常用cookie處理方法工具類

知識 07-08

複製代碼

1 import java.io.UnsupportedEncodingException;

2 import java.net.URLDecoder;

4 import javax.servlet.http.Cookie;

5 import javax.servlet.http.HttpServletRequest;

6 import javax.servlet.http.HttpServletResponse;

8 /**

9 * 常用cookie處理方法工具類

10 */

11 public class CookieUtil {

13 /**

14 * 添加cookie

15 * @param response

16 * @param key cookie主鍵

17 * @param value cookie值

18 */

19 public static void addCookie(HttpServletResponse response, String key, String value){

20 Cookie cookie = new Cookie(key, value);

21 cookie.setPath("/");// 這個要設置

22 cookie.setMaxAge(60*60*24*30);//保留一個月以秒為單位

23 response.addCookie(cookie);

24 }

26 /**

27 * 刪除cookie

28 * @param request

29 * @param response

30 * @param key cookie主鍵

31 */

32 public static void deleteCookie(HttpServletRequest request, HttpServletResponse response, String key){

33 Cookie cookies[] = request.getCookies();

34 if (cookies != null) {

35 for (int i = 0; i < cookies.length; i++) {

36 if (cookies[i].getName().equals(key)) {

37 Cookie cookie = new Cookie(key,null);

38 cookie.setPath("/");//設置成跟寫入cookies一樣的

39 cookie.setMaxAge(0);

40 response.addCookie(cookie);

41 }

42 }

43 }

44 }

46 /**

47 * 取得cookie的值

48 * @param request

49 * @param key cookie主鍵

50 */

51 public static String getCookieValue(HttpServletRequest request, String key) throws UnsupportedEncodingException{

52 for(Cookie cookie : request.getCookies()){

53 if (cookie.getName().equals(key)) {

54 return URLDecoder.decode(cookie.getValue(), "UTF-8");

55 }

56 }

57 return null;

58 }

59 }

功能：cookie的添加、刪除、獲取值