java怎么获取HTTP请求头信息 获取与解析HTTP请求头参数的方法

import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;

public void readHeaders(HttpServletRequest request) {
    // 获取指定头信息
    String userAgent = request.getHeader("User-Agent");
    String contentType = request.getHeader("Content-Type");

    System.out.println("User-Agent: " + userAgent);
    System.out.println("Content-Type: " + contentType);

    // 遍历所有请求头
    Enumeration headerNames = request.getHeaderNames();
    while (headerNames.hasMoreElements()) {
        String headerName = headerNames.nextElement();
        Enumeration headers = request.getHeaders(headerName);
        while (headers.hasMoreElements()) {
            String headerValue = headers.nextElement();
            System.out.println(headerName + ": " + headerValue);
        }
    }
}

String authHeader = request.getHeader("Authorization");
if (authHeader != null && authHeader.startsWith("Bearer ")) {
    String token = authHeader.substring(7); // 去掉 "Bearer " 前缀
    System.out.println("Token: " + token);
}

import org.springframework.web.bind.annotation.*;

@RestController
public class HeaderController {

    @GetMapping("/info")
    public String getInfo(@RequestHeader("User-Agent") String userAgent,
                          @RequestHeader(value = "Authorization", required = false) String auth) {
        return "User-Agent: " + userAgent + ", Auth: " + auth;
    }
}

public String getAllHeaders(@RequestHeader Map headers) {
    headers.forEach((key, value) -> System.out.println(key + ": " + value));
    return "Headers processed";
}