common_helper/src/main/java/com/xiongyingqi/util/MimeTypeUtils.java
public static MimeType parseMimeType(String mimeType) {
        if (!StringUtils.hasLength(mimeType)) {
            throw new InvalidMimeTypeException(mimeType, "'mimeType' must not be empty");
        }
        String[] parts = StringUtils.tokenizeToStringArray(mimeType, ";");

        String fullType = parts[0].trim();
        // java.net.HttpURLConnection returns a *; q=.2 Accept header
        if (MimeType.WILDCARD_TYPE.equals(fullType)) {
            fullType = "*/*";
        }
        int subIndex = fullType.indexOf('/');
        if (subIndex == -1) {
            throw new InvalidMimeTypeException(mimeType, "does not contain '/'");
        }
        if (subIndex == fullType.length() - 1) {
            throw new InvalidMimeTypeException(mimeType, "does not contain subtype after '/'");
        }
        String type = fullType.substring(0, subIndex);
        String subtype = fullType.substring(subIndex + 1, fullType.length());
        if (MimeType.WILDCARD_TYPE.equals(type) && !MimeType.WILDCARD_TYPE.equals(subtype)) {
            throw new InvalidMimeTypeException(mimeType, "wildcard type is legal only in '*/*' (all mime types)");
        }

        Map<String, String> parameters = null;
        if (parts.length > 1) {
            parameters = new LinkedHashMap<String, String>(parts.length - 1);
            for (int i = 1; i < parts.length; i++) {
                String parameter = parts[i];
                int eqIndex = parameter.indexOf('=');
                if (eqIndex != -1) {
                    String attribute = parameter.substring(0, eqIndex);
                    String value = parameter.substring(eqIndex + 1, parameter.length());
                    parameters.put(attribute, value);
                }
            }
        }

        try {
            return new MimeType(type, subtype, parameters);
        } catch (UnsupportedCharsetException ex) {
            throw new InvalidMimeTypeException(mimeType, "unsupported charset '" + ex.getCharsetName() + "'");
        } catch (IllegalArgumentException ex) {
            throw new InvalidMimeTypeException(mimeType, ex.getMessage());
        }
    }
public static MimeType parseMimeType(String mimeType) {
        if (!StringUtils.hasLength(mimeType)) {
            throw new InvalidMimeTypeException(mimeType, "'mimeType' must not be empty");
        }
        String[] parts = StringUtils.tokenizeToStringArray(mimeType, ";");

        String fullType = parts[0].trim();
        // java.net.HttpURLConnection returns a *; q=.2 Accept header
        if (MimeType.WILDCARD_TYPE.equals(fullType)) {
            fullType = "*/*";
        }
        int subIndex = fullType.indexOf('/');
        if (subIndex == -1) {
            throw new InvalidMimeTypeException(mimeType, "does not contain '/'");
        }
        if (subIndex == fullType.length() - 1) {
            throw new InvalidMimeTypeException(mimeType, "does not contain subtype after '/'");
        }
        String type = fullType.substring(0, subIndex);
        String subtype = fullType.substring(subIndex + 1, fullType.length());
        if (MimeType.WILDCARD_TYPE.equals(type) && !MimeType.WILDCARD_TYPE.equals(subtype)) {
            throw new InvalidMimeTypeException(mimeType, "wildcard type is legal only in '*/*' (all mime types)");
        }

        Map<String, String> parameters = null;
        if (parts.length > 1) {
            parameters = new LinkedHashMap<String, String>(parts.length - 1);
            for (int i = 1; i < parts.length; i++) {
                String parameter = parts[i];
                int eqIndex = parameter.indexOf('=');
                if (eqIndex != -1) {
                    String attribute = parameter.substring(0, eqIndex);
                    String value = parameter.substring(eqIndex + 1, parameter.length());
                    parameters.put(attribute, value);
                }
            }
        }

        try {
            return new MimeType(type, subtype, parameters);
        } catch (UnsupportedCharsetException ex) {
            throw new InvalidMimeTypeException(mimeType, "unsupported charset '" + ex.getCharsetName() + "'");
        } catch (IllegalArgumentException ex) {
            throw new InvalidMimeTypeException(mimeType, ex.getMessage());
        }
    }
public static MimeType parseMimeType ( String mimeType ) { if ( ! StringUtils . hasLength ( mimeType ) ) { throw new InvalidMimeTypeException ( mimeType , "'mimeType' must not be empty" ) ; } String [ ] parts = StringUtils . tokenizeToStringArray ( mimeType , ";" ) ; String fullType = parts [ 0 ] . trim ( ) ; // java.net.HttpURLConnection returns a *; q=.2 Accept header if ( MimeType . WILDCARD_TYPE . equals ( fullType ) ) { fullType = "*/*" ; } int subIndex = fullType . indexOf ( ' ' ) ; if ( subIndex == - 1 ) { throw new InvalidMimeTypeException ( mimeType , "does not contain '/'" ) ; } if ( subIndex == fullType . length ( ) - 1 ) { throw new InvalidMimeTypeException ( mimeType , "does not contain subtype after '/'" ) ; } String type = fullType . substring ( 0 , subIndex ) ; String subtype = fullType . substring ( subIndex + 1 , fullType . length ( ) ) ; if ( MimeType . WILDCARD_TYPE . equals ( type ) && ! MimeType . WILDCARD_TYPE . equals ( subtype ) ) { throw new InvalidMimeTypeException ( mimeType , "wildcard type is legal only in '*/*' (all mime types)" ) ; } Map < String , String > parameters = null ; if ( parts . length > 1 ) { parameters = new LinkedHashMap < String , String > ( parts . length - 1 ) ; for ( int i = 1 ; i < parts . length ; i ++ ) { String parameter = parts [ i ] ; int eqIndex = parameter . indexOf ( ' ' ) ; if ( eqIndex != - 1 ) { String attribute = parameter . substring ( 0 , eqIndex ) ; String value = parameter . substring ( eqIndex + 1 , parameter . length ( ) ) ; parameters . put ( attribute , value ) ; } } } try { return new MimeType ( type , subtype , parameters ) ; } catch ( UnsupportedCharsetException ex ) { throw new InvalidMimeTypeException ( mimeType , "unsupported charset '" + ex . getCharsetName ( ) + "'" ) ; } catch ( IllegalArgumentException ex ) { throw new InvalidMimeTypeException ( mimeType , ex . getMessage ( ) ) ; } }
Parse the given String into a single {@code MimeType}.

@param mimeType the string to parse
@return the mime type
@throws InvalidMimeTypeException if the string cannot be parsed
Parse the given String into a single { @code MimeType } .