引入后，保持jetty默认参数，但在项目中form提交数据的时候，运行到如下代码：

public void extractFormParameters(MultiMap<String> params) {
        try {
            int maxFormContentSize = 200000;
            int maxFormKeys = 1000;
            int maxFormKeys;
            if (this._context != null) {
                ContextHandler contextHandler = this._context.getContextHandler();
                maxFormContentSize = contextHandler.getMaxFormContentSize();
                maxFormKeys = contextHandler.getMaxFormKeys();
            } else {
                maxFormContentSize = this.lookupServerAttribute("org.eclipse.jetty.server.Request.maxFormContentSize", maxFormContentSize);
                maxFormKeys = this.lookupServerAttribute("org.eclipse.jetty.server.Request.maxFormKeys", maxFormKeys);
            }

            int contentLength = this.getContentLength();
            if (maxFormContentSize >= 0 && contentLength > maxFormContentSize) {
                throw new IllegalStateException("Form is larger than max length " + maxFormContentSize);
            } else {
                InputStream in = this.getInputStream();
                if (this._input.isAsync()) {
                    throw new IllegalStateException("Cannot extract parameters with async IO");
                } else {
                    UrlEncoded.decodeTo(in, params, this.getCharacterEncoding(), maxFormContentSize, maxFormKeys);
                }
            }
        } catch (IOException var6) {
            LOG.debug(var6);
            throw new RuntimeIOException(var6);
        }
    }

执行这里：

 if (this._context != null) {
                ContextHandler contextHandler = this._context.getContextHandler();
                maxFormContentSize = contextHandler.getMaxFormContentSize();
                maxFormKeys = contextHandler.getMaxFormKeys();
            } 

获取的参数还是系统默认的200000，jetty-starter中设置的在这里没有加载到，这里的this._context是不等于null的。