import java.io.File;

import java.io.FileOutputStream;

import java.io.OutputStream;

import java.util.Calendar;

import java.util.Random;

import javax.servlet.http.HttpServletRequest;

import org.springframework.web.context.request.RequestContextHolder;

import org.springframework.web.context.request.ServletRequestAttributes;

import sun.misc.BASE64Decoder;

public class ImageUntil {

    public boolean saveBase64File(String username,String imgStr) {

        // 对字节数组字符串进行Base64解码并生成图片

        if (imgStr == null) // 图像数据为空

            return false;

        imgStr = imgStr.replaceAll("data:image/jpeg;base64,", "");

        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 fileName=username + ".jpg";

            HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();

            File f2=new File(System.getProperty("catalina.home")+ File.separator+"webapps"+File.separator+"uploadFile");

            boolean exists2 = f2.exists();

            if(!exists2){

                f2.mkdirs();

            }

            //String realPath=request.getSession().getServletContext().getRealPath("uploadFile/touxiang")+ File.separator;

            String tomcaturl=System.getProperty("catalina.home")+ File.separator+"webapps"+File.separator+"uploadFile"+File.separator+"touxiang"+ File.separator;

            File f1=new File(System.getProperty("catalina.home")+ File.separator+"webapps"+File.separator+"uploadFile"+File.separator+"touxiang");

            boolean exists = f1.exists();

            if(!exists){

                f1.mkdirs();

            }

            File file = new File(tomcaturl+fileName);

            OutputStream out = new FileOutputStream(file);

            out.write(b);

            out.flush();

            out.close();

            return true;

        } catch (Exception e) {

            e.printStackTrace();

            return false;

        }

    }

}