springboot获取访问者ip

在Spring Boot中获取访问者的IP地址可以通过HttpServletRequest对象来实现。以下是一个示例代码：

import javax.servlet.http.HttpServletRequest;

@RestController
public class MyController {

    @GetMapping("/getIp")
    public String getIp(HttpServletRequest request) {
        String ipAddress = request.getHeader("X-Forwarded-For");
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getRemoteAddr();
        }
        return ipAddress;
    }
}

上述代码中，我们通过HttpServletRequest对象的getHeader方法来获取请求头中的X-Forwarded-For字段，该字段通常包含了客户端的真实IP地址。如果X-Forwarded-For字段为空或者为unknown，则尝试获取其他可能包含IP地址的请求头字段。如果所有的请求头字段都没有获取到IP地址，则使用request.getRemoteAddr()方法获取客户端的IP地址。