ajax异步：jsp无法传输数据到Servlet？？？？ - 编程论坛

jsp代码

程序代码：

<%@ page pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>省会查询</title>
</head>
<body>
<script>
function ajaxProcess(obj)
{
    var xhr = new XMLHttpRequest();
    var text=obj.value;
    var url="ajax/ajaxServlet?text="+text;

    xhr.onreadystatechange=function()
    {
        if(xhr.readyState==4&&xhr.status==200)
        {
        doucment.getElementById("provincial_captial").value=xhr.responseText;
        }
    };

    xhr.open("GET",url,true);
    xhr.send();


}
</script>
<h1>获取省份对应的省会信息</h1>
<label>输入省份</label><input type="text" id="province" onblur="ajaxProcess(this)">
<br><br>
<label>对应省会</label><input type="text" id="provincial_capital">

</body>
</html>

ajaxServlet.java

程序代码：

package ajax;

import import import java.util.HashMap;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ajaxServlet extends HttpServlet
{
    private static final long serialVersionUID = 1L;


    public ajaxServlet()
    {
        super();

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
    {
        Map<String,String> map = new HashMap<String,String>();
        map.put("上海市","上海");
        map.put("湖北省","武汉");
        PrintWriter out = response.getWriter();
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");

        String text = request.getParameter("text");
        out.print(text);
        out.print("<br>");
        String provincial_captial = map.get(text);

        if(provincial_captial==null)
        {
            out.print("Error");
        }
        else
        {
            out.print(provincial_captial);
        }
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
    {

        doGet(request, response);
    }

}

确认过了，input的值在没有传过去？是url有问题吗？？