JSP获取客户端IP的方法

request.getRemoteAddr();



获得客户端真实IP地址的方法一：
　

　public String getRemortIP(HttpServletRequest request) {
　　if (request.getHeader("x-forwarded-for") == null) {
　　return request.getRemoteAddr();
　　}
　　return request.getHeader("x-forwarded-for");
　　}

获得客户端真实IP地址的方法二：
　

　public String getIpAddr(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 ip;
　　}