java如何在web应用程序中添加cookie代码
是否有任何代码可以添加到我的web应用程序中以实现cookie?这正是我在网络上可以做到的。xml和jsp中的可能?我想为登录实现cookies,但我不知道如何实现。有谁能给我具体的说明如何实施它
非常感谢您的帮助和支持
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打包我的服务
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import connect_with_my_sql_database.LoginDao;
导入javax。servlet。http。曲奇
public class Login extends HttpServlet{
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
@Override protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String n=request.getParameter("j_Username");
String p=request.getParameter("j_Password");
HttpSession session = request.getSession(false);
if(session!=null) {
session.setAttribute("Username", n);
session.setAttribute("Password", p);
}
if(LoginDao.validate(n, p)){
Cookie c1=new Cookie("j_Username",encrypt(n));//the username and passwrd are //encrypted
Cookie c2=new Cookie("j_Password",encrypt(p));
c1.setMaxAge(20000);
c2.setMaxAge(20000);
response.addCookie(c1);
response.addCookie(c2);
RequestDispatcher rd=request.getRequestDispatcher("style/success.jsp");
rd.forward(request,response);
}
else{
//out.print("<p style=\"color:red\">Sorry "+n+" or "+p+" error</p>");
RequestDispatcher rd=request.getRequestDispatcher("style/loginError.jsp");
rd.forward(request,response);
}
out.close();
}
}
# 1 楼答案
假设有一个登录名。jsp包含uname和password字段,当我们点击submit时,控件转到LoginCheck servlet。登录检查将检查用户名和密码是否正确。如果是,则创建两个cookie并将其发送到浏览器
登录。jsp
登录检查Servlet
希望这有帮助