Java以UTF-8格式讀寫及追加寫檔案樣本

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package test;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;public class FileHelper {        public static void readFile(File file) throws IOException {        BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8"));        String line = null;           while ((line = br.readLine()) != null) {            System.out.println(line);        }      }        public static void writeFile(File file, String content) throws IOException {        FileOutputStream fos = new FileOutputStream(file);        OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");        osw.write(content);        osw.flush();    }        public static void appendFile(File file, String content) throws IOException {        OutputStreamWriter out = new OutputStreamWriter(                new FileOutputStream(file, true), // true to append                "UTF-8"                );        out.write(content);        out.close();    }        // main for test    public static void main(String[] args) throws IOException {        File file = new File("D:\\test.txt");        writeFile(file, "");        appendFile(file, "你好");        appendFile(file, "!!!");        readFile(file);    }}

Java以UTF-8格式讀寫及追加寫檔案樣本