Question

在base64中显示图像非常简单：

<img src="data:image/png;base64,hexadecimal-code-for-image-here">

但是，我要做的是转换接收到的十六进制值并将其保存在png文件中，以便从代码中获取所需的图片。

例如：假设我有以下代码：
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有什么方法可以将这段代码转换为图像，然后存储在JAVA中的png文件中？

Answer 1

将base64转换为字节数组，然后将其写入png文件。

byte[] img = Base64.getDecoder().decode(imgBase64);
Files.write(Paths.get("my.png"), img); //As suggested by Joop Eggen

Answer 2

将base64图像解码为byte []，然后使用ImageIO写入文件

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Custom select box Jquery Plugin by VJ</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css">

<!--| Flag Icons
This stylesheet provides the flag icons. 
For details, go to: 
https://afeld.github.io/emoji-css/
-->

  <link href="https://afeld.github.io/emoji-css/emoji.css" rel="stylesheet" />
</head>

<body>
 <form id="container">
  <fieldset>
    <legend>Country</legend>

<!--| Pseudo-<select> 
<details> provides the dropdown behavior and
<summary> contains the pseudo-<option>
-->
    <details>
     <summary>

<!--| 4 Pseudo-<option> 
Each <label> and <input type='radio'> pair are
synced to each other by matching the values of
<label for="ID"> and <input id="ID">. 
-->

<!--| Trigger and State
When <label> is clicked ... <input type='radio'>
is checked. This simple "cause and effect" can
be leveraged into a system of states (ie off/on). 
For details, review the CSS. 
-->

  <input id='X' type='radio' class='rad' name='rad' value="" checked>
  <label class='opt' for='X'>
    &nbsp;&nbsp;╍╍╍╍╍╍╍╍╍
  </label>

  <input id='US' type='radio' class='rad' name='rad' value="United States">
  <label class='opt' for='US'>
    &nbsp;&nbsp;
    <i class='em em-us'></i> 
    United States
  </label>

  <input id='GB' type='radio' class='rad' name='rad' value="Great Britain">
  <label class='opt' for='GB'>
    &nbsp;&nbsp;
    <i class='em em-gb'></i> 
    Great Britain
  </label>

  <input id='IN' type='radio' class='rad' name='rad' value="India">
  <label class='opt' for='IN'>
    &nbsp;&nbsp;
    <i class='em em-flag-in'></i>
    India
  </label>

  <input id='NP' type='radio' class='rad' name='rad' value="Nepal">
  <label class='opt' for='NP'>
    &nbsp;&nbsp;
    <i class='em em-flag-np'></i>
    Nepal
  </label>

  </summary>
</details>
</fieldset>
</form>

</body>
</html>

用Java将图像数据保存到“ PNG”文件中

2 个答案: