生成、解析base64編碼的圖片//圖片轉化成base64字符串 public static String GetImageStr(<span style="font-family: Arial, Helvetica, sans-serif;">String imgFile</span><span style="font-family: Arial, Helvetica, sans-serif;">) </span>
{//將圖片文件轉化為字節數組字符串，并對其進行Base64編碼處理 InputStream in = null; byte[] data = null; //讀取圖片字節數組 try { in = new FileInputStream(imgFile); data = new byte[in.available()]; in.read(data); in.close(); } catch (IOException e) { e.printStackTrace(); } //對字節數組Base64編碼 BASE64Encoder encoder = new BASE64Encoder(); return encoder.encode(data);//返回Base64編碼過的字節數組字符串 } <span style="white-space:pre"> </span>//base64字符串轉化成圖片 public static boolean GenerateImage(String imgStr,<span style="font-family: Arial, Helvetica, sans-serif;">String imgFilePath</span><span style="font-family: Arial, Helvetica, sans-serif;">) </span>
{ //對字節數組字符串進行Base64解碼并生成圖片 if (imgStr == null) //圖像數據為空 return false; BASE64Encoder decoder = new BASE64Encoder(); try { //Base64解碼 byte[] b = decoder.decode(imgStr); for(int i=0;i<b.length;++i) { if(b[i]<0) {//調整異常數據 b[i]+=256; } } //新生成的圖片 OutputStream out = new FileOutputStream(imgFilePath); out.write(b); out.flush(); out.close(); return true; } catch (Exception e) { return false; } }網頁上顯示
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>img</title>
<link rel="stylesheet" type="text/css" href="">
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</head>
<body>
<img src='https://img-blog.csdnimg.cn/2022011707150925853.gif'/>
</body>
</html>
...)
 初讀筆記)
