java获取来源系统ip

原创

mob64ca12e6f33c 2024-02-29 05:19:06 ©著作权

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如何在Java中获取来源系统IP

流程图

flowchart TD
    A(开始) --> B(获取HttpServletRequest对象)
    B --> C(获取IP地址)
    C --> D(返回IP地址)
    D --> E(结束)

关系图

erDiagram
    GET请求 --> HttpServletRequest对象
    HttpServletRequest对象 --> IP地址
    IP地址 --> 结果

步骤

步骤	描述
1	获取HttpServletRequest对象
2	从HttpServletRequest对象中获取IP地址
3	返回IP地址

代码实现

// 步骤1: 获取HttpServletRequest对象
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();

上面的代码中，我们使用Spring框架的RequestContextHolder来获取HttpServletRequest对象。

// 步骤2: 从HttpServletRequest对象中获取IP地址
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("HTTP_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
    ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
    ip = request.getRemoteAddr();
}

上面的代码中，我们从HttpServletRequest对象中尝试获取IP地址，先从X-Forwarded-For、Proxy-Client-IP、WL-Proxy-Client-IP、HTTP_CLIENT_IP、HTTP_X_FORWARDED_FOR这些header中获取，如果获取不到则使用request.getRemoteAddr()方法获取。