SpringSafeSessionFilter.java 文件源码

@Override
protected void doFilterInternal(
        HttpServletRequest req, HttpServletResponse res, FilterChain chain)
        throws ServletException, IOException {

    ServletRequestAttributes attributes = new ServletRequestAttributes(req, res);

    try {

        if(1 + 1 == 2) {

            SecurityContext oldCtx = SecurityContextHolder.getContext();
            SecurityContextHolder.setContext(null); //
            try {
                super.doFilter(req, res, chain);
            } finally {
                SecurityContextHolder.setContext(oldCtx);
            }
        }
        else {
            super.doFilter(req, res, chain);
        }
    }
    finally {
        attributes.requestCompleted();
    }
}