java 通过 url 获取网络图片 并转换为 base64 字符串

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import org.jsoup.Jsoup; import org.jsoup.nodes.Element; import org.springframework.stereotype.Service;   import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.util.ArrayList; import java.util.Base64; import java.util.List; import java.util.Map;   public String imageChangeBase64(String imagePath){         ByteArrayOutputStream outPut = new ByteArrayOutputStream();         byte[] data = new byte[1024];         try {             // 创建URL             URL url = new URL(imagePath);             // 创建链接             HttpURLConnection conn = (HttpURLConnection) url.openConnection();             conn.setRequestMethod("GET");             conn.setConnectTimeout(10 * 1000);               if(conn.getResponseCode() != 200) {                 return "fail";//连接失败/链接失效/图片不存在             }             InputStream inStream = conn.getInputStream();             int len = -1;             while ((len = inStream.read(data)) != -1) {                 outPut.write(data, 0, len);             }             inStream.close();         } catch (IOException e) {             e.printStackTrace();         }         // 对字节数组Base64编码         byte[] encode = Base64.getEncoder().encode(outPut.toByteArray());         String res = new String(encode);         return res;

　　

 

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