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[]readFileToByteArray(StringfilePath){byte[]fileBy...
Java Code: importjava.io.FileInputStream;importjava.io.FileNotFoundException;importjava.io.IOException;importjava.io.InputStream;// Reading contents from a file into byte array.publicclassExercise10{publicstaticvoidmain(Stringa[]){Stringfile_name="/home/students/test.txt";InputStreamfins=null;try{...
在这个示例中,readFileToByteArray方法接受一个文件路径作为参数,并返回一个包含文件内容的byte数组。如果文件不存在或太大而无法放入byte数组中,则会抛出异常。在main方法中,我们调用了readFileToByteArray方法,并打印了一条消息来确认文件内容已成功读取。你可以将filePath变量的值替换为你想要读取的文件的实际路径。
File file=ResourceUtils.getFile(path);//init array with file lengthbyte[] bytesArray =newbyte[(int) file.length()];try{ FileInputStream fis=newFileInputStream(file); fis.read(bytesArray);//read file into bytes[]fis.close(); }catch(IOException e) { e.printStackTrace(); }returnbytesArray...
Reading data into byte array User uploads data Writing byte array to file Application processes the byte array Application creates File and writes data Completion File is created successfully Byte Array to File Journey 通过以上示例和解释,相信你已经掌握了如何将byte数组转换为File的方法。希望你在未来的...
FileOutputStream(someFile);fos.write(bytes);fos.flush();fos.close();}} Why would someone like to convert a file to byte array? There are various applications of this conversion. For example, convert file into byte to save into database,transfer file to other system using web service, ...
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...
import java.io.ByteArrayOutputStream;import java.io.IOException;import java.nio.ByteBuffer;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import java.util.stream.Collectors; publicclassFileSplitter{ publicstaticvoidmain(String[] ...
ByteArrayOutputStream 构造函数 属性 方法 CharArrayReader CharArrayWriter CharConversionException Console DataInputStream DataOutputStream EOFException File FileDescriptor FileInputStream FileNotFoundException FileOutputStream FilePermission FileReader FileWriter
public class StringToByteArray { public static void main(String[] args) { String str = "PANKAJ"; byte[] byteArr = str.getBytes(); // print the byte[] elements System.out.println("String to byte array: " + Arrays.toString(byteArr)); ...