Tomcat中连接的唯一标识符

一种选择是使用ServletFilter：

public class UniqueRequestFilter implements Filter {    public void doFilter(ServletRequest req, ServletResponse res,   FilterChain chain) throws IOException, ServletException {        String requestID = UUID.randomUUID().toString()        //save to ThreadLocal...        try { chain.doFilter(req, res);        }        finally { //remove from ThreadLocal        }    }    public void init(FilterConfig config) throws ServletException {    }    public void destroy() {    }}

您可以随时在应用程序中从ThreadLocal获取请求值。