JAVA 图片地址路径转换 Base64 工具类

￡神魔★判官ぃ 2021-11-23 01:16 376阅读 0赞

工具类代码：

import sun.misc.BASE64Encoder;
    import java.io.ByteArrayOutputStream;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.util.Objects;
    
    public class ImageToBase64Utils {
    
        private static String strNetImageToBase64;
        private static String strLocalImageToBase64;
        public static void main(String[] args) {
            //第一个:把网络图片装换成Base64
           String netImagePath = "http://fc-feed.cdn.bcebos.com/0/pic/8015cec4ee757a20f0b1f28b6b6daf9a.jpg";
            //下面是网络图片转换Base64的方法
            String imageToBase64 =NetImageToBase64(netImagePath);
    
            //下面是本地图片转换Base64的方法
            // String imagePath = "C:\\Users\\Administrator\\IdeaProjects\\testdemo\\src\\main\\resources\\static\\testPictrue.jpg";
    
    
           // String imageToBase64 = LocalImageToBase64(imagePath);
            System.out.println(imageToBase64);
        }
    
        /**
         * 网络图片转换Base64的方法
         *
         * @param netImagePath     
         */
        public static String NetImageToBase64(String netImagePath) {
            final ByteArrayOutputStream data = new ByteArrayOutputStream();
            try {
                // 创建URL
                URL url = new URL(netImagePath);
                final byte[] by = new byte[1024];
                // 创建链接
                final HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setRequestMethod("GET");
                conn.setConnectTimeout(5000);
    
    
                InputStream is = conn.getInputStream();
                // 将内容读取内存中
                int len = -1;
                while ((len = is.read(by)) != -1) {
                    data.write(by, 0, len);
                }
                // 对字节数组Base64编码
                BASE64Encoder encoder = new BASE64Encoder();
                strNetImageToBase64 = encoder.encode(data.toByteArray());
                System.out.println("网络图片转换Base64:" + strNetImageToBase64);
                // 关闭流
                is.close();
    
    
            } catch (IOException e) {
                e.printStackTrace();
            }
    
            return strNetImageToBase64;
        }
    
    
        /**
         * 本地图片转换Base64的方法
         *
         * @param imgPath     
         * @return
         */
    
        public static String LocalImageToBase64(String imgPath) {
            byte[] data = null;
            // 读取图片字节数组
            try {
                InputStream in = new FileInputStream(imgPath);
                data = new byte[in.available()];
                in.read(data);
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            // 对字节数组Base64编码
            BASE64Encoder encoder = new BASE64Encoder();
            // 返回Base64编码过的字节数组字符串
            System.out.println("本地图片转换Base64:" + encoder.encode(Objects.requireNonNull(data)));
            strLocalImageToBase64=encoder.encode(Objects.requireNonNull(data));
            return strLocalImageToBase64;
        }
    }