server
{
    listen 80;
    server_name ***.***.com;
    
    location / {
    	proxy_pass http://127.0.0.1:8686;
  	}
    
    #一鍵申請SSL證書驗證目錄相關設置
    location ~ \.well-known{
        allow all;
    }
    
    access_log  /www/wwwlogs/***.***.com.log;
    error_log  /www/wwwlogs/***.***.com.error.log;
}

<dependency>
    <groupId>org.mitre.dsmiley.httpproxy</groupId>
    <artifactId>smiley-http-proxy-servlet</artifactId>
    <version>1.12.1</version>
</dependency>

proxy:
    solr:
        servlet_url: /proxy/*
        target_url: http://solrserver:8983/proxy

@Configuration
public class SolrProxyServletConfiguration implements EnvironmentAware {

    @Bean
    public ServletRegistrationBean servletRegistrationBean() {
        Properties properties= (Properties) bindResult.get();
        // 設置代理前綴
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new ProxyServlet(), properties.getProperty("servlet_url"));
        // 設置代理目標地址
        servletRegistrationBean.addInitParameter(ProxyServlet.P_TARGET_URI, properties.getProperty("target_url"));
        // 設置是否打印日志
        servletRegistrationBean.addInitParameter(ProxyServlet.P_LOG, properties.getProperty("logging_enabled", "false"));
        return servletRegistrationBean;
    }

    private BindResult bindResult;

    @Override
    public void setEnvironment(Environment environment) {
        Iterable sources = ConfigurationPropertySources.get(environment);
        Binder binder = new Binder(sources);
        BindResult bindResult = binder.bind("proxy.solr", Properties.class);
        this.bindResult = bindResult;
    }
}

  protected HttpRequest newProxyRequestWithEntity(
      String method, String proxyRequestUri, HttpServletRequest servletRequest) throws IOException {
    HttpEntityEnclosingRequest eProxyRequest =
        new BasicHttpEntityEnclosingRequest(method, proxyRequestUri);

    String contentType = servletRequest.getContentType();

    boolean isFormPost =
        (contentType != null
            && contentType.contains("application/x-www-form-urlencoded")
            && "POST".equalsIgnoreCase(servletRequest.getMethod()));

    if (isFormPost) {
      List<NameValuePair> queryParams = Collections.emptyList();
      String queryString = servletRequest.getQueryString();
      if (queryString != null) {
        queryParams = URLEncodedUtils.parse(queryString, Consts.UTF_8);
      }

      Map<String, String[]> form = servletRequest.getParameterMap();
      List<NameValuePair> params = new ArrayList<>();

      OUTER_LOOP:
      for (Iterator<String> nameIterator = form.keySet().iterator(); nameIterator.hasNext(); ) {
        String name = nameIterator.next();

        // skip parameters from query string
        for (NameValuePair queryParam : queryParams) {
          if (name.equals(queryParam.getName())) {
            continue OUTER_LOOP;
          }
        }

        String[] value = form.get(name);
        if (value.length != 1) {
          throw new RuntimeException("expecting one value in post form");
        }
        params.add(new BasicNameValuePair(name, value[0]));
      }
      eProxyRequest.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

    } else {
      eProxyRequest.setEntity(
          new InputStreamEntity(servletRequest.getInputStream(), getContentLength(servletRequest)));
    }
    return eProxyRequest;
  }

ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new MyProxyServlet(), properties.getProperty("servlet_url"));