📄 greetservlet2.java
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package org.sunxin.lesson.jsp.ch09;
import javax.servlet.*;
import java.io.*;
import javax.servlet.http.*;
public class GreetServlet2 extends HttpServlet
{
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException,IOException
{
Cookie[] cookies=req.getCookies();
if(null!=cookies && cookies.length!=0)
{
String name=null;
String pwd=null;
for(int i=0;i<cookies.length;i++)
{
Cookie cookie=cookies[i];
String cName=cookie.getName();
if(cName.equals("userinfo"))
{
String cValue=cookie.getValue();
String[] userInfo=cValue.split("&");
for(int j=0;j<userInfo.length;j++)
{
String[] value=userInfo[j].split("=");
if(value[0].equals("username"))
{
name=value[1];
}
if(value[0].equals("password"))
{
pwd=value[1];
}
}
}
}
if("zhangsan".equals(name) && "1234".equals(pwd))
{
resp.setContentType("text/html;charset=gb2312");
PrintWriter out=resp.getWriter();
out.println("<html>");
out.println("<meta http-equiv=\"Pragma\" content=\"no-cache\">");
out.println("<head><title>欢迎页面</title></head>");
out.println("<body>");
out.println(name+",欢迎你");
out.println("<a href=login2>重新登录</a>");
out.println("</body></html>");
out.close();
return;
}
}
RequestDispatcher rd=req.getRequestDispatcher("login2");
rd.forward(req,resp);
}
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