下载图片代码片段
因项目需求写了个下载图片的函数,现记录下来
实现原理其实很简单就是先打开再通过二进制流读取,不需要第三方jar包
/** * 下载图片 * @return */private boolean downimg(String jpgurl,String jpgfile,String link){try {//若获取图片的链接结尾不为/或\则在结尾添加一个/if(!((link.substring(link.length()-1,link.length()).equals("/"))||(link.substring(link.length()-1,link.length()).equals("\")))){link=link+"/";}setmonitor();String str = "",path="",filename=jpgfile;jpgfile=jpgfile.replaceAll("http://", "").trim();int xiegan = -1;xiegan=jpgurl.indexOf("http://");if(xiegan==-1){jpgurl=link+jpgurl;}xiegan = jpgfile.indexOf("/");while (xiegan != -1) {str = jpgfile.substring(0, xiegan+1);jpgfile = jpgfile.substring(xiegan + 1);path += str;mkdir(path);xiegan = jpgfile.indexOf("/");}str="";xiegan=jpgurl.length();while(!jpgurl.substring(xiegan-1,xiegan).equals("/")){str=jpgurl.substring(xiegan-1,xiegan)+str;xiegan--;} //这段是下载图片的代码,有需要的只用看这段就行了 //---------------------------------------------URL url = new URL(jpgurl);URLConnection con = url.openConnection();con.setReadTimeout(1000*5);InputStream is = con.getInputStream();byte[] bs = new byte[1024];int len;OutputStream os = new FileOutputStream(filename.replaceAll("http://", "").trim()+"/"+str);while ((len = is.read(bs)) != -1) {os.write(bs, 0, len);}os.close();is.close(); //-----------------------------------------------imginistr+="url"+imgsum+"="+link+";";imginistr+="img"+imgsum+"=/"+(filename.replaceAll("http://", "").trim()+"/"+str+";").replaceAll("//", "/");imginistr+="imgurl"+imgsum+"="+jpgurl+";";imgsum++;return true;} catch (Exception e) {down_Frame.showtxt.setText(down_Frame.showtxt.getText()+"下载图片出错:"+e.getMessage()+"\n");return false;}}