通过指定的URL获取返回图片的BASE64编码

之前本来都是通过URL直接显示图片的,后来需求变更前端需要图片的base64,但是现在数据库只有URL,写了个方法通过URL获取图片的BASE64

方法:

/*** 通过图片的url获取图片的base64字符串* @param imgUrl    图片url* @return    返回图片base64的字符串*/public static String image2Base64(String imgUrl) {URL url = null;InputStream is = null;ByteArrayOutputStream outStream = null;HttpURLConnection httpUrl = null;try{url = new URL(imgUrl);httpUrl = (HttpURLConnection) url.openConnection();httpUrl.connect();httpUrl.getInputStream();is = httpUrl.getInputStream();outStream = new ByteArrayOutputStream();//创建一个Buffer字符串byte[] buffer = new byte[1024];//每次读取的字符串长度，如果为-1，代表全部读取完毕int len = 0;//使用一个输入流从buffer里把数据读取出来while( (len=is.read(buffer)) != -1 ){//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outStream.write(buffer, 0, len);}// 对字节数组Base64编码return Base64Util.encode(outStream.toByteArray());}catch (Exception e) {e.printStackTrace();}finally{if(is != null){try {is.close();} catch (IOException e) {e.printStackTrace();}}if(outStream != null){try {outStream.close();} catch (IOException e) {e.printStackTrace();}}if(httpUrl != null){httpUrl.disconnect();}}return imgUrl;}

工具类Base64

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;import javax.imageio.stream.FileImageInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;public class Base64Util {/*** 字符串转图片* @param base64Str* @return*/public static byte[] decode(String base64Str){byte[] b = null;BASE64Decoder decoder = new BASE64Decoder();try {b = decoder.decodeBuffer(replaceEnter(base64Str));} catch (IOException e) {e.printStackTrace();}return b;}/*** 图片转字符串* @param image* @return*/public static String encode(byte[] image){BASE64Encoder decoder = new BASE64Encoder();return replaceEnter(decoder.encode(image));}public static String encode(String uri){BASE64Encoder encoder = new BASE64Encoder();return replaceEnter(encoder.encode(uri.getBytes()));}/**** @path    图片路径* @return*/public static byte[] imageTobyte(String path){byte[] data = null;FileImageInputStream input = null;try {input = new FileImageInputStream(new File(path));ByteArrayOutputStream output = new ByteArrayOutputStream();byte[] buf = new byte[1024];int numBytesRead = 0;while((numBytesRead = input.read(buf)) != -1){output.write(buf, 0, numBytesRead);}data = output.toByteArray();output.close();input.close();} catch (Exception e) {e.printStackTrace();}return data;}public static String replaceEnter(String str){String reg ="[\n-\r]";Pattern p = Pattern.compile(reg);Matcher m = p.matcher(str);return m.replaceAll("");}}

测试

public static void main(String[] args) {String base64 = image2Base64("http://storage.360buyimg.com/**********************/b91f0de2-848f-4adc-9baf-2a8dfb6d9737.jpg");System.out.println(base64);}

