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StackOverflow 文档
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Java Language 教程
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字符编码
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从以 UTF-8 编码的文件中读取文本
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
public class ReadingUTF8TextFile {
public static void main(String[] args) throws IOException {
//StandardCharsets is available since Java 1.7
//for ealier version use Charset.forName("UTF-8");
try (BufferedWriter wr = Files.newBufferedWriter(Paths.get("test.txt"), StandardCharsets.UTF_8)) {
wr.write("Strange cyrillic symbol Ы");
}
/* First Way. For big files */
try (BufferedReader reader = Files.newBufferedReader(Paths.get("test.txt"), StandardCharsets.UTF_8)) {
String line;
while ((line = reader.readLine()) != null) {
System.out.print(line);
}
}
System.out.println(); //just separating output
/* Second way. For small files */
String s = new String(Files.readAllBytes(Paths.get("test.txt")), StandardCharsets.UTF_8);
System.out.print(s);
}
}