微信小程序直播插件--获取临时文件（后台集成小程序直播）

package com.ruoyi.web.controller.api.liveimg_wx;

import com.fasterxml.jackson.core.JsonParser;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HttpContext;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

public class utils {

    static String token="58_AzlN4Kc7ZcvNb6628Hwe7a8HeQD6xI2rW4xB16x4eTNfV8CTBop0_oGuWTHCH3m95voDRkhVTbfy5QTizijiZicKVI4X8nzMUFHicbYsT-_oQrLG-Jc3rRa8Ia2jPhCsWhJ9ooO4sqY0hcu-YBYhABALOL";
    public static void main(String[] args) throws IOException {
        String filePath = "D:\\Pictures\\logo.jpg";
        String sendUrl = "https://api.weixin.qq.com/cgi-bin/media/upload?access_token="+token+"&type=image";
        String result = null;
        utils fileUpload = new utils();
        result = fileUpload.send(sendUrl, filePath);
        System.out.println(result);
    }




    /**
     * 模拟form表单的形式 ，上传文件 以输出流的形式把文件写入到url中，然后用输入流来获取url的响应
     *
     * @param url      请求地址 form表单url地址
     * @param filePath 文件在服务器保存路径
     * @return String url的响应信息返回值
     */
    public String send(String url, String filePath) throws IOException {
        String result = null;
        File file = new File(filePath);
        if (!file.exists() || !file.isFile()) {
            throw new IOException("文件不存在");
        }


/**
 * 第一部分
 */
        URL urlObj = new URL(url);
// 连接
        HttpURLConnection con = (HttpURLConnection) urlObj.openConnection();


/**
 * 设置关键值
 */
        con.setRequestMethod("POST"); // 以Post方式提交表单，默认get方式
        con.setDoInput(true);
        con.setDoOutput(true);
        con.setUseCaches(false); // post方式不能使用缓存


// 设置请求头信息
        con.setRequestProperty("Connection", "Keep-Alive");
        con.setRequestProperty("Charset", "UTF-8");


// 设置边界
        String BOUNDARY = "----------" + System.currentTimeMillis();
        con.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);


// 请求正文信息


// 第一部分：
        StringBuilder sb = new StringBuilder();
        sb.append("--"); // 必须多两道线
        sb.append(BOUNDARY);
        sb.append("\r\n");
        sb.append("Content-Disposition: form-data;name=\"file\";filename=\""
                + file.getName() + "\"\r\n");
        sb.append("Content-Type:application/octet-stream\r\n\r\n");


        byte[] head = sb.toString().getBytes("utf-8");


// 获得输出流
        OutputStream out = new DataOutputStream(con.getOutputStream());
// 输出表头
        out.write(head);


// 文件正文部分
// 把文件已流文件的方式 推入到url中
        DataInputStream in = new DataInputStream(new FileInputStream(file));
        int bytes = 0;
        byte[] bufferOut = new byte[1024];
        while ((bytes = in.read(bufferOut)) != -1) {
            out.write(bufferOut, 0, bytes);
        }
        in.close();


// 结尾部分
        byte[] foot = ("\r\n--" + BOUNDARY + "--\r\n").getBytes("utf-8");// 定义最后数据分隔线


        out.write(foot);


        out.flush();
        out.close();


        StringBuffer buffer = new StringBuffer();
        BufferedReader reader = null;
        try {
// 定义BufferedReader输入流来读取URL的响应
            reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String line = null;
            while ((line = reader.readLine()) != null) {
//System.out.println(line);
                buffer.append(line);
            }
            if (result == null) {
                result = buffer.toString();
            }
        } catch (IOException e) {
            System.out.println("发送POST请求出现异常！" + e);
            e.printStackTrace();
            throw new IOException("数据读取异常");
        } finally {
            if (reader != null) {
                reader.close();
            }

        }
        return result;
    }
}