nginx代理tomcat时，tomcat获取的客户端不是客户端传过来的ip。
原因分析：
nginx作为代理服务器先拦截客户端发来的请求，它再以localhost的身份转发给tomcat去处理。
解决办法：
在nginx配置中的location节点中添加：
复制代码 代码示例:
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header REMOTE-HOST $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
java中这样获取远程IP地址：
复制代码 代码示例:
public static 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;
}
