java head参数 java设置header

public class HeaderMapRequestWrapper extends HttpServletRequestWrapper {
    /**
     * construct a wrapper for this request
     *
     * @param request
     */
    public HeaderMapRequestWrapper(HttpServletRequest request) {
        super(request);
    }

    private Map<String, String> headerMap = new HashMap<String, String>();

    /**
     * add a header with given name and value
     *
     * @param name
     * @param value
     */
    public void addHeader(String name, String value) {
        headerMap.put(name, value);
    }

    public void updateHeader(String name, String value) {
        headerMap.put(name, value);
    }

    @Override
    public String getHeader(String name) {
        String headerValue = super.getHeader(name);
        if (headerMap.containsKey(name)) {
            headerValue = headerMap.get(name);
        }
        return headerValue;
    }

    /**
     * get the Header names
     */
    @Override
    public Enumeration<String> getHeaderNames() {
        List<String> names = Collections.list(super.getHeaderNames());
        for (String name : headerMap.keySet()) {
            names.add(name);
        }
        return Collections.enumeration(names);
    }

    @Override
    public Enumeration<String> getHeaders(String name) {
        List<String> values = Collections.list(super.getHeaders(name));
        if (headerMap.containsKey(name)) {
            values.add(headerMap.get(name));
        }
        return Collections.enumeration(values);
    }

}

@Component
public class LoginFilter extends OncePerRequestFilter {

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {

        HeaderMapRequestWrapper requestWrapper = new HeaderMapRequestWrapper(request);

        // 过滤掉 请求时携带的jwt
        String requestURI = requestWrapper.getRequestURI()+"niutrans";
        if (requestURI.startsWith("/login")) {
            System.out.println("header："+requestWrapper.getHeader("jwt"));
            requestWrapper.updateHeader("jwt","hahaha");
            System.out.println("header："+requestWrapper.getHeader("jwt"));
        }

        filterChain.doFilter(requestWrapper, response);
    }


}