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Map dataMap = new HashMap();

String filepath="D:/tou.jpg";

BASE64Decoder decoder = new BASE64Decoder();

try {

byte[] b = decoder.decodeBuffer(filepath);

for(int i=0;i

if(b[i]<0) {//调整异常数据

b[i]+=256;

}

}

//生成图片

File imgFile=new File(filepath);

String fileExt = imgFile.getName().substring(

imgFile.getName().lastIndexOf(".") + 1).toLowerCase();

SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");

String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000)+"."+fileExt;

String savePath= getRequest().getServletContext().getRealPath("/upload/appImg/");

File dirFile = new File(savePath);

if (!dirFile.exists()) {

dirFile.mkdirs();

}

String imgFilePath = getRequest().getServletContext().getRealPath("/upload/appImg")+"/" +newFileName;//新生成的图片

String url="/upload/appImg/"+newFileName;

OutputStream out = new FileOutputStream(imgFilePath);

out.write(b);

out.flush();

out.close();

dataMap.put("success", "上传成功");

dataMap.put("url",url);

ReturnJson.goBack(dataMap);

}catch (IOException e) {

dataMap.put("error", "上传失败");

ReturnJson.goBack(dataMap);

e.printStackTrace();

}