Cookie

public class Cookies {
	public int maxAge; // 设置该COOKIE的有效期,单位为秒
    public String path; // cookie路径
    Cookie[] cookie_get = {};

    public Cookies() {
//        maxAge = -1;
          maxAge = 60*60*24*14;//两周
//    	 maxAge = 180;//两周
//        path = "/";
    }

    /**
    * Put cookie to the client
    * 
    * @param response
    * @param name
    * @param value
    */
    public void putCookie(HttpServletResponse response, String name,
            String value) {
        try {
            Cookie cookie = new Cookie(name, encode(value));
            cookie.setMaxAge(maxAge);
            cookie.setPath("/");
	        if(Common.isLinux()){
	        	cookie.setDomain(".online.com");
	        }
            response.addCookie(cookie);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
    * get cookie from client
    * 
    * @param request
    * @param name
    * @return
    */
    public String getCookie(HttpServletRequest request, String name) {
        if (cookie_get == null || cookie_get.length == 0) {
            cookie_get = request.getCookies();
        }
        String returnStr;
        returnStr = null;
        try {
            for (int i = 0; cookie_get != null && i < cookie_get.length; i++) {
                cookie_get[i].setPath(path);
                if (cookie_get[i].getName().equals(name)) {
                    //cookie_get[i].setMaxAge(-1);
                    returnStr = cookie_get[i].getValue().toString();
                    break;
                }
            }
            return decode(returnStr);
        } catch (Exception e) {
            return decode(returnStr);
        }
    }

    /**
    * 清除Cookie
    * 
    * @param response
    *            HttpServletResponse
    * @param name
    *            String
    */
    public void removeCookie(HttpServletResponse response, String name) {
        putCookie(response, name, null);
    }

    /**
    * 对给定字符进行 URL 解码
    * 
    * @param value
    *            String
    * @return String
    */
    private static String decode(String value) {
        String result = "";
        if (!isEmpty(value)) {
            try {
                result = java.net.URLDecoder.decode(value, "UTF-8");                
                result = java.net.URLDecoder.decode(value, "UTF-8");                
            } catch (UnsupportedEncodingException ex) {

            }
        }
        return result;
    }

    /**
    * 对给定字符进行 URL 编码
    * 
    * @param value
    *            String
    * @return String
    */
    private static String encode(String value) {
        String result = "";
        if (!isEmpty(value)) {
            try {
                result = java.net.URLEncoder.encode(value, "UTF-8");
                result = java.net.URLEncoder.encode(value, "UTF-8");
            } catch (UnsupportedEncodingException ex) {

            }
        }
        return result;
    }

    /**
    * 判断是否为空，为空返回true
    * 
    * @param value
    *            String
    * @return boolean
    */
    private static boolean isEmpty(String value) {
        if (value == null || value.trim().equals(""))
            return true;
        else
            return false;
    }

    /**
    * 查检二个数据是否为空，如果为空返回true
    * 
    * @param value1
    * @param value2
    * @return
    */
    public boolean isEmpty(String value1, String value2) {
        if (null == value1 || null == value2 || "".equals(value1)
                || "".equals(value2))
            return true;
        else
            return false;
    }
  }


LoginAction:

登录成功：
Cookies cookies = new Cookies();
					cookies.putCookie(response, "name", user.getName().toLowerCase().trim());
					cookies.putCookie(response, "password",user.getPassWord());



js：
如果Cookie 从在自动登录
<script type="text/javascript">
	var cook = document.cookie;
	var coo =cook.split(";");
	var userId = "";
	var password = "";
	for(var i = 0; i < coo.length; i++) {
		var content = coo[i];
		if(content.indexOf("userId")!=-1){
			userId = content.split("=")[1];
			if(userId=="\"\""){
				userId="";
			}
		}
		if(content.indexOf("password")!=-1){
			password = content.split("=")[1];
			if(password=="\"\""){
				password="";
			}
		}
	}

	function login(){
		if(userId != "" && password != ""){
			window.location = "/login.do";
		}else{
			window.location = "/web/page/login/login_name.jsp";
		}
	}


</script>