Cookie Helper

對處理 Cookie 很煩嗎? 試試這個 Cookie Helper.
原作者: Vasil Lukach, 2014/01/05
Source: http://stackoverflow.com/questions/20934016/how-to-add-cookie-in-jsf

1:  public class CookieHelper {  
2:   public void setCookie(String name, String value, int expiry) {  
3:    FacesContext facesContext = FacesContext.getCurrentInstance();  
4:    HttpServletRequest request = (HttpServletRequest) facesContext.getExternalContext().getRequest();  
5:    Cookie cookie = null;  
6:    Cookie[] userCookies = request.getCookies();  
7:    if (userCookies != null && userCookies.length > 0 ) {  
8:      for (int i = 0; i < userCookies.length; i++) {  
9:        if (userCookies[i].getName().equals(name)) {  
10:          cookie = userCookies[i];  
11:          break;  
12:        }  
13:      }  
14:    }  
15:    if (cookie != null) {  
16:      cookie.setValue(value);  
17:    } else {  
18:      cookie = new Cookie(name, value);  
19:      cookie.setPath(request.getContextPath());  
20:    }  
21:    cookie.setMaxAge(expiry);  
22:    HttpServletResponse response = (HttpServletResponse) facesContext.getExternalContext().getResponse();  
23:    response.addCookie(cookie);  
24:   }  
25:   public Cookie getCookie(String name) {  
26:    FacesContext facesContext = FacesContext.getCurrentInstance();  
27:    HttpServletRequest request = (HttpServletRequest) facesContext.getExternalContext().getRequest();  
28:    Cookie cookie = null;  
29:    Cookie[] userCookies = request.getCookies();  
30:    if (userCookies != null && userCookies.length > 0 ) {  
31:      for (int i = 0; i < userCookies.length; i++) {  
32:        if (userCookies[i].getName().equals(name)) {  
33:          cookie = userCookies[i];  
34:          return cookie;  
35:        }  
36:      }  
37:    }  
38:    return null;  
39:   }  
40:  }