First, we’ll learn how to load a file from the classpath, a URL, or from a JAR file using standard Java classes. Second, we’ll see how to read the content withBufferedReader,Scanner,StreamTokenizer,DataInputStream,SequenceInputStream,andFileChannel. We will also discuss how to read a U...
+ResourceReader(String filePath) +getInputStream() : InputStream +readContent() : String +close() : void } 在类图中,ResourceReader是一个用于读取资源文件的类。它包含一个私有字段filePath表示资源文件的路径,一个私有字段inputStream表示资源文件的输入流。ResourceReader类提供了getInputStream()方法用于获...
下面是一个Java读取文件的优化对比代码: importjava.io.BufferedReader;importjava.io.FileReader;importjava.io.IOException;publicclassFileReadOptimized{publicstaticvoidmain(String[]args){Stringpath="example.txt";try(BufferedReaderbr=newBufferedReader(newFileReader(path))){Stringline;while((line=br.readLine()...
try (SeekableByteChannel ch = java.nio.file.Files.newByteChannel(Paths.get(fileName), StandardOpenOption.READ)) { ByteBuffer bf = ByteBuffer.allocate(1000); while (ch.read(bf) > 0) { bf.flip(); // System.out.println(new String(bf.array())); bf.clear(); } } As shown above, th...
In this post, we will learn about how to read a file from java with example There are many ways to read a file from java. BufferedReader, Scanner, Streams
I have placed a file data.txt at location c:/temp. I will read this file in all 3 examples.准备一个文件,文件名为data.txt,放到c:/temp目录下面,然后会用三种方法把文件内容读出来 File content in c:/temp/data.txt文件内容如下 welcome to howtodoinjava.com blog. Learn to grow. ...
1 package cn.com.qmhd.tools; 2 3 import java.io.FileInputStream; 4 import java.io.FileNotFoundException; 5 import java.io.FileOutputStream; 6 import j
Java – Read from File 1. Overview In this tutorial we’ll explore different ways to read from a File in Java; we’ll make use ofBufferedReader, Scanner, StreamTokenizer, DataInputStream, SequenceInputStream andFileChannel. Then, we will discuss how to read a UTF-8 encoded file and how ...
Path link = Files.readSymbolicLink(path); System.out.println(link); }*/}catch(IOException e) { e.printStackTrace(); } } } 输出 [Path] : /home/mkyong/test/file.txt path : /home/mkyong/test/file.txt path.toAbsolutePath() : /home/mkyong/test/file.txt ...
*/ public abstract int read() throws IOException; 4.用FileInputStream向文件中写入内容的步骤: 1)建立File对象:File in=new File(String pathname) 2)构造字符串:String text=“XXXXX” 3)字符串转byte,并指定编码方式:byte[] a=text.getBytes(“UTF-8”) 4)建立文件输出流:FileOutputStream o=new ...