Question

我将数据王byte[]中写入,只读一簇

public byte[] saveUrlAs(String photoUrl, String fileName)
{
byte buffer[] = new byte[5120];
try
{
URL url = new URL(photoUrl);
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
DataInputStream in = new DataInputStream(connection.getInputStream());
DataOutputStream out = new DataOutputStream(new FileOutputStream(fileName));
// for (int count = 0; (count = in.read(buffer)) > 0;)
// out.write(buffer, 0, count);
int leng=in.read(buffer);
while(in.read(buffer)!=-1){
out.write(buffer,0,leng);
leng=in.read(buffer);
}

out.close();
in.close();
//connection.disconnect();
}
catch (Exception e)
{
e.printStackTrace();
return null;
}
return buffer ;
}
就是无论多大，只读5kb,哪位大神给解决下，很急的

Answer 1

final int max=5120;
public  byte[] saveUrlAs(String photoUrl, String fileName){
    ByteArrayoutputStream bout=new ByteArrayoutputStream();
    try{
        URL url = new URL(photoUrl);
        HttpURLConnection connection = (HttpURLConnection)url.openConnection();
        DataInputStream in = new DataInputStream(connection.getInputStream());
        DataOutputStream out = new DataOutputStream(new FileOutputStream(fileName));
        byte buffer[] = new byte[1024];
        int len, size=0;
        while( (len=in.read(buffer))!=-1){ 
            if(size+len>max){
                out.write(buffer, 0, max-size); 
                bout.write(buffer, 0, max-size); 
                break;
            }else{
                out.write(buffer, 0, len);
                bout.write(buffer, 0, len);
            }
            size+=len;
        }
        out.close();
        in.close();
        //connection.disconnect();
    }catch (Exception e){
        e.printStackTrace();
        return null;
    }
    return bout.toByteArray();
}

是这个意思吗。