stringutils 判断对象以及对象内的map list是否为空

stringutils 判断对象以及对象内的map list是否为空

public class ArrayIsNotNull {

	public static void notEmpty(String message,Object obj) {
		if (obj == null){
			throw new IllegalArgumentException(message + " must be specified,obj is null");
		}
		if (obj instanceof String && obj.toString().trim().length()==0){
			throw new IllegalArgumentException(message + " must be specified,String is empty");
		}
		if (obj.getClass().isArray() && Array.getLength(obj)==0){
			throw new IllegalArgumentException(message + " must be specified,Array is empty");
		}
		if (obj instanceof Collection && ((Collection)obj).isEmpty()){
			throw new IllegalArgumentException(message + " must be specified, Collection is empty");
		}
		if (obj instanceof Map && ((Map)obj).isEmpty()){
			throw new IllegalArgumentException(message + " must be specified,Map is empty");
		}
	}
	
	public static boolean isNull(Object obj) {
		boolean result=false;
		if (obj == null){
			result=true;
			return result;
		}
		if (obj instanceof String && obj.toString().trim().length()==0){
			result=true;
			return result;
		}
		if (obj.getClass().isArray() && Array.getLength(obj)==0){
			result=true;
			return result;
		}
		if (obj instanceof Collection && ((Collection)obj).isEmpty()){
			result=true;
			return result;
		}
		if (obj instanceof Map && ((Map)obj).isEmpty()){
			result=true;
			return result;
		}
		return result;
    }
	
	public static void isNullAndThrowExp(String[] msg, Object... o) {
		StringBuffer buffer = new StringBuffer();
		if(msg.length+1 != o.length)
			throw new IllegalArgumentException(
					"strs's length is not equlas checkNames's length");
		
        for (int i = 1; i < o.length; i++) {
        	//student.getmap() 的值为null
            if (isNull(o[i])) {
            	buffer.append(msg[i-1]+",");
            }
        }
        if(buffer.toString().endsWith(",")){
        	buffer.deleteCharAt(buffer.length() - 1);
			buffer.append(" must be specified");
			throw new IllegalArgumentException(buffer.toString());
        }
    }
	
	public static void main(String[] args) throws Exception {		
		Student student=new Student();
		student.setAge(11);
		student.setNameString("");
		student.setPeople(true);
		ArrayList