打开文件输入流,读取文件内容; 将文件内容写入到一个byte数组中; 关闭文件输入流。 下面将通过一个示例来演示如何实现这一功能。 代码示例 importjava.io.File;importjava.io.FileInputStream;importjava.io.IOException;publicclassFileToByteArray{publicstaticbyte[]read
importjava.io.*;publicclassFileToByteArray{publicstaticbyte[]fileToByteArray(StringfilePath){Filefile=newFile(filePath);try(FileInputStreamfis=newFileInputStream(file);ByteArrayOutputStreambos=newByteArrayOutputStream()){byte[]buffer=newbyte[1024];intlength;while((length=fis.read(buffer))!=-1){...
该方法的javadoc是这样说的：public static byte[] toByteArray(File file) throws IOException将文件中...
第一步获取文件的byte信息，第二步通过MessageDigest类进行MD5加密，第三步转换成16进制的MD5码值。几种...
java readfiletobytearray 文心快码BaiduComate 在Java中,将文件内容读取到字节数组(ByteArray)可以通过多种方式实现。以下是几种常见的方法,每种方法都遵循了您提供的提示步骤: 方法一:使用FileInputStream java import java.io.File; import java.io.FileInputStream; import java.io.IOException; public class ...
If you need Java code to convert a file to a byte array and then convert it back, this will work for you! First, to convert a file to byte array, ByteArrayOutputStream class is used. This class implements an output stream in which the data is written into a byte array. The buffer...
Filefile=newFile("C:/temp/test.txt");byte[]bytes=newbyte[(int)file.length()];try(FileInputStreamfis=newFileInputStream(file)){fis.read(bytes);} 3. UsingApache Commons IO Another good way to read data into a byte array is in theapache commons IOlibrary. It provides several useful cla...
Write a Java program to read the contents of a file into a byte array. Sample Solution: Java Code: importjava.io.FileInputStream;importjava.io.FileNotFoundException;importjava.io.IOException;importjava.io.InputStream;// Reading contents from a file into byte array.publicclassExercise10{publicst...
FileInputStream fis=newFileInputStream(file); ByteArrayOutputStream bos=newByteArrayOutputStream(1000);byte[] b =newbyte[1000];intn;while((n = fis.read(b)) != -1) { bos.write(b,0, n); } fis.close(); bos.close(); buffer=bos.toByteArray(); ...
10 baos = new ByteArrayOutputStream(2048);11 byte[] e = new byte[1024];12 13 intlen;14 while ((len = fis.read(e)) != -1) {15 baos.write(e, 0, len);16 }17 18 data =baos.toByteArray();19 System.out.println("此时的data is:" +Arrays.toString(data));20 } catch(IOExcept...