districtservlet.java

关于Ajax的

package allan.ajax.action;

import java.io.IOException;
import java.io.PrintWriter;

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

public abstract class DistrictServlet extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String zipcode = request.getParameter("zipcode");
        response.setHeader("Cache-Control", "no-cache");
        response.setContentType(getContentType());
        PrintWriter out = response.getWriter();
        out.write(getInfo(zipcode));
        out.flush();
        out.close();
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

    protected abstract String getInfo(String zipcode);

    protected String getContentType() {
        return "text/xml;charset=gbk";
    }
}