src/org/nutz/lang/Streams.java
public static long write(OutputStream ops, InputStream ins) throws IOException {
        return write(ops, ins, BUF_SIZE);
    }
public static long write(OutputStream ops, InputStream ins) throws IOException {
        return write(ops, ins, BUF_SIZE);
    }
将输入流写入一个输出流。块大小为 8192
<p>
<b style=color:red>注意</b>，它并不会关闭输入/出流

@param ops
输出流
@param ins
输入流

@return 写入的字节数
@throws IOException