RequestHolder

1. ThreadLocal 相當於map，map中的key是當前的程序

public class RequestHolder {

    private static final ThreadLocal<SysUser> userHolder = new ThreadLocal<SysUser>();

    private static final ThreadLocal<HttpServletRequest> requestHolder = new ThreadLocal<HttpServletRequest>();

    public
 
 static void add(SysUser sysUser) {
        userHolder.set(sysUser);
    }

    public static void add(HttpServletRequest request) {
        requestHolder.set(request);
    }

    public static SysUser getCurrentUser() {
        return userHolder.get();
    }

    public static HttpServletRequest getCurrentRequest
 
() {
        return requestHolder.get();
    }

    public static void remove() {
        userHolder.remove();
        requestHolder.remove();
    }
}

使用

Interceptor

    @Override
    public void afterCompletion {
        removeThreadLocalInfo();
    }

    public void removeThreadLocalInfo() {
        RequestHolder.remove();;
    }
 

LoginFilter

@Slf4j
public class LoginFilter implements Filter {

    public void init(FilterConfig filterConfig) throws ServletException {

    }

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) servletRequest;
        HttpServletResponse resp = (HttpServletResponse) servletResponse;

        SysUser sysUser = (SysUser)req.getSession().getAttribute("user");
        if (sysUser == null) {
            String path = "/signin.jsp";
            resp.sendRedirect(path);
            return;
        }
        RequestHolder.add(sysUser);
        RequestHolder.add(req);
        filterChain.doFilter(servletRequest, servletResponse);
        return;
    }

    public void destroy() {

    }
}

web.xml

  <filter>
    <filter-name>loginFilter</filter-name>
    <filter-class>com.mmall.filter.LoginFilter</filter-class>
  </filter>

  <filter-mapping>
    <filter-name>loginFilter</filter-name>
    <url-pattern>/sys/*</url-pattern>
    <url-pattern>/admin/*</url-pattern>
  </filter-mapping>