checkuserservlet.java

Ajax基础教程,是初学者的一个首要选择

package serv;

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

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

public class CheckUserServlet extends HttpServlet {
	public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
		request.setCharacterEncoding("utf-8");
		String name = request.getParameter("name");
		System.out.println(name);
		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();
		if("tom".equals(name)){
			out.print("该用户名已存在!");
		}else{
			out.print("该用户名可用!");
		}
		out.close();
	}
	
	public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
		doGet(request,response);
	}
}