package ajax.servlet;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class PreServlet extends HttpServlet
{
public String[] usernameList;
public void doGet(HttpServletRequest request,HttpServletResponse response)throws IOException,ServletException
{
response.setContentType("text/xml");
response.setHeader("Cache-Control","no-cache");
String username=(String)request.getParameter("user_name");
String xml="<?xml version=\"1.0\" encoding=\"gb2312\"?>";
if(username.equals("")||username==null)
{
xml+="<message><info>请需入用户名!</info></message>";
}
else if(this.IsContain(username))
{
xml+="<message><info>用户名已存在,请重新输入!</info></message>";
}
else
{
xml+="<message><info>用户名可以使用!</info></message>";
}
response.getWriter().write(xml);
}
public void doPost(HttpServletRequest request,HttpServletResponse response)throws IOException,ServletException
{
doGet(request,response);
}
public void init(ServletConfig config)throws ServletException
{
usernameList=new String[]{"Tom","Jerry","Brain"};
}
private boolean IsContain(String param)
{
for(int i=0;i<usernameList.length;i++)
{
if(usernameList[i].equals(param))
{
return true;
}
return false;
}
return false;
}
}
评论0