java 图片转字符串?
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class="java">package com.baoy.cn; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; public class FileReadTest { public static boolean download(String imgStr,String imgFile) throws Exception { 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 = imgFile;// 新生成的图片 OutputStream out = new FileOutputStream(imgFilePath); out.write(b); out.flush(); out.close(); return true; } catch (Exception e) { throw e; } } public static String upload(String imgFile) throws IOException { 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); } catch (IOException e) { e.printStackTrace(); } finally { try { in.close(); } catch (IOException e) { e.printStackTrace(); } } // 对字节数组Base64编码 BASE64Encoder encoder = new BASE64Encoder(); return encoder.encode(data); } @SuppressWarnings("resource") public static void main(String[] args) throws Exception { String imgFile = "C:\\Users\\baoy\\Desktop\\1.png"; // 声明File对象 String imgFile2 = "C:\\Users\\baoy\\Desktop\\2.png"; // 声明File对象 String upload = upload(imgFile); System.out.println(upload); File file = new File("C:\\Users\\baoy\\Desktop\\1.txt"); FileWriter fileWriter = new FileWriter(file); fileWriter.write(upload); fileWriter.flush(); boolean download = download(upload, imgFile2); System.out.println(download); } }
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