SpringMVC中几种获取访客IP的方法

核心在获取HttpServletRequest

第一种方法：在方法上面的参数列表里打上HttpServletRequest@RequestMapping(value="/index.html",method=RequestMethod.GET)
public String index(HttpServletRequest req) {
String remoteAddr = req.getRemoteAddr();
System.out.println(remoteAddr);
return "index";
}第二种方法：
使用@autowire自动注入HttpServletRequest对象，在controller页面@Autowired
HttpServletRequest req;
第三种方法：
使用springMVC封装的方法得到request@RequestMapping(value="/index.html",method=RequestMethod.GET)
public String index() {
HttpServletRequest req = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
String remoteAddr = req.getRemoteAddr();
System.out.println(remoteAddr);
return "index";
}

注意点：

如果在本机上开发，使用http://localhost:8080/之类去访问，会得到一串都是0的IP，把localhost改成127.0.0.1即可看到效果
如果采用nginx反向代理，需要改写一下才能获取到访客的真实ip：可以写一个如下的工具类package com.utils;

import javax.servlet.http.HttpServletRequest;

public class GetIP {
public String getIP(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.getHeader("X-Real-IP");
}
if(ip==null || ip.length()==0 || "unknown".equalsIgnoreCase(ip)){
ip=request.getRemoteAddr();
}
return ip;
}

}