[Java] InputStream to OutputStream

Stream Read / Write

原始碼

1. import java.io.FileInputStream; 
2. import java.io.FileOutputStream; 
3. import java.io.InputStream; 
4. import java.io.OutputStream; 
5.  
6. public class StreamCopy1 { 
7.  
8.    public static void main(String[] args) throws Exception { 
9.  
10.        InputStream input = new FileInputStream("input.txt"); 
11.        OutputStream output = new FileOutputStream("output.txt"); 
12.  
13.        int byteValue; 
14.        while ((byteValue = input.read()) != -1) { 
15.            output.write(byteValue); 
16.        } 
17.  
18.        input.close(); 
19.        output.close(); 
20.    } 
21. } 

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

public class StreamCopy1 {

    public static void main(String[] args) throws Exception {

        InputStream input = new FileInputStream("input.txt");
        OutputStream output = new FileOutputStream("output.txt");

        int byteValue;
        while ((byteValue = input.read()) != -1) {
            output.write(byteValue);
        }

        input.close();
        output.close();
    }
}

Apache IOUtils.copy

原始碼

1. import java.io.FileInputStream; 
2. import java.io.FileOutputStream; 
3. import java.io.InputStream; 
4. import java.io.OutputStream; 
5.  
6. import org.apache.commons.io.IOUtils; 
7.  
8. public class StreamCopy2 { 
9.  
10.    public static void main(String[] args) throws Exception { 
11.  
12.        InputStream input = new FileInputStream("input.txt"); 
13.        OutputStream output = new FileOutputStream("output.txt"); 
14.  
15.        IOUtils.copy(input, output); 
16.  
17.        input.close(); 
18.        output.close(); 
19.    } 
20. } 

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.io.IOUtils;

public class StreamCopy2 {

    public static void main(String[] args) throws Exception {

        InputStream input = new FileInputStream("input.txt");
        OutputStream output = new FileOutputStream("output.txt");

        IOUtils.copy(input, output);

        input.close();
        output.close();
    }
}