服務器IP：

String addr = InetAddress.getLocalHost().getHostAddress();

說明：很明顯上面是沒考慮到服務器有多個iP的情況。

客戶頓啊IP：

　　/**
     * 獲取IP
     *
     * @param request HttpServletRequest
     * @return IP字符串
     */
    public static String getRemoteHost(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        
 
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null
 
 || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : ip;
    }

Java獲取服務器IP和客戶端IP