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📄 cookieservlet.java

📁 达内JAVA培训-WEB课程部分项目源代码
💻 JAVA
字号:
🔍 
package cn.com.tarena.web.servlet.day4;

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

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

public class CookieServlet extends HttpServlet{
	public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
	
		//设置MINE格式
		response.setContentType("text/html");
		
		//获得能够往客户端输出HTML的书写器
		PrintWriter out = response.getWriter();
		
		out.println("<html>");
		out.println("<head>");
		out.println("	<title>Login</title>");
		out.println("</head>");
		out.println("<body>");
		out.println("<h2 align=\"center\">Login</h2>");
		out.println("<hr>");
		
		//获得客户端提交上来的所有的Cookie
		Cookie[] cookies = request.getCookies();
		
		if(cookies != null){
			//有Cookie，显示所有的cookie
			out.println("<ul>");
			
			for(int i = 0;i < cookies.length;i++){
				out.println("	<li>" + cookies[i].getName() + " = " + cookies[i].getValue() + "</li>");
			}
			
			out.println("</ul>");
		}else{
			//无Cookie，显示登陆的表单
			out.println("<form action=\"cookie\" method=\"post\">");
			out.println("	<input name=\"userName\" type=\"text\">");
			out.println("	<input name=\"password\" type=\"text\">");
			out.println("	<input type=\"submit\" value=\"login\">");
			out.println("</form>");
		}
		
		out.println("</body>");
		out.println("</html>");
		
		out.close();
	}

	public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
		
		String userName = request.getParameter("userName");
		
		String password = request.getParameter("password");
		
		//创建保存用户名的Cookie对象
		Cookie userCookie = new Cookie("userName",userName);
		
		//设置客户端浏览器保存Cookie的有效期
		userCookie.setMaxAge(60 * 60 * 24 * 365);
		
		//往客户端种保存用户名的Cookie对象
		response.addCookie(userCookie);
		
		//创建保存密码的Cookie对象
		Cookie passwordCookie = new Cookie("password",password);
		
		//往客户端种保存密码的Cookie对象
		response.addCookie(passwordCookie);
		
		//设置MINE格式
		response.setContentType("text/html");
		
		//获得能够往客户端输出HTML的书写器
		PrintWriter out = response.getWriter();
		
		out.println("<html>");
		out.println("<head>");
		out.println("	<title>Welcome</title>");
		out.println("</head>");
		out.println("<body>");
		out.println("<h2 align=\"center\">Welcome</h2>");
		out.println("<hr>");
		out.println("<a href=\"cookie\">to Login</a>");
		out.println("</body>");
		out.println("</html>");
		
		out.close();
	}

	
	
	
	
	
	
	
}

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