Groovy-获取BeanInfo Props的名称类型和值

Posted 2021-02-23

Get obj props using java.beans.Introspector.getBeanInfo()

def getBeanInfoProps( aObj = null, aClass = null ) {
 
	if ( aClass == null ) { 
		aClass = aObj?.getClass(); 
	}
	assert( [aObj, aClass].count(null) != 2 );
 
	def map = [:];
 
	def lst = java.beans.Introspector.getBeanInfo( aClass ).propertyDescriptors.collect { it }
	lst.eachWithIndex { itr, idx -> 
		String theName = "${itr?.getReadMethod()?.name}".trim();
		if (theName.size() >= 3) {
			def startIdx          = theName.startsWith('is') ? 2 : 3 ; // is or get
			def propNameWrongCase = theName.substring( startIdx )
			def propName          = java.beans.Introspector.decapitalize(propNameWrongCase);
 
			def nestedMap   = [:]
			map[ propName ] = nestedMap;
 
			nestedMap.name  = propName;
			nestedMap.type  = itr.getPropertyType();
			nestedMap.value = (aObj == null) ? null : aObj[ propName ] ;
		}
	}
	// println map.values().join('
')
	return map;
}