java实现Ajax程序例子（运用Servlet和JSP）五 例子源码 Servlet部分

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 class NameAndSchool extends HttpServlet {

    protected void processRequest(HttpServletRequest request,
            HttpServletResponse response, String method)
            throws ServletException, IOException {
                //把响应内容类型设置为 text/xml
                response.setContentType("text/xml");
                //得到用户参数值
                String firstName = request.getParameter("firstName");
                String middleName = request.getParameter("middleName");
                String birthday = request.getParameter("birthday");
               //生成包含用户参数值的返回字符串
                String responseText = "Hello " + firstName + " " + middleName
                + ". Your birthday is " + birthday + "."
                + " [Method: " + method + "]";
                //写回浏览器
                System.out.print("cao!");
                PrintWriter out = response.getWriter();
                out.println(responseText);
                out.close();
            }
            protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
                //Get主函数调用processRequest,完成Get方法的参数接受，返回的过程
                processRequest(request, response, "GET");
            }
            protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
                //POST主函数调用processRequest,完成POST方法的参数接受，返回的过程
                processRequest(request, response, "POST");
            }
}

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