readUsingFiles(fileName); //使用Scanner类来处理大文件,逐行读取 readUsingScanner(fileName); //使用BufferedReader读取,逐行读取 readUsingBufferedReader(fileName); readUsingBufferedReaderJava7(fileName, StandardCharsets.UTF_8); readUsingBufferedReader(fileName, StandardCharsets.UTF_8); //使用FileReader...
FileReader(FileDescriptorfd) 在给定从中读取数据的文件名的情况下创建一个新 FileReader。 FileReader(StringfileName) 创建FIleReader对象成功后,可以参照以下列表里的方法操作文件。 实例 实例 importjava.io.*;publicclassFileRead{publicstaticvoidmain(Stringargs[])throwsIOException{Filefile=newFile("Hello1.txt");...
1. 使用流读取文件 public static void stream() { String fileName = "D:\\test.txt"; final String CHARSET_NAME = "UTF-8"; List<String>
1、BufferedReader importjava.io.BufferedReader;importjava.io.FileReader;importjava.io.IOException;publicclassReadFileLineByLineUsingBufferedReader {publicstaticvoidmain(String[] args) { BufferedReader reader;try{ reader=newBufferedReader(newFileReader("/Users/test/Downloads/myfile.txt")); String line=r...
Read all lines from a file. This method ensures that the file is closed when all bytes have been read or an I/O error, or other runtime exception, is thrown. Bytes from the file are decoded into characters using the specified charset. ...
double x = din.readDouble(); 正如FileInputStream没有任何读入数值的方法一样,DataInputStream也没有任何从文件中获取数据的方法。 Java使用了一种灵巧的机制来分离这两种职责。某些输入流(例如FileInputStream和由URL类的openStream方法返回的输入流)可以从文件和其他更外部的位置上获取字节,而其他的输入流(例如Dat...
在示例中,我们首先创建了一个FileInputStream对象,并用它创建了一个InputStreamReader对象。在创建InputStreamReader对象时,我们指定了文件的编码方式为UTF-8。然后,我们再创建了一个BufferedReader对象,用于逐行读取文件内容。最后,我们调用close()方法关闭流。
(alname,"4");}read.close();//输入流关闭}publicstaticvoidoutFile()throws IOException{OutputStreamWriter pw=null;//定义一个流pw=newOutputStreamWriter(newFileOutputStream("D:\\musicData.txt"),"UTF-8");//确认流的输出文件和编码格式System.out.println("开始合并去重:");for(int i=0;i<outMap...
Read all lines from a file. static List<String> readAllLines(Path path, Charset cs) Read all lines from a file. static <A extends BasicFileAttributes>A readAttributes(Path path, Class<A> type, LinkOption... options) Reads a file's attributes as a bulk operation. static Map<String,Obje...
clone,equals,finalize,getClass,hashCode,notify,notifyAll,toString,wait,wait,wait Constructor Detail FileReader public FileReader(StringfileName) throwsFileNotFoundException Creates a newFileReader, given the name of the file to read, using the platform'sdefault charset. ...