ThreadLocal取代每次都从session中获取登录用户信息

ThreadLocal取代每次都从session中获取登录用户信息

2017年06月12日 10:28:37

• 2048

方式一：直接使用JDK中ThreadLocal方式

1.先定义一个存放登录用户信息的实体类，并在这里面操纵用户信息

"font-size:12px;">public class UserContext implements Serializable{
}

2.在过滤其中进行存放用户登录信息

public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException,
            ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        HttpSession session = request.getSession();

        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");

        response.addHeader("Access-Control-Allow-Origin","*");
        response.addHeader("Access-Control-Allow-Credentials", "true");
        response.addHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept,X-Pagination");
        response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
        response.addHeader("Access-Control-Expose-Headers", "X-Pagination");

        //System.out.println(session.getId());
        if (isInclude(request.getServletPath())) {
            LoginEntity loginEntity = (LoginEntity) session.getAttribute(Const.LOGINED_KEY);
            if (loginEntity != null) {
                UserContext.setUserSession(loginEntity);
                chain.doFilter(request, response);
            } else {
                unLogin(response);
            }
        } else {
            chain.doFilter(request, response);
        }
    }

方式二：RequestContextHolder是Spring中对ThreadLocal进行了封装

1.先定义一个存放登录用户信息的实体类，并在这里面操纵用户信息

"font-size:12px;">public class UserContext implements Serializable{
}

2.在过滤其中进行存放用户登录信息

public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException,
            ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        HttpSession session = request.getSession();

        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");

        response.addHeader("Access-Control-Allow-Origin","*");
        response.addHeader("Access-Control-Allow-Credentials", "true");
        response.addHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept,X-Pagination");
        response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
        response.addHeader("Access-Control-Expose-Headers", "X-Pagination");

        //System.out.println(session.getId());
        if (isInclude(request.getServletPath())) {
            LoginEntity loginEntity = (LoginEntity) session.getAttribute(Const.LOGINED_KEY);
            if (loginEntity != null) {
                UserContext.setUserSession(loginEntity);
                chain.doFilter(request, response);
            } else {
                unLogin(response);
            }
        } else {
            chain.doFilter(request, response);
        }
    }

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