生成、解析base64编码的图片
//图片转化成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>
{//将图片文件转化为字节数组字符串，并对其进行Base64编码处理
InputStream in = null;
byte[] data = null;
//读取图片字节数组
try
{
in = new FileInputStream(imgFile);
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();
return encoder.encode(data);//返回Base64编码过的字节数组字符串
}
<span style="white-space:pre"> </span>//base64字符串转化成图片
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>
{ //对字节数组字符串进行Base64解码并生成图片
if (imgStr == null) //图像数据为空
return false;
BASE64Encoder decoder = new BASE64Encoder();
try
{
//Base64解码
byte[] b = decoder.decode(imgStr);
for(int i=0;i<b.length;++i)
{
if(b[i]<0)
{//调整异常数据
b[i]+=256;
}
}
//新生成的图片
OutputStream out = new FileOutputStream(imgFilePath);
out.write(b);
out.flush();
out.close();
return true;
}
catch (Exception e)
{
return false;
}
}
网页上显示
<!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=‘data:image/gif;base64,字符串‘/>
</body>
</html>
原文地址：http://blog.csdn.net/yixian918/article/details/42124297
