Cookie_Servlet.java:
package servlet_pack; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Servlet implementation class Cookie_Servlet */ @WebServlet("/Cookie_Servlet") public class Cookie_Servlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public Cookie_Servlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Cookie c = new Cookie("username", "admin"); // 创建一个Cookie，name=username，value=admin c.setMaxAge(60*60*24); // 设置Cookie的存活时间，单位是秒 response.addCookie(c); // 将Cookie添加到响应中 response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.print("<!DOCTYPE html>"); out.print("<html>"); out.print("<head>"); out.print("<title>A Servlet</title>"); out.print("</head>"); out.print("<body>"); out.print("Cookie set success"); out.print("</body>"); out.print("</html>"); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
TestCookie.java:
1 package servlet_pack; 2 3 import java.io.IOException; 4 import java.io.PrintWriter; 5 6 import javax.servlet.ServletException; 7 import javax.servlet.annotation.WebServlet; 8 import javax.servlet.http.Cookie; 9 import javax.servlet.http.HttpServlet; 10 import javax.servlet.http.HttpServletRequest; 11 import javax.servlet.http.HttpServletResponse; 12 13 /** 14 * Servlet implementation class TestCookie 15 */ 16 @WebServlet("/TestCookie") 17 public class TestCookie extends HttpServlet { 18 private static final long serialVersionUID = 1L; 19 20 /** 21 * @see HttpServlet#HttpServlet() 22 */ 23 public TestCookie() { 24 super(); 25 // TODO Auto-generated constructor stub 26 } 27 28 /** 29 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) 30 */ 31 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 32 Cookie[] cs = request.getCookies(); // 拿到Cookie数组 33 34 response.setContentType("text/html"); 35 PrintWriter out = response.getWriter(); 36 out.print("<!DOCTYPE html>"); 37 out.print("<html>"); 38 out.print("<head>"); 39 out.print("<title>A Servlet</title>"); 40 out.print("</head>"); 41 out.print("<body>"); 42 43 if(cs != null && cs.length > 0){ 44 for(int i = 0; i < cs.length; i++){ 45 Cookie c = cs[i]; // 拿到Cookie 46 out.print(c.getName() + ":" + c.getValue()); // 输出cookie的名字和值 47 48 } 49 } 50 51 out.print("</body>"); 52 out.print("</html>"); 53 } 54 55 /** 56 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) 57 */ 58 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 59 // TODO Auto-generated method stub 60 doGet(request, response); 61 } 62 63 }
运行结果：
