springboot中put请求（content-type为application/x-www-form-urlencoded）中url有占位符参数并且请求体中有参数，请求体中参数获取不到

springboot中自带HttpPutFormContentFilter用于处理put请求，如果获取不到参数，可以将该过滤器优先级提高，如下：

package com.mycompany.myapp.config;

import javax.servlet.annotation.WebFilter;

import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.HttpPutFormContentFilter;

/**
* @author xuzhipeng
* @date 2018-11-20 15:47:39
* @since 1.0
*/
@Component
@WebFilter(urlPatterns = "/*", filterName = "putFilter")
@Order(Integer.MIN_VALUE)
public class PutFilter extends HttpPutFormContentFilter {

}

/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.web.filter;

import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Enumeration;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;

import org.springframework.http.HttpInputMessage;
import org.springframework.http.MediaType;
import org.springframework.http.converter.FormHttpMessageConverter;
import org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter;
import org.springframework.http.server.ServletServerHttpRequest;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.MultiValueMap;
import org.springframework.util.StringUtils;

/**
 * {@link javax.servlet.Filter} that makes form encoded data available through
 * the {@code ServletRequest.getParameter*()} family of methods during HTTP PUT
 * or PATCH requests.
 *
 * 
The Servlet spec requires form data to be available for HTTP POST but
 * not for HTTP PUT or PATCH requests. This filter intercepts HTTP PUT and PATCH
 * requests where content type is {@code 'application/x-www-form-urlencoded'},
 * reads form encoded content from the body of the request, and wraps the ServletRequest
 * in order to make the form data available as request parameters just like
 * it is for HTTP POST requests.
 *
 * @author Rossen Stoyanchev
 * @since 3.1
 */
public class HttpPutFormContentFilter extends OncePerRequestFilter {

    private FormHttpMessageConverter formConverter = new AllEncompassingFormHttpMessageConverter();


    /**
     * Set the converter to use for parsing form content.
     * 
By default this is an instnace of {@link AllEncompassingFormHttpMessageConverter}.
     */
    public void setFormConverter(FormHttpMessageConverter converter) {
        Assert.notNull(converter, "FormHttpMessageConverter is required.");
        this.formConverter = converter;
    }

    public FormHttpMessageConverter getFormConverter() {
        return this.formConverter;
    }

    /**
     * The default character set to use for reading form data.
     * This is a shortcut for:

     * {@code getFormConverter.setCharset(charset)}.
     */
    public void setCharset(Charset charset) {
        this.formConverter.setCharset(charset);
    }


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

        if (("PUT".equals(request.getMethod()) || "PATCH".equals(request.getMethod())) && isFormContentType(request)) {
            HttpInputMessage inputMessage = new ServletServerHttpRequest(request) {
                @Override
                public InputStream getBody() throws IOException {
                    return request.getInputStream();
                }
            };
            MultiValueMap formParameters = this.formConverter.read(null, inputMessage);
            if (!formParameters.isEmpty()) {
                HttpServletRequest wrapper = new HttpPutFormContentRequestWrapper(request, formParameters);
                filterChain.doFilter(wrapper, response);
                return;
            }
        }

        filterChain.doFilter(request, response);
    }

    private boolean isFormContentType(HttpServletRequest request) {
        String contentType = request.getContentType();
        if (contentType != null) {
            try {
                MediaType mediaType = MediaType.parseMediaType(contentType);
                return (MediaType.APPLICATION_FORM_URLENCODED.includes(mediaType));
            }
            catch (IllegalArgumentException ex) {
                return false;
            }
        }
        else {
            return false;
        }
    }


    private static class HttpPutFormContentRequestWrapper extends HttpServletRequestWrapper {

        private MultiValueMap formParameters;

        public HttpPutFormContentRequestWrapper(HttpServletRequest request, MultiValueMap parameters) {
            super(request);
            this.formParameters = parameters;
        }

        @Override
        @Nullable
        public String getParameter(String name) {
            String queryStringValue = super.getParameter(name);
            String formValue = this.formParameters.getFirst(name);
            return (queryStringValue != null ? queryStringValue : formValue);
        }

        @Override
        public Map getParameterMap() {
            Map result = new LinkedHashMap<>();
            Enumeration names = getParameterNames();
            while (names.hasMoreElements()) {
                String name = names.nextElement();
                result.put(name, getParameterValues(name));
            }
            return result;
        }

        @Override
        public Enumeration getParameterNames() {
            Set names = new LinkedHashSet<>();
            names.addAll(Collections.list(super.getParameterNames()));
            names.addAll(this.formParameters.keySet());
            return Collections.enumeration(names);
        }

        @Override
        @Nullable
        public String[] getParameterValues(String name) {
            String[] parameterValues = super.getParameterValues(name);
            List formParam = this.formParameters.get(name);
            if (formParam == null) {
                return parameterValues;
            }
            if (parameterValues == null || getQueryString() == null) {
                return StringUtils.toStringArray(formParam);
            }
            else {
                List result = new ArrayList<>(parameterValues.length + formParam.size());
                result.addAll(Arrays.asList(parameterValues));
                result.addAll(formParam);
                return StringUtils.toStringArray(result);
            }
        }
    }

}