java实现上传网络图片到微信临时素材

本文实例为大家分享了java实现上传网络图片到微信临时素材的具体代码，供大家参考，具体内容如下

package org.afuos.playcontrol.service;
 
import com.alibaba.fastjson.json;
import com.alibaba.fastjson.jsonobject;
 
import java.io.*;
import java.net.httpurlconnection;
import java.net.url;
 
/**
 * created by mohon on 2017/8/10.
 */
public class uploadpictowx {
 
 /**
 * 网络图片上传到微信服务器
 *
 * @param urlpath 图片路径
 * @return jsonobject
 * @throws exception
 */
 public string getmediaidfromurl(string urlpath, string filetype) throws exception {
 string result = null;
 string url = "http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token= access_token &type=" + filetype + "";
 string filename = urlpath.substring(urlpath.lastindexof("/") + 1);
 // 获取网络图片
 url mediaurl = new url(urlpath);
 httpurlconnection meidaconn = (httpurlconnection) mediaurl.openconnection();
 meidaconn.setdooutput(true);
 meidaconn.setrequestmethod("get");
 
 /**
  * 第一部分
  */
 url urlobj = new url(url);
 httpurlconnection con = (httpurlconnection) urlobj.openconnection();
 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=\"media\";filename=\"" + filename + "\"\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(meidaconn.getinputstream());
 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();
 meidaconn.disconnect();
 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) {
  buffer.append(line);
  }
  if (result == null) {
  result = buffer.tostring();
  }
 } catch (ioexception e) {
  log.info("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();
  }
 }
 jsonobject jsonobj = json.parseobject(result);
 log.info("getmediaid jsonobj: {}", jsonobj);
 return jsonobj.getstring("media_id");
 }
}

来源：uploadpictowx.java

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。