输出结果

/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYnKSopGR8tMC0oMCUoKSj/2wBDAQcHBwoIChMKChMoGhYaKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCj/wAARCAH0AfQDASIAAhEBAxEB/8QAHQABAAEFAQEBAAAAAAAAAAAAAAQBAgMFBwYICf/EAEgQAAIBAwIDBQQGCAMGBQUAAAABAgMEEQUhBhIxBxNBUWEiMnGBFCNCUpGhCBUzYnKxwdFDgpJTorLC0vAXJGNz4SY0NbPi/8QAGgEBAAMBAQEAAAAAAAAAAAAAAAECAwQFBv/EACYRAQACAgICAgEFAQEAAAAAAAABAgMRBDESISJBMhMUQlFhMyP/2gAMAwEAAhEDEQA/APqkAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACjYFcgwV7mjQhzVqkIR85PCNRLivQ/pDofrO171dY85E2iO0xW0/TfA11trFhcT5KF5b1J+UaibJ8ZqXQiLRPRNZjtUAFkAAAAAAAAAAAAAAMGKtcUqEeatUhCPnJ4Rq58U6FCbjLVbNSXVd6iJmITqW6BFtb+1u1m1uKNX+CaZIU0+gNKgAlAAAAAAAAAAAAAAAAAAAAAAAAAAAKgAAAAAAAAAAAAAAAAAAAAAAAAAC2UsHg+PuPLTQaFW3t5xqXm8cZ2j8SZ2icR/qbTlStt7yvGSg/urbLPnLiG4qXN5OVWbnKTy2zkzZv41d/E4v6kedmw1fjTUtR7ypdXU5LwjnoeMutWrxvHXjNtvrlmp1rV1ju6Pueeep5utf1Zy95mFcd7du62SlJ1DoEeMLqnTS52n5HseAO1fU9ErpalXq3tk8c1Jyy4RXXk/scId/Uj1efmSKd05VY8mVnfOTSuO1J2zvamSNS/QrRdVtdY02hfWFWNW3rLmjKLyT08nyZ+jpx5W07iSPD15OdeyvXmM4R5o06vRN46JrZ59GfTlfXrChzKVeM2uqpvmaOquSJjcvMvhmJ1HttweTuOMbeMmqNvKb8HJpGsueMbtpxoUaMH4OWZYKznpH2mvHyT9Pfg5ZX4k1ipDH0uMf4YJGvq8QarHl/8/cZbx1j/Yr+5q0jhZJdjBxt8R61TXsahUf8UYv+hmpca61SjidWlU/jpp4/Afuap/ZZHXiqOX2vaFdQWLmzpVH505ODZu7DtA02vJRuYVrZ+c1lfkWjNSftnbi5K/T2cpYOY9oHaXaaNOpZac4VrqG1ST6Q9F6mm7bO02hw7o0LXSaynd6hFpV4bqlDo2n95+C8Op8uXWuVK9ablOT5nltvdlb5JmNVa8bBX8sjrGq8YXGp1JVbivWqVJb+1L2V8EalaxyTUupzX9dOm8QlJy8UkZHrVVe8/wAzmnHaXf5U+nUKGvVqFRVrWU6daPuyjLDT89jpHCHajdWlZU9fqfSrXZd9CGKkP3v3kfPVhrNOq8U/Zm/Bs29HUnHDb3JrNsamTHGSNPtvTr2hqFrC5tKtOrb1EpQnCWU0Sj5s7G+NqmnazHS7urnTruXs8z/ZVZdJLyT6YPpKLyjsx384eXkxzSdSqCuBg0ZKAAAAAAAAAAAAAAAAAAAAAAAAqAAAAAAAAAAAAAAAAAAAAAAAAAUk8ID517SdZnW1+7qSlmnRk6cF6Lb+hxHiPW+fmp0ptSaayjoHafczhq+pUpPEu+nn03OJanKoqrknnfc8+kRNpmXuWtNMURC24rSlFZkQ6cqlWqoUITqSyliCcm/gkew4L7Pdc4tjCvRoq00+TaV3X2jL0gvtP8vU7/wbwHo3ClGP0Sj395y8s7qqszb9Pur0RrbJWrkpiteXD+GeyjiDV406t/GGl0JLKdf2qjXmqa/rg6hoXZNw5p1GP0uNzqFZdJXMsU1/kW345OitLbBRo575rT07K4K1QrHT7awoqhY0KFtQ8YUaagn+BJqKK92KXwE5cpZz5M/KZaxWI6XZLGsblrqJFk7iOCs+1tK1JbYItZbQ/iLpVU3vsYK9eDUeR53WfxIWX1H6EephEWvfJVHFstV1FrqBlmssxSSXRFkriPmYnUUukiUF3CFxRlRuKdKtRksOFWEZJ/ieG4i7PNL1F99pi/V9XGFCEXKE36xfT5M9tJN9WWzlgtW816Z3pFu3z/rXDer6BmNzbudHO1aj7UX8fFfM0nePq9z6SuPrI4PC8VcC2F9GdxYpWd0+vIsQk/VHRTNE/k5MuCf4uV0q7hJSjs0ehs9T72lFNZl47nntV0680u4lRvKLjLwlH2oy+DK6ZUcamG+ptesMMeS0Tp7Wzu5RfNCUoyjumnhpn2v2d6s9c4L0fUptOpc2sKk2vvYxL80z4Uta2NvM+z+wqlKl2WcPqptLuJYXlHvJuP5NE4o1KvK/GHQMjJQHQ4VQAEqAAAAAAAAAAAAAAAAAAAAAKgAAAAAAAAAAAAAAAAAAAAAAAFGsoqUk8IiR8l/pG6dW0jiqdZRfc30FXjJrHpJfLGf8xruzDsznqNO31jiyhONo3z0LGfs94s5U6n2lDyXV/A+h+ObLStadtQvrOldTtayrwlUWVCov5/DpsaitM87JeKzqr2MFJtSJsxxjTo0qdOlGmowjypd3yqK8kl0XoY5TyJSTMUqiyc8zt1VrpXm8yjlnoYKlVeBgnWT6MlfS+tUam0zE60YrdkevWWepFqVU+m4NJs66fumCVxFe8QK1Zr3diJUruXvAmE26u8KTiaqtqCh5ow3FfmeEyPUUWsyCVzuoym2ssv8ApS8iG3Fe6WKW5aIGyhW5llZKwrSya51eXrIvhXX3ifFDZqqy7mz4mtVZP7RljPHVlNCXJpIizkntJbFJ18GCrVyskxCEHV9Nt9Qt3b3lONSnLzW6+Hkcr4m4dr6DVlOOZ2bfsTxvH4nV53DcssxXUI3FtNVYwcJrEotbNeTN62058uKs/L7cv4T0y71/WrPSrOPNc3lRUYeSz1fyWX8j9AtB0+lpWk2ljbRUaFrRhQpr0isHBv0a+DdH0/WNX1SnVnV1GGKNGnOP7ClLOWn4t4xnyXqfREVyxSOzF7jbys95n1KoK4GDVzgACVAAAAAAAAAAAAAAAAAAAAAFQAAAAAAAAAAAAAAAAAAAAAAMAaPiHVPolLuqTxWks5XVIn6ldRtbadWXgtvU57d3M6tSVSrJylLxZzZsuvUOvi4P1J3PS2vUby+rZArVC2rXk5vlZGqTOCZe1EMjqZMNSbMUquehFr12njJC2marNxWzIFSrzMpVqyl4kfISyTqNojVJvwMkiPU2AsqzZGqSwjJUeTBUeY4JQiVJYbZDqVZTe/gTKkcLc19SUV7qJhWWOcnHoy3mk1lPBbUeWYKtSSws+z5FhknJp+8XwqtepDlUTWEUVTC3YQ2kaywZo3C5MPc00auTJ3qUfHJA2vfp7FkpvHmauNfD8USqVVteYRtSpOWegjWnHrsi+bzuR6i5pMlFvbdcNa/dcP6rRvrF7wfLOm37NSHjF/38D6f4d1m313R7bULOWaVWO6zvGXjF+qPkF+wzp3YlxQtN1V6Vd1MW17L2G/sVf7PodOHJr4vN5ODfyq+hUyuSyJcdjzwAAAAAAAAAAAAAAAAAAAAAAAFQAAAAAAAAAAAAAAAAAAAAApJ4Ksh6ncK2tZ1H1isoi06jaax5Tp5jia+7yq6MX7EOvqzylaphuT6EvUKzlUnzPxNTUm5ybfRdDyr38p297DjilYrDG60csj1ayZZVnuyNKoUdEel1SphNp4Ik5Nybb6l1SoYZyyEjkvF4MVSrFPCZZUeWRqvUkZnWedmYpyb6swyfKWSqPAF85YMOcmOdZ/BFneZIRMrLmeYtLwNZJ+bJd3VTTSNPcVXz4TLIZp1kvAjVZKUnuY5Sz4mJyx4kjKlhJF3LkjRrLO7MsaiLKTKueWfL4F/MY6nmYskKzLIpZm4kq3nJRw3t5kD7SZLpz26BCapN9JJkW4covmi9myqq48DHUrZYFk6kvtF9vc1KFaFSlJxlHdNGKe+5jexMTpWz657PtfjxDwxaXfMpVku6rLynHZnp8HBf0e9cS1HUdKqSadaEa9NN7Nxypfk4/gd6PQxW3V4uWvjeYAAaMwAAAAAAAAAAAAAAAAAAAABUAAAAAAAAAAAAAAAAAAAAAfQ8zxXdYhGjB74zI9Mzw/FE83015JIyzzqkuji18skPLXdXmm8mvr1Hy7bGW/nyyl6Gsq18xaPLe9WNFaayR3JFJ1MGGUl4slZRyyzHN5LnJGGpN8uFsQE2Rqz2bLpz9lt+BEnVy0gSxyqvO5jnWTWyKVZpZIdSrhNLxLQpMr61X2JYMcqmIo87xhrFTTbSjTt8qvXk1GS6xS6v+Rzh6hdd5Go7iuqieedVHk3rh8425MnJrWdOt3M3h4eD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完成,如果项目需要完全可以做成工具类,使用的时候调用一下就可以

作者：彼岸舞

时间：2021\05\17

内容关于：工作中用到的小技术

本文属于作者原创,未经允许,禁止转发

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通过指定的URL获取返回图片的BASE64编码

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