ThreadLocal的应用

古城微笑少年丶 2023-02-10 01:18 2阅读 0赞

### 文章目录 ###

*   *  摘要
     *  一、实现

## 摘要 ##

ThreadLocal的应用，登陆后保存登陆的用户信息。

## 一、实现 ##

package com.mtons.mblog.util;
    
    import java.util.Date;
    
    /** * dotnet写入登录session的ticket User: bjzhyb Date: 2010-6-14 Time: 21:16:58 * * port from com.jd.common.struts.interceptor.dotnet.FormsAuthenticationTicket. * remove dependency with struts. * * 如果是任务触发执行，ThreadLocal是没有值的 * 这里重写了hashcode方法 */
    public class DotnetAuthenticationTicket { 
        private final static ThreadLocal<DotnetAuthenticationTicket> holder = new ThreadLocal<DotnetAuthenticationTicket>();
    
        /** * 指定的版本号 */
        private int _version = 0;
        /** * 登录用户名 */
        private String _userName;
        /** * 用户data */
        private String _userData;
        /** * 登录写入的路径 */
        private String _appPath;
        /** * 过期日期 */
        private Date _expires;
        /** * 发布日期 */
        private Date _issueDate;
    
        private boolean _isPersistent = false;
    
        public int getVersion() { 
            return _version;
        }
    
        public String getUsername() { 
            return _userName;
        }
    
        public String getUserData() { 
            return _userData;
        }
    
        public String getAppPath() { 
            return _appPath;
        }
    
        public Date getExpires() { 
            return _expires;
        }
    
        public Date getIssueDate() { 
            return _issueDate;
        }
    
        public boolean isPersistent() { 
            return _isPersistent;
        }
    
        /** * 判断cookie是不是过期 * * @return true 过期。false 未过期 */
        public boolean isExpired() { 
            return (new Date()).after(_expires);
        }
    
        public DotnetAuthenticationTicket(String username, String userdata,
                String appPath,
                                         Date issued, Date expires, int version,
                boolean isPersistent) throws Exception { 
            if (username == null || username == null)
                throw new Exception("username");
            else
                _userName = username;
            if (userdata == null)
                _userData = "";
            else
                _userData = userdata;
            if (appPath == null)
                _appPath = "/";
            else if (!appPath.startsWith("/"))
                _appPath = "/" + appPath;
            else
                _appPath = appPath;
            if (issued == null)
                _issueDate = new Date();
            else
                _issueDate = issued;
            if (expires == null)
                _expires = new Date(System.currentTimeMillis() + 30 * 1000 * 60); // 30
                                                                                  // mins
            else
                _expires = expires;
            if (version > 0)
                _version = version;
            else
                _version = 1;
    
        }
    
        public String toString() { 
            return "version=" + _version + "," +
                    "userName=" + _userName + "," +
                    "userData=" + _userData + "," +
                    "appPath=" + _appPath + "," +
                    "isPersistent=" + _isPersistent + "," +
                    "issueDate=" + _issueDate + "," +
                    "expires=" + _expires;
        }
    
        @Override
        public boolean equals(Object o) { 
            if (this == o)
                return true;
            if (o == null || getClass() != o.getClass())
                return false;
    
            DotnetAuthenticationTicket ticket = (DotnetAuthenticationTicket) o;
    
            if (_isPersistent != ticket._isPersistent)
                return false;
            if (_version != ticket._version)
                return false;
            if (_appPath != null ? !_appPath.equals(ticket._appPath)
                    : ticket._appPath != null)
                return false;
            if (_expires != null ? !_expires.equals(ticket._expires)
                    : ticket._expires != null)
                return false;
            if (_issueDate != null ? !_issueDate.equals(ticket._issueDate)
                    : ticket._issueDate != null)
                return false;
            if (_userData != null ? !_userData.equals(ticket._userData)
                    : ticket._userData != null)
                return false;
            if (_userName != null ? !_userName.equals(ticket._userName)
                    : ticket._userName != null)
                return false;
    
            return true;
        }
    
        @Override
        public int hashCode() { 
            int result = _version;
            result = 31 * result + (_userName != null ? _userName.hashCode() : 0);
            result = 31 * result + (_userData != null ? _userData.hashCode() : 0);
            result = 31 * result + (_appPath != null ? _appPath.hashCode() : 0);
            result = 31 * result + (_expires != null ? _expires.hashCode() : 0);
            result = 31 * result + (_issueDate != null ? _issueDate.hashCode() : 0);
            result = 31 * result + (_isPersistent ? 1 : 0);
            return result;
        }
    
        /** * 实际上是将FormsAuthenticationTicket放到了actionContext中 * * @param ticket * 对象 */
        public static void setTicket(DotnetAuthenticationTicket ticket) { 
            holder.set(ticket);
        }
    
        /** * 取出ticket的上下文 * * @return null 如果没有的话 */
        public static DotnetAuthenticationTicket getTicket() { 
            return holder.get();
        }
    
        /** * 删除上下文、其实一般不用删除 */
        public static void remove() { 
            holder.remove();
        }
    
    }