java代码判断文件编码是否为utf-8
时间: 2023-10-05 19:14:43 浏览: 61
可以使用如下代码判断文件编码是否为UTF-8:
```java
import java.io.*;
import java.nio.charset.Charset;
public class FileEncodingChecker {
public static void main(String[] args) {
String filePath = "your/file/path.txt";
File file = new File(filePath);
Charset charset = getCharset(file);
if (charset == Charset.forName("UTF-8")) {
System.out.println("The file encoding is UTF-8.");
} else {
System.out.println("The file encoding is not UTF-8.");
}
}
private static Charset getCharset(File file) {
Charset charset = Charset.forName("UTF-8");
try {
FileInputStream fis = new FileInputStream(file);
byte[] buffer = new byte[1024];
UniversalDetector detector = new UniversalDetector(null);
int nread;
while ((nread = fis.read(buffer)) > 0 && !detector.isDone()) {
detector.handleData(buffer, 0, nread);
}
detector.dataEnd();
String encoding = detector.getDetectedCharset();
if (encoding != null) {
charset = Charset.forName(encoding);
}
detector.reset();
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
return charset;
}
}
```
其中,`getCharset` 方法使用 `juniversalchardet` 库来自动判断文件编码。如果文件编码是 UTF-8,则返回 `Charset.forName("UTF-8")`,否则返回自动检测到的编码。