package com.ld.igds.util;
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import sun.misc.BASE64Decoder;
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import sun.misc.BASE64Encoder;
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import java.io.*;
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/**
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*
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*/
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@SuppressWarnings("restriction")
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public class Base64Util {
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public static String UTF_8 = "UTF-8";
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public static String BASE_IMG_START = "data:image/jpg;base64,";
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/**
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* 根据地址，把图片转换为Base64字符串
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* <p>
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* data:image/jpg;base64,
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*
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* @param diskFile
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* @return
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*/
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public static String getImageStr(String diskFile) {
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InputStream in = null;
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byte[] data = null;
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// 读取图片字节数组
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try {
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in = new FileInputStream(diskFile);
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data = new byte[in.available()];
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in.read(data);
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// in.close();
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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try {
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if (null != in)
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in.close();
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} catch (Exception e) {
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}
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}
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BASE64Encoder encoder = new BASE64Encoder();
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return BASE_IMG_START + encoder.encode(data);
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}
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/**
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* 对字节数组字符串进行Base64解码并生成图片
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*
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* @param imgStr
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* @return
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*/
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public static boolean generateImage(String imgStr, String diskFile) {
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if (imgStr == null)
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return false;
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if (imgStr.startsWith("data:")) {
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imgStr = imgStr.substring(BASE_IMG_START.length());
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}
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BASE64Decoder decoder = new BASE64Decoder();
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OutputStream out = null;
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try {
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// Base64解码
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byte[] b = decoder.decodeBuffer(imgStr);
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for (int i = 0; i < b.length; ++i) {
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if (b[i] < 0) {
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b[i] += 256;
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}
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}
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// 生成jpeg图片
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out = new FileOutputStream(diskFile);
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out.write(b);
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out.flush();
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// out.close();
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return true;
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} catch (Exception e) {
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return false;
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} finally {
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try {
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if (null != out)
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out.close();
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} catch (Exception e) {
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}
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}
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}
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public static String encode2String(byte[] data) {
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BASE64Encoder encoder = new BASE64Encoder();
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return BASE_IMG_START + encoder.encode(data);
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}
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// public static void main(String[] args) {
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// String disFile =
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// "D:\\IGDS\\INOUT\\202108\\intou_in_202108241321178261.jpg";
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//
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//
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// String strImg = getImageStr(disFile);
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//
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// System.out.println(strImg);
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//
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// String disFile2 = "D:\\IGDS\\INOUT\\202108\\" +
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// System.currentTimeMillis() + "_new.jpg";
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//
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// generateImage(strImg, disFile2);
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// }
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}
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