FileReader用于打开文件并创建输入流,BufferedReader用于包装输入流以提供缓冲功能和一次读取一行的特性。通过循环读取每一行,并将其追加到StringBuilder中,最终将StringBuilder转换为String对象并返回。 2. 使用Files类 AI检测代码解析 importjava.io.IOException;importjava.nio.charset.StandardCharsets;importjava.nio.file.F...
AI检测代码解析 importjava.io.BufferedReader;importjava.io.FileReader;importjava.io.IOException;publicclassLargeFileToStringExample{publicstaticvoidmain(String[]args){StringfilePath="large_example.txt";// 大文件路径try{Stringcontent=readLargeFileToString(filePath);System.out.println(content);// 输出文件内...
import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; public class FileToStringExample { public static void main(String[] args) { File file = new File("path/to/your/file.txt"); try (BufferedReader bufferedReader = new BufferedReader(new...
public FileReader(String fileName, Charset charset) throws IOException Creates a new FileReader, given the name of the file to read and the charset. Parameters: fileName - the name of the file to read charset - the charset Throws: IOException - if the named file does not exist, is a dire...
Learn to read file to string in java. Examples use Files.readAllBytes, Files.lines and FileReader & BufferedReader to read file content. 学习读取文件,并赋值到String中。 示例使用 Files.readAllBytes Files.lines FileReader&BufferedReader 读取文件内容。
PathfilePath=Path.of("c:/temp/demo.txt");StringfileContent="";StringBuildercontentBuilder=newStringBuilder();try(BufferedReaderbr=newBufferedReader(newFileReader(filePath))){StringsCurrentLine;while((sCurrentLine=br.readLine())!=null){contentBuilder.append(sCurrentLine).append("\n");}}catch(IOEx...
@TestvoidtestReadFile6()throws IOException{String fileName="D:\data\test\newFile3.txt";// 带缓冲的流读取,默认缓冲区8ktry(BufferedReader br=newBufferedReader(newFileReader(fileName))){String line;while((line=br.readLine())!=null){System.out.println(line);}}//java 8中这样写也可以try(Buff...
FileReader(String fileName) : 创建一个新的 FileReader ,给定要读取的文件的名称 Reader常用方法: 1,读取单个字符 int read():每次可以读取一个字符的数据,提升为int类型,读取到文件末尾,返回 -1 2,使用字符数组读取数据,intread(char[] cbuf),每次读取b的长度个字符到数组中,返回读取到的有效字符个数,读取...
String fileName = "D:\\data\\test\\newFile4.txt"; try (Scanner sc = new Scanner(new FileReader(fileName))) { while (sc.hasNextLine()) { //按行读取字符串 String line = sc.nextLine(); System.out.println(line); } } try (Scanner sc = new Scanner(new FileReader(fileName))) { ...
importjava.io.File;importjava.io.FileReader;importjava.io.IOException;publicclassFileToStringExample{publicstaticvoidmain(String[]args){Filefile=newFile("path/to/file.txt");FileReaderfileReader=null;try{fileReader=newFileReader(file);char[]charArray=newchar[(int)file.length()];fileReader.read(charArr...