(res);
};
的 “我得到什么” 的消息,每次输出。我如何让JavaScript实际接收Servlet的响应?
相关:[?如何使用Servlet和阿贾克斯(http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax) – BalusC