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How to Read and Write UTF-8 File in Java?

The InputStreamReader and the OutputStreamWriter support UTF-8 character encoding. Here is example code:

public class Program {

public static void main(String... args) {

if (args.length != 2) {
return ;
}

try {
Reader reader = new InputStreamReader(
new FileInputStream(args[0]),"UTF-8");
BufferedReader fin = new BufferedReader(reader);
Writer writer = new OutputStreamWriter(
new FileOutputStream(args[1]), "UTF-8");
BufferedWriter fout = new BufferedWriter(writer);
String s;
while ((s=fin.readLine())!=null) {
fout.write(s);
fout.newLine();
}

//Remember to call close.
//calling close on a BufferedReader/BufferedWriter
// will automatically call close on its underlying stream
fin.close();
fout.close();

} catch (IOException e) {
e.printStackTrace();
}

}
}

You can run it:

c:\>java Program inputfilename outputfilename

Also, you can use Scanner which is provided by Java 5.0 to read UTF-8 file.


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