}publicintread()throwsIOException {byte[] tmpArray =newbyte[arraySize];intbytes = fileIn.read(tmpArray);//暂存到字节数组中if(bytes != -1) { array=newbyte[bytes];//字节数组长度为已读取长度System.arraycopy(tmpArray, 0, array, 0, bytes);//复制已读取数据returnbytes; }return-1; }public...
原文地址:http://www.baeldung.com/java-read-lines-large-file 1. Overview This tutorial will showhow to read all the lines from a large file in Javain an efficient manner. This article is part ofthe “Java – Back to Basic” tutorialhere on Baeldung. 2. Reading In Memory The standard w...
import java.io.File; import java.io.FileInputStream; import java.nio.ByteBuffer; import java.nio.channels.FileChannel; public class ReadLargeFileExample { public static void main(String[] args) { File file = new File("path/to/large/file.txt"); try (FileInputStream fis = new FileInputStrea...
代码示例 以下是一个使用FileInputStream分块读取大文件的示例代码: importjava.io.FileInputStream;importjava.io.IOException;publicclassLargeFileReader{privatestaticfinalintBUFFER_SIZE=1024*1024;// 1MBpublicstaticvoidreadLargeFile(StringfilePath){try(FileInputStreamfis=newFileInputStream(filePath)){byte[]buffe...
LargeFileReader : +readSpecificLine(filePath: String, lineNumber: int): String LargeFileReader : +main(args: String[]): void 总结 通过使用BufferedReader逐行读取文件内容,我们可以避免一次性加载整个文件到内存中的问题,从而更加高效地处理大型文件。在实际应用中,我们可以根据需要扩展readSpecificLine方法,实现...
This tutorial will show how to read all the lines from a large file in Java in an efficient manner. This article is part of the “Java – Back to Basic” tutorial here on Baeldung. Further reading: Java - Write an InputStream to a File How to write an InputStream to a File - ...
public class ReadLargeFile { public static void main(String[] args) { String filePath = "path/to/your/large/file"; try (BufferedReader br = new BufferedReader(new FileReader(filePath))) { String line; while ((line = br.readLine()) != null) { ...
1. Approach to Read Large Files Similar to theDOM parser and SAX parserfor XML files, we can read a file with two approaches: Reading the complete file in memory before processing it Reading the file content line by line and processing each line independently ...
5.2. Reading a Large File If we want to read a large file withFilesclass, we can use theBufferedReader. The following code reads the file using the newFilesclass andBufferedReader: @Test public void whenReadLargeFileJava7_thenCorrect() ...
importjava.io.BufferedReader;importjava.io.FileReader;importjava.io.IOException;publicclassReadLargeFile{publicstaticvoidmain(String[] args){// 指定文件路径StringfilePath="path/to/your/large/file.txt";// 使用try-with-resources语句自动关闭资源try(BufferedReaderreader=newBufferedReader(newFileReader(filePa...