FileInputStream类包含一个方法read()
,该方法接受字节数组作为参数,并将文件输入流的数据读取到给定的字节数组。假设文件myData包含以下数据-
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import java.io.File; import java.io.FileInputStream; public class FileToByteArray { public static void main(String args[]) throws Exception{ File file = new File("myData"); FileInputStream fis = new FileInputStream(file); byte[] bytesArray = new byte[(int)file.length()]; fis.read(bytesArray); String s = new String(bytesArray); System.out.println(s); } }
输出结果
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