Java 9中InputStream的transferTo()方法的重要性？
在Java9中，transferTo()方法已添加到InputStream 类中。该方法已用于在Java中将数据从输入流复制到输出流。这意味着它将从输入流中读取所有字节，然后按读取顺序将字节写入输出流。
语法
public long transferTo(OutputStream out) throws IOException
示例
import java.util.Arrays;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
public class TransferToMethodTest {
public void testTransferTo() throws IOException {
byte[] inBytes = "nhooo".getBytes();
ByteArrayInputStream bis = new ByteArrayInputStream(inBytes);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
bis.transferTo(bos);
byte[] outBytes = bos.toByteArray();
System.out.println(Arrays.equals(inBytes, outBytes));
} finally {
try {
bis.close();
} catch(IOException e) {
e.printStackTrace();
}
try {
bos.close();
} catch(IOException e) {
e.printStackTrace();
}
}
}
public static void main(String args[]) throws Exception {
TransferToMethodTest test = new TransferToMethodTest();
test.testTransferTo();
}
}输出结果
true