public <V> V convertFrom(final String text) {
        if (text == null) return null;
        return (V) convertFrom(Utility.charArray(text));
    }
public < V > V convertFrom ( final String text ) { if ( text == null ) return null ; return ( V ) convertFrom ( Utility . charArray ( text ) ) ; }
返回非null的值是由String、ArrayList、HashMap任意组合的对象