fuint-application/application-service/src/main/java/com/fuint/application/util/HttpPostUploadUtil.java

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package com.fuint.application.util;

import com.fuint.exception.BusinessCheckException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;
import java.io.BufferedReader;
import java.io.Closeable;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import java.util.Iterator;
import java.util.Map;

/**
 * Http协议上传图片工具类
 * Created by FSQ
 * Contact wx fsq_better
 * Site https://www.fuint.cn
 */
public class HttpPostUploadUtil {

    private static final Logger logger = LoggerFactory.getLogger(HttpPostUploadUtil.class);

    /**
     * 上传图片 到图片服务器
     *
     * @param urlStr         图片服务器URL
     * @param connectTimeout 上传图片连接超时时间（单位：毫秒）
     * @param readTimeout    上传图片读取超时时间（单位：毫秒）
     * @param textMap        图片服务器要求的图片输入框参数
     * @param fileMap        图片参数
     * @return
     * @throws BusinessCheckException
     */
    public static String formUpload(String urlStr, int connectTimeout, int readTimeout, Map<String, String> textMap, Map<String, MultipartFile> fileMap) throws BusinessCheckException {
        String res = "";
        HttpURLConnection conn = null;
        OutputStream out = null;
        BufferedReader reader = null;
        String BOUNDARY = "---------------------------123821742118716"; //boundary就是request头和上传文件内容的分隔符
        try {
            URL url = new URL(urlStr);
            conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(connectTimeout);
            conn.setReadTimeout(readTimeout);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");
            conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);