public static void readFileByBytes(String fileName) { File file = new File(fileName); InputStream in = null; try { System.out.println("以字节为单位读取文件内容,一次读一个字节:"); // 一次读一个字节 in = new FileInputStream(file); int tempbyte; while ((tempbyte = in.read()) !=...
File file=newFile(fileName); BufferedReader reader=null;try{ System.out.println("以行为单位读取文件内容,一次读一整行:"); reader=newBufferedReader(newFileReader(file)); String tempString=null;intline =1;//一次读入一行,直到读入null为文件结束while((tempString = reader.readLine()) !=null) {/...
reader=newInputStreamReader(newFileInputStream(fileName));//读入多个字符到字符数组中,charread为一次读取字符数while((charread = reader.read(tempchars)) != -1) {//同样屏蔽掉\r不显示if((charread ==tempchars.length)&& (tempchars[tempchars.length - 1] != '\r')) { System.out.print(temp...
Here is an example program to read a file line-by-line withFiles: ReadFileLineByLineUsingFiles.java packagecom.journaldev.readfileslinebyline;importjava.io.IOException;importjava.nio.file.Files;importjava.nio.file.Paths;importjava.util.List;publicclassReadFileLineByLineUsingFiles{publicstaticvoidmain...
reader = new BufferedReader(new FileReader(file)); String tempString = null; int line = 1; // 一次读入一行,直到读入null为文件结束 while ((tempString = reader.readLine()) != null) { body.append(tempString); body.append("\n");//换行符 ...
4. Reading a File Line by Line usingFileReader[Legacy] Till Java 7, we could read a file usingFileReaderin various ways. This has been mentioned for reference only, and shall not be used in Java 8 or later, as it provides no additional benefit for this usecase. ...
1. Read File Line by Line using BufferedReader In this example, we have a text file named samplefile.txt, and we will read contents of this file, line by line, using BufferedReader class. samplefile.txt This is first line. This is second line. ...
while ((line = reader.readLine()) != null ) { //separate all csv fields into string array String[] lineVariables = line.split(","); } } catch (IOException e) { System.err.println(e); } #5楼 Java-9: try (Stream<String> stream = Files.lines(Paths.get(fileName))) { ...
readLine()是读取流读数据的时候用的，同时会以字符串形式返回这一行的数据，当读取完所有的数据时会返回null。代码示例：public static void main(String[] args) throws Exception { //获取读取流 3 FileReader reader = new FileReader("C:\\Users\\杨华彬\\Desktop\\test.txt");BufferedReader br...
try(BufferedReader br=newBufferedReader(newFileReader(file))){String line;while((line=br.readLine())!=null){// process the line.}} You can read the data faster if you assume there is no character encoding. e.g. ASCII-7 but it won't make much difference. It is highly likely that wh...