package com.net.util; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import javax.servlet.http.HttpServletRequest; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; /** * 图片base64转码工具类 * @author zhangdi * */ public class ImageBase64Util { /** * 图片转化成base64字符串 * @param imgPath 图片路径 * @return */ public static String GetImageStr(String imgPath) { // 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 = imgPath; 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(); // 返回Base64编码过的字节数组字符串 return encoder.encode(data); } /** * base64字符串转化成图片 * @param imgStr base64字符串 * @param imgPath 图片路径 * @return */ public static boolean GenerateImage(String imgStr,String imgPath,HttpServletRequest request) { //获得物理路径webapp所在路径 String pathRoot = request.getSession().getServletContext().getRealPath(""); // 对字节数组字符串进行Base64解码并生成图片 if (imgStr == null) 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; } } // 生成新的图片 String imgFilePath =pathRoot+imgPath; OutputStream out = new FileOutputStream(imgFilePath); out.write(b); out.flush(); out.close(); return true; } catch (Exception e) { return false; } } }
时间: 2024-10-16 23:21:34