获取用户真实IP地址

水深无声 2022-06-06 10:06 349阅读 0赞

/\*\*   
     \* 获取用户真实IP地址，不使用request.getRemoteAddr()的原因是有可能用户使用了代理软件方式避免真实IP地址,   
     \* 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值   
     \*    
     \* @return ip  
     \*/  
    private String getIpAddr(HttpServletRequest request) \{  
        String ip = request.getHeader("x-forwarded-for");   
        System.out.println("x-forwarded-for ip: " + ip);  
        if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) \{    
            // 多次反向代理后会有多个ip值，第一个ip才是真实ip  
            if( ip.indexOf(",")!=-1 )\{  
                ip = ip.split(",")\[0\];  
            \}  
        \}    
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) \{    
            ip = request.getHeader("Proxy-Client-IP");    
            System.out.println("Proxy-Client-IP ip: " + ip);  
        \}    
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) \{    
            ip = request.getHeader("WL-Proxy-Client-IP");    
            System.out.println("WL-Proxy-Client-IP ip: " + ip);  
        \}    
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) \{    
            ip = request.getHeader("HTTP\_CLIENT\_IP");    
            System.out.println("HTTP\_CLIENT\_IP ip: " + ip);  
        \}    
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) \{    
            ip = request.getHeader("HTTP\_X\_FORWARDED\_FOR");    
            System.out.println("HTTP\_X\_FORWARDED\_FOR ip: " + ip);  
        \}    
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) \{    
            ip = request.getHeader("X-Real-IP");    
            System.out.println("X-Real-IP ip: " + ip);  
        \}    
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) \{    
            ip = request.getRemoteAddr();    
            System.out.println("getRemoteAddr ip: " + ip);  
        \}   
        System.out.println("获取客户端ip: " + ip);  
          
        return ip;    
    \}