ActionMessages的使用&cookies操作验证码

ActionMessages errors = new ActionMessages();
AuthCodeCookie authCodeCookie = new AuthCodeCookie(request,response);
if (!authCodeCookie.getAuthCode().equals(form.getAuthCode())) {//验证码不正确
errors.add("error.login.authcode", new ActionMessage("error.login.authcode"));//ApplicationResources.properties
this.saveErrors(request, errors);
         return mapping.getInputForward();//不跳转，必须在action中指定input属性
}

html中必须有：<html:errors/>接收

登录的时候保存验证码到cookies，详见：验证码的生成，并且“看不清，换一张”
AuthCodeCookie authCodeCookie = new AuthCodeCookie(request, response);
authCodeCookie.addAuthCode(authCode);//保存验证码到cookies

cookies类
public class AuthCodeCookie {
private HttpServletRequest request;
private HttpServletResponse response;
public AuthCodeCookie(HttpServletRequest request,
HttpServletResponse response) {
this.request = request;
this.response = response;
}

public void addAuthCode(String authCode) {
addCookie("AUTHCODE", authCode);
}

public void addCookie(String name, String value) {
Cookie cookies = new Cookie(name, value);
cookies.setPath("/");
cookies.setMaxAge(-1);//设置cookie经过多长秒后被删除。如果0，就说明立即删除。如果是负数就表明当浏览器关闭时自动删除。
response.addCookie(cookies);
}

public String getAuthCode(){
return getCookies("AUTHCODE");
}

public String getCookies(String cookieName) {
Cookie[] cookies = request.getCookies();
Cookie cookie = null;
try {
if (cookies != null && cookies.length > 0) {
for (int i = 0; i < cookies.length; i++) {
cookie = cookies[i];
if (cookie.getName().equals(cookieName)) {
return cookie.getValue();
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
}