SpringBoot 中检测文件编码格式

SpringBoot 中检测文件编码格式

引入相关依赖

<dependency>  
    <groupId>org.apache.commons</groupId>  
    <artifactId>commons-lang3</artifactId>  
    <version>3.6</version>  
</dependency>
<dependency>  
    <groupId>com.googlecode.juniversalchardet</groupId>  
    <artifactId>juniversalchardet</artifactId>  
    <version>1.0.3</version>  
</dependency>

工具类

import org.apache.commons.lang3.StringUtils;  
import org.mozilla.universalchardet.UniversalDetector;  
  
import java.io.*;  
import java.nio.file.Files;
  
public class FileUtils {  
    /**  
     * 自动检测文件的编码格式  
     *  
     * @param file 需要检测的文件  
     * @return encoding 编码格式，默认为 UTF-8  
     * @throws IOException  
     */    
     public static String detectFileEncoding(File file) throws IOException {  
        String encoding = null;  
        try (BufferedInputStream bis = new BufferedInputStream(Files.newInputStream(file.toPath()))) {  
            UniversalDetector detector = new UniversalDetector(null);  
            byte[] buf = new byte[4096];  
            int len;  
            while ((len = bis.read(buf)) != -1 && !detector.isDone()) {  
                detector.handleData(buf, 0, len);  
            }  
            detector.dataEnd();  
            encoding = detector.getDetectedCharset();  
            detector.reset();  
        }  
        return !StringUtils.isBlank(encoding) ? encoding : "UTF-8";  
    }  
}