Http 解析url 各种参数类型工具类（文件，json,xml）

本文链接：https://blog.youkuaiyun.com/weixin_44043580/article/details/108442052

本文介绍了如何在HTTP POST请求中传递不同类型的参数，包括文件、JSON格式数据和XML格式数据。详细讲解了如何进行HTTP post请求携带文件，以及解析WebService中的XML格式数据。

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1.http post请求传参数+文件

import java.nio.charset.Charset;
import java.util.*;


import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.*;


/**
 * 
 * @Description:
 * @Author：ay
 * @Date：2020/8/26
 */
public class HttpFileUtils {
    private static final Logger log = LoggerFactory.getLogger(HttpUtil.class);
    private static final CloseableHttpClient httpclient = HttpClients.createDefault();
    private static final String userAgent = "Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.87 Safari/537.36";
    /** * 发送HttpPost请求，参数为文件，适用于微信上传素材 * * @param url * 请求地址 * @param file * 上传的文件 * @return 返回字符串 * @throws IOException * @throws ClientProtocolException */
    public static String sendPost(String url, String method,Map<String, Object> paramMap, List<File> files) throws IOException {
        // 20190519 wangwei 修改参数逻辑： 参数级别url，paramMap，attributes，前面已经出现的，后面设置的无效
        // 定义包含的参数
        // 提出原本url里面的参数
        List<String> existParamList = getUrlParam(url);
        StringBuffer params = new StringBuffer();
        // url参数处理
        if (paramMap != null && paramMap.size() > 0) {
            Iterator<Map.Entry<String, Object>> iter = paramMap.entrySet().iterator();
            while (iter.hasNext()) {
                Map.Entry<String, Object> entry = iter.next();
                if (!existParamList.contains(entry.getKey())) {
                    params.append(entry.getKey() + "=" + entry.getValue() + "&");
                    existParamList.add(entry.getKey());
                }
            }
        }
        // 获取request自带参数
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if (attributes != null) {
            HttpServletRequest request = attributes.getRequest();
            Enumeration<String> enuer = request.getParameterNames();
            while (enuer.hasMoreElements()) {
                String paraName = (String) enuer.nextElement();
                // 参数（如果需要得统一编码处理࿰