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  • 图片url转base64

    /**
         * 通过图片的url获取图片的base64字符串
         * @param imgUrl    图片url
         * @return    返回图片base64的字符串
         */
        public static String image2Base64(String imgUrl) {
            URL url = null;
            InputStream is = null;
            ByteArrayOutputStream outStream = null;
            HttpURLConnection httpUrl = null;
            try {
                url = new URL(imgUrl);
                httpUrl = (HttpURLConnection) url.openConnection();
                httpUrl.connect();
                httpUrl.getInputStream();
                is = httpUrl.getInputStream();
                outStream = new ByteArrayOutputStream();
                //创建一个Buffer字符串
                byte[] buffer = new byte[1024];
                //每次读取的字符串长度,如果为-1,代表全部读取完毕
                int len = 0;
                //使用一个输入流从buffer里把数据读取出来
                while ((len = is.read(buffer)) != -1) {
                    //用输出流往buffer里写入数据,中间参数代表从哪个位置开始读,len代表读取的长度
                    outStream.write(buffer, 0, len);
                }
                // 对字节数组Base64编码
                BASE64Encoder base64Encoder = new BASE64Encoder();
                return base64Encoder.encode(outStream.toByteArray());
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if (is != null) {
                    try {
                        is.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (outStream != null) {
                    try {
                        outStream.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (httpUrl != null) {
                    httpUrl.disconnect();
                }
            }
            return imgUrl;
        }

    图片url转base64

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  • 原文地址:https://www.cnblogs.com/mikemhm/p/12012291.html
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