java Base64

s

Base64Test.java

https://www.cnblogs.com/mr-wuxiansheng/p/6931034.html

package com.iteye.lindows.base64;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class Base64Test {
	// 图片转化成base64字符串
	public static String GetImageStr() {// 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
		String imgFile = "C:\\Users\\Lindows\\Desktop\\png.png";// 待处理的图片
		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
	}

	// base64字符串转化成图片
	public static boolean GenerateImage(String imgStr) { // 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;
		BASE64Decoder decoder = new BASE64Decoder();
		try {
			// Base64解码
			byte[] b = decoder.decodeBuffer(imgStr);
			for (int i = 0; i < b.length; ++i) {
				if (b[i] < 0) {// 调整异常数据
					b[i] += 256;
				}
			}
			// 生成jpeg图片
			String imgFilePath = "C:\\Users\\Lindows\\Desktop\\png2.jpg";// 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;
		}
	}
		
	public static void main(String[] args) {
		String strImg = Base64Test.GetImageStr();
		System.out.println(strImg);
		Base64Test.GenerateImage(strImg);
	}
}

  

end

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转载自www.cnblogs.com/lindows/p/9580744.html