java获取请求接口的ip

要获取请求接口的IP，可以使用Java的Servlet API中的HttpServletRequest对象的getRemoteAddr()方法。这个方法返回客户端的IP地址，也就是请求接口的IP地址。

下面是一个示例代码：

import javax.servlet.http.HttpServletRequest;

public class RequestUtils {
    public static String getClientIp(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;
    }
}

在Servlet或者Controller层，通过HttpServletRequest对象调用getClientIp方法即可获取请求接口的IP。

@RequestMapping("/test")
public String test(HttpServletRequest request) {
    String ip = RequestUtils.getClientIp(request);
    // ...
}