private static String readString3() { String str= "" ; File file= new File(FILE_IN); try { FileInputStream in= new FileInputStream(file); // size 为字串的长度 ,这里一次性读完 int size=in.available(); byte [] buffer= new byte [size]; in.read(buffer); in.close(); str= new ...
package com.learnfile; import java.io.*; import java.nio.charset.StandardCharsets; public class ReadStringFromFileAppMain { private static final String SOURCE_FILE_NAME = "file1.txt"; public static void main(String[] args) { File sourceFile = new File("." + File.separator + SOURCE_FILE...
importjava.io.BufferedReader;importjava.io.File;importjava.io.FileReader;importjava.io.IOException;publicclassFileToStringExample{publicstaticStringreadFileToString(StringfilePath)throwsIOException{StringBuildersb=newStringBuilder();Filefile=newFile(filePath);BufferedReaderbr=newBufferedReader(newFileReader(file))...
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...
void println(String x):打印一行字符串。 void write(byte[] buf,int off,int len):将len字节从知道那个的初始偏移量为off的byte数组中写入此流。 2. 读取文件byte内容并输出到控制台 读取文件byte内容的处理流程:由文件的File对象生成FileInputStream对象 --> FileInputStream对象调用read函数将文件内容读入byte...
readAllBytes()method reads all the bytes from a file. The method ensures that the file is closed when all bytes have been read or an I/O error, or other runtime exception, is thrown. After reading all bytes, we pass those bytes toStringclass constructor to create a string. ...
"); } } private String readFileFromServer() throws Exception { // 这里是读...
Read file line by line PathfilePath=Path.of("c:/temp/demo.txt");StringfileContent="";StringBuildercontentBuilder=newStringBuilder();try(BufferedReaderbr=newBufferedReader(newFileReader(filePath))){StringsCurrentLine;while((sCurrentLine=br.readLine())!=null){contentBuilder.append(sCurrentLine).appe...
FileReader(File file) FileReader(String fileName) InputStreamReader(InputStream in) //接收键盘输入作为输入流,把输入流放到缓冲流里面 BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); BufferReader in=new BufferReader(new FileReader(name)) ...
nullReader,read,read,transferTo クラス java.lang.Objectで宣言されたメソッド clone,equals,finalize,getClass,hashCode,notify,notifyAll,toString,wait,wait,wait コンストラクタの詳細 StringReader public StringReader(Strings) 新しい文字列リーダーを作成します。