/**
 * 上傳其他永久素材(圖片素材的上限為5000，其他類型為1000)
 *
 * @return
 * @throws Exception
 */
public static JSONObject addMaterialEver(String fileurl, String type, String token) {
    try {
        File file = new File(fileurl);
        //上傳素材
        String path = "https://api.weixin.qq.com/cgi-bin/material/add_material?access_token=
 
" + token + "&type=" + type;
        String result = connectHttpsByPost(path, null, file);
        result = result.replaceAll("[\\\\]", "");
        System.out.println("result:" + result);
        JSONObject resultJSON = JSONObject.fromObject(result);
        if (resultJSON != null) {
            
 
if (resultJSON.get("media_id") != null) {
                System.out.println("上傳" + type + "永久素材成功");
                return resultJSON;
            } else {
                System.out.println("上傳" + type + "永久素材失敗");
            }
        }
        return null;
    } catch (IOException e) {
        e.printStackTrace();
    } 
 
catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (NoSuchProviderException e) {
        e.printStackTrace();
    } catch (KeyManagementException e) {
        e.printStackTrace();
    }
    return null;
}

public static  String connectHttpsByPost(String path, String KK, File file) throws IOException, NoSuchAlgorithmException, NoSuchProviderException, KeyManagementException {
    URL urlObj = new URL(path);
    //連接
    HttpURLConnection con = (HttpURLConnection) urlObj.openConnection();
    String result = null;
    con.setDoInput(true);

    con.setDoOutput(true);

    con.setUseCaches(false); // post方式不能使用緩存

    // 設置請求頭信息
    con.setRequestProperty("Connection", "Keep-Alive");
    con.setRequestProperty("Charset", "UTF-8");
    // 設置邊界
    String BOUNDARY = "----------" + System.currentTimeMillis();
    con.setRequestProperty("Content-Type",
            "multipart/form-data; boundary="
                    + BOUNDARY);

    // 請求正文信息
    // 第一部分：
    StringBuilder sb = new StringBuilder();
    sb.append("--"); // 必須多兩道線
    sb.append(BOUNDARY);
    sb.append("\r\n");
    sb.append("Content-Disposition: form-data;name=\"media\";filelength=\"" + file.length() + "\";filename=\""

            + file.getName() + "\"\r\n");
    sb.append("Content-Type:application/octet-stream\r\n\r\n");
    byte[] head = sb.toString().getBytes("utf-8");
    // 獲得輸出流
    OutputStream out = new DataOutputStream(con.getOutputStream());
    // 輸出表頭
    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();
    // 結尾部分
    byte[] foot = ("\r\n--" + BOUNDARY + "--\r\n").getBytes("utf-8");// 定義最後數據分隔線
    out.write(foot);
    out.flush();
    out.close();
    StringBuffer buffer = new StringBuffer();
    BufferedReader reader = null;
    try {
        // 定義BufferedReader輸入流來讀取URL的響應
        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) {
        System.out.println("發送POST請求出現異常！" + e);
        e.printStackTrace();
    } finally {
        if (reader != null) {
            reader.close();
        }
    }
    return result;
}
public static void main(String[] args) {
    try {
        String AppID = "wxd3b299b48dcc33a3e";
        String AppSecret = "5acd4fa33c981041ec367ecf0c634ec38";
        AccessToken token = getAccessToken(AppID, AppSecret);
        String path = "D:/yongda.jpg";
        JSONObject object = addMaterialEver(path,"image",token.getToken());
        System.out.println(object.toString());
    } catch (Exception e) {
        System.out.println("---");
    }
}

微信上傳圖片