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
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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");
}
}
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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服务器之家。
原文链接：https://blog.csdn.net/rentian1/article/details/81104190