目录

[TOC]

依赖

1
2
3
4
5
<dependency>
    <groupId>com.googlecode.juniversalchardet</groupId>
    <artifactId>juniversalchardet</artifactId>
    <version>1.0.3</version>
</dependency>

工具类

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
import org.mozilla.universalchardet.UniversalDetector;

import java.io.IOException;
import java.io.InputStream;

/**
 * 文件编码工具类
 */
public class FileEncodingUtils {


    /**
     * 检测文件编码
     *
     * @return 文件编码
     */
    public static String detectFileEncoding(InputStream inputStream) throws IOException {
        UniversalDetector detector = new UniversalDetector(null);

        byte[] buffer = new byte[1024];
        int nread;
        while ((nread = inputStream.read(buffer)) > 0 && !detector.isDone()) {
            detector.handleData(buffer, 0, nread);
        }
        detector.dataEnd();

        String detectedCharset = detector.getDetectedCharset();
        if (detectedCharset == null) {
            // 如果检测不到编码，则使用默认编码
            detectedCharset = "UTF-8";
        }

        detector.reset();
        return detectedCharset;
    }
}