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;
}
}
}