java从输入流中获取数据并返回字节数组示例

import java.io.bytearrayoutputstream;
import java.io.inputstream;
//从输入流中获取数据并以字节数组返回
public class streamtool {
    /**
     * 从输入流获取数据
     * @param inputstream
     * @return
     * @throws exception
     */
    public static byte[] readinputstream(inputstream inputstream) throws exception{
        byte[] buffer = new byte[1024];
        int len = -1;
        bytearrayoutputstream outputstream = new bytearrayoutputstream();
        while((len = inputstream.read(buffer)) != -1){
            outputstream.write(buffer, 0, len);
        }
        outputstream.close();
        inputstream.close();
        return outputstream.tobytearray();
    }
}