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;
}
}