package com.doumee.core.utils;
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import org.apache.commons.codec.binary.Base64;
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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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import java.net.HttpURLConnection;
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import java.net.URL;
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public class ImageBase64Util {
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/**
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* 将图片转换成Base64编码
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* @param imgFile 待处理图片
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* @return
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*/
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public static String getImgStr(String imgFile) {
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// 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
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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(imgFile);
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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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}
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return Base64.encodeBase64String(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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* @param imgStr 图片数据
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* @param imgFilePath 保存图片全路径地址
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* @return
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*/
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public static boolean generateImage(String imgStr, String imgFilePath) {
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//
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if (imgStr == null) // 图像数据为空
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return false;
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BASE64Decoder decoder = new BASE64Decoder();
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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) {// 调整异常数据
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b[i] += 256;
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}
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}
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// 生成jpg图片
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OutputStream out = new FileOutputStream(imgFilePath);
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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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}
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}
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/**
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* 远程读取image转换为Base64字符串
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* @param imgUrl
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* @return
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*/
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public static String Image2Base64(String imgUrl) {
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URL url = null;
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InputStream is = null;
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ByteArrayOutputStream outStream = null;
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HttpURLConnection httpUrl = null;
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try{
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url = new URL(imgUrl);
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httpUrl = (HttpURLConnection) url.openConnection();
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httpUrl.connect();
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httpUrl.getInputStream();
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is = httpUrl.getInputStream();
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outStream = new ByteArrayOutputStream();
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//创建一个Buffer字符串
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byte[] buffer = new byte[1024];
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//每次读取的字符串长度，如果为-1，代表全部读取完毕
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int len = 0;
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//使用一个输入流从buffer里把数据读取出来
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while( (len=is.read(buffer)) != -1 ){
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//用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度
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outStream.write(buffer, 0, len);
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}
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// 对字节数组Base64编码
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return new BASE64Encoder().encode(outStream.toByteArray());
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}catch (Exception e) {
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e.printStackTrace();
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}
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finally{
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if(is != null)
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{
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try {
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is.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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if(outStream != null)
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{
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try {
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outStream.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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if(httpUrl != null)
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{
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httpUrl.disconnect();
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}
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}
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return null;
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}
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public static void main(String[] args) {
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String url= "http://doumeetest.oss-cn-beijing.aliyuncs.com/member/20210515/de923f81-b417-47fc-a702-472d60d7870a.png";// 待处理的图片
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String imgbese = Image2Base64(url);
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System.out.println(imgbese);
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// String url= "D:\\1.jpg";// 新生成的图片
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// generateImage(imgbese, url);
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}
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}
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