在 Spring Boot JAVA 中将自定义标头注入 ServletRequest

我需要将自定义标头注入 Spring Boot 应用程序收到的每个请求中，为此，我编写了一些代码，但似乎没有完成它的工作。简而言之，我已经实现了 Filter 接口并定义了 doFilter 方法，扩展了 HttpServletRequestWrapper 类，并覆盖了 getHeader() 和 getHeaderNames() 方法以考虑我从属性文件中读取的自定义标头。

但是，当我进入控制器并检查请求时，我没有获得通过 MyReqWrapper 设置的自定义标头。下面是代码，我也试过在 Stackoverflow 中搜索它，但找不到关于什么是/可能是错的解决方案。有人可以指出我正确的方向吗？

另外，请指点我如何测试是否实际设置了自定义标题。

这是过滤器实现

@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
public class ReqFilter implements Filter {
    private static final String CUSTOMHEADERENABLED = "customheadersenabled";
    private static final String CUSTOMHEADERCOUNT = "customheaderscount";
    
    @Autowired
    private Environment env;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        //
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        try {
            boolean customHeadersEnabled = Boolean.parseBoolean(env.getProperty(CUSTOMHEADERENABLED, "false"));
            int count = Integer.parseInt(env.getProperty(CUSTOMHEADERCOUNT, "0"));

            if (customHeadersEnabled && count > 0) {
                MyReqWrapper myReq = new MyReqWrapper((HttpServletRequest) servletRequest);
                myReq.processMyHeaders(count, env);
                filterChain.doFilter(customRequest, servletResponse);
            } else {
                filterChain.doFilter(servletRequest, servletResponse);
            }
        }
        catch(ServletException ex){
            throw ex;
        }
    }

    @Override
    public void destroy() {
        //
    }
}

这是扩展 HttpServletRequestWrapper 的自定义请求包装器

final class MyReqWrapper extends HttpServletRequestWrapper {
    private static final String CUSTOMHEADERPREFIX = "header1";
    private final Map<String, String> myHeaders;

    public MyReqWrapper(HttpServletRequest request) {
        super(request);
        myHeaders = new HashMap<>();
    }

    @Override
    public String getHeader(String name) {
        String headerValue = myHeaders.get(name);

        if (headerValue != null){
            return headerValue;
        }
        return ((HttpServletRequest) getRequest()).getHeader(name);
    }

    @Override
    public Enumeration<String> getHeaderNames() {
        Set<String> set = new HashSet<>(myHeaders.keySet());

        Enumeration<String> headerNames = ((HttpServletRequest) getRequest()).getHeaderNames();
        while (headerNames.hasMoreElements()) {
            String n = headerNames.nextElement();
            set.add(n);
        }
        return Collections.enumeration(set);
    }

    public void processMyHeaders(int headerCount, Environment env) {
        while(headerCount > 0){
            String [] headerKeyValue = Objects.requireNonNull(env.getProperty(String.format("%1$s%2$s", CUSTOMHEADERPREFIX, headerCount--)))
                    .split(":");
            this.myHeaders.put(headerKeyValue[0], headerKeyValue[1]);
        }
    }
}