private static String getCharsetFromText(byte[] content,
            String declaredCharset, int maxLengthCharsetDetection) {
        String charset = null;
        // filter HTML tags
        CharsetDetector charsetDetector = new CharsetDetector();
        charsetDetector.enableInputFilter(true);
        // give it a hint
        if (declaredCharset != null)
            charsetDetector.setDeclaredEncoding(declaredCharset);
        // trim the content of the text for the detection
        byte[] subContent = content;
        if (maxLengthCharsetDetection != -1
                && content.length > maxLengthCharsetDetection) {
            subContent = Arrays.copyOfRange(content, 0,
                    maxLengthCharsetDetection);
        }
        charsetDetector.setText(subContent);
        try {
            CharsetMatch charsetMatch = charsetDetector.detect();
            charset = validateCharset(charsetMatch.getName());
        } catch (Exception e) {
            charset = null;
        }
        return charset;
    }
private static String getCharsetFromText(byte[] content,
            String declaredCharset, int maxLengthCharsetDetection) {
        String charset = null;
        
        CharsetDetector charsetDetector = new CharsetDetector();
        charsetDetector.enableInputFilter(true);
        
        if (declaredCharset != null)
            charsetDetector.setDeclaredEncoding(declaredCharset);
        
        byte[] subContent = content;
        if (maxLengthCharsetDetection != -1
                && content.length > maxLengthCharsetDetection) {
            subContent = Arrays.copyOfRange(content, 0,
                    maxLengthCharsetDetection);
        }
        charsetDetector.setText(subContent);
        try {
            CharsetMatch charsetMatch = charsetDetector.detect();
            charset = validateCharset(charsetMatch.getName());
        } catch (Exception e) {
            charset = null;
        }
        return charset;
    }
private static String getCharsetFromText ( byte [ ] content , String declaredCharset , int maxLengthCharsetDetection ) { String charset = null ; // filter HTML tags CharsetDetector charsetDetector = new CharsetDetector ( ) ; charsetDetector . enableInputFilter ( true ) ; // give it a hint if ( declaredCharset != null ) charsetDetector . setDeclaredEncoding ( declaredCharset ) ; // trim the content of the text for the detection byte [ ] subContent = content ; if ( maxLengthCharsetDetection != - 1 && content . length > maxLengthCharsetDetection ) { subContent = Arrays . copyOfRange ( content , 0 , maxLengthCharsetDetection ) ; } charsetDetector . setText ( subContent ) ; try { CharsetMatch charsetMatch = charsetDetector . detect ( ) ; charset = validateCharset ( charsetMatch . getName ( ) ) ; } catch ( Exception e ) { charset = null ; } return charset ; }
Use a third party library as last resort to guess the charset from the
bytes.
Use a third party library as last resort to guess the charset from the bytes .