📅  最后修改于: 2020-11-18 08:14:44             🧑  作者: Mango
提供用于读取,写入和复制文件的实用程序方法。该方法适用于InputStream,OutputStream,Reader和Writer。
以下是org.apache.commons.io.IOUtils类的声明-
public class IOUtils
extends Object
这是我们需要解析的输入文件-
Welcome to TutorialsPoint. Simply Easy Learning.
IOTester.java
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.commons.io.IOUtils;
public class IOTester {
public static void main(String[] args) {
try {
//Using BufferedReader
readUsingTraditionalWay();
//Using IOUtils
readUsingIOUtils();
} catch(IOException e) {
System.out.println(e.getMessage());
}
}
//reading a file using buffered reader line by line
public static void readUsingTraditionalWay() throws IOException {
try(BufferedReader bufferReader
= new BufferedReader( new InputStreamReader(
new FileInputStream("input.txt") ) )) {
String line;
while( ( line = bufferReader.readLine() ) != null ) {
System.out.println( line );
}
}
}
//reading a file using IOUtils in one go
public static void readUsingIOUtils() throws IOException {
try(InputStream in = new FileInputStream("input.txt")) {
System.out.println( IOUtils.toString( in , "UTF-8") );
}
}
}
它将打印以下结果。
Welcome to TutorialsPoint. Simply Easy Learning.
Welcome to TutorialsPoint. Simply Easy Learning.