网络图片获取工具类

import com.manage.utils.MD5Util;
import org.apache.wicket.common.utils.DateUtils;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;

public class UrlImg {

    /**
     *
     * @param url 网络图片地址
     * @param filePath 保存图片的父级文件夹路径
     * @return
     */
    public String downloadImgByUrl(String url, String filePath) {
        FileOutputStream fos=null;
        BufferedInputStream bis = null;
        HttpURLConnection httpUrl=null;
        URL netUrl = null;
        String  fileName="";
        try {
            netUrl = new URL(url);
            httpUrl = (HttpURLConnection) netUrl.openConnection();
            httpUrl.connect();
            bis = new BufferedInputStream(httpUrl.getInputStream());
            String time = DateUtils.getTimeRandom("yyMMddhhmmss");
            fileName = MD5Util.MD5(time) + ".gif";//图片的类型，我默认设定为jpg格式；可以自定义文件类型的，网络图片地址应该会有图片类型的，这里就需要你自己去看一下网络图片地址的规则了
            filePath =filePath+"/"+fileName;
            File outFile = new File(filePath);

            if (!outFile.exists()) {
                outFile.createNewFile();
            }
            fos=new FileOutputStream(outFile);
            byte[] buffer = new byte[3042];
            int bytesRead = 0;
            while ((bytesRead = bis.read(buffer)) != -1) {
                fos.write(buffer, 0, bytesRead);
            }
            fos.close();
            bis.close();



        } catch (Exception e) {

              e.getMessage();
              System.out.print("请确认网络图片是否正确！");
        }
        return fileName;
    }

    public static void  main(String [] args){

        new UrlImg().downloadImgByUrl("http://img0.pconline.com.cn/pconline/1411/04/5676078_2013123010564417351_thumb.gif","D:\\二维码");
    }
}