JAVABEAN递归转MAP实现

public class ObjectToMap{
    
    public static Map objectToMap(Object obj){
        try{
            Class type = obj.getClass();
            Map returnMap = new HashMap();
            BeanInfo beanInfo = Introspector.getBeanInfo(type);

            PropertyDescriptor[] propertyDescriptors =  beanInfo.getPropertyDescriptors();
            for (int i = 0; i< propertyDescriptors.length; i++) {
                PropertyDescriptor descriptor = propertyDescriptors[i];
                String propertyName = descriptor.getName();
                if (!propertyName.equals("class")) {
                    Method readMethod = descriptor.getReadMethod();
                    Object result = readMethod.invoke(obj, new Object[0]);
                    if(result == null){
                        continue;
                    }
                    //判断是否为 基础类型 String,Boolean,Byte,Short,Integer,Long,Float,Double
                    //判断是否集合类，COLLECTION,MAP              
                    if(result instanceof String 
                            || result instanceof Boolean 
                            || result instanceof Byte 
                            || result instanceof Short 
                            || result instanceof Integer 
                            || result instanceof Long 
                            || result instanceof Float 
                            || result instanceof Double 
                            || result instanceof Enum 
                            ){
                        if (result != null) {
                            returnMap.put(propertyName, result);
                        }
                    }else if(result instanceof Collection){                        
                        Collection<?> lstObj = arrayToMap((Collection<?>)result);
                        returnMap.put(propertyName, lstObj);
                                
                    }else if(result instanceof Map){
                        Map<Object,Object> lstObj = mapToMap((Map<Object,Object>)result);
                        returnMap.put(propertyName, lstObj);
                    } else {
                        Map mapResult = objectToMap(result);
                        returnMap.put(propertyName, mapResult);
                    }
                    
                }
            }
            return returnMap;
        }catch(Exception e){
            throw new RuntimeException(e);
        }
        
    }    
    
    private static Map<Object, Object> mapToMap(Map<Object, Object> orignMap) {
        Map<Object,Object> resultMap = new HashMap<Object,Object>();
        for(Entry<Object, Object> entry:orignMap.entrySet()){
            Object key = entry.getKey();
            Object resultKey = null;
            if(key instanceof Collection){
                resultKey = arrayToMap((Collection)key);
            }else if(key instanceof Map){
                resultKey = mapToMap((Map)key);
            }
            else{
                if(key instanceof String 
                        || key instanceof Boolean 
                        || key instanceof Byte 
                        || key instanceof Short 
                        || key instanceof Integer 
                        || key instanceof Long 
                        || key instanceof Float 
                        || key instanceof Double 
                        || key instanceof Enum 
                        ){
                    if (key != null) {
                        resultKey = key;
                    }
                }else{
                    resultKey = objectToMap(key);
                }                
            }
            

            Object value = entry.getValue();
            Object resultValue = null;
            if(value instanceof Collection){
                resultValue = arrayToMap((Collection)value);
            }else if(value instanceof Map){
                resultValue = mapToMap((Map)value);
            }
            else{
                if(value instanceof String 
                        || value instanceof Boolean 
                        || value instanceof Byte 
                        || value instanceof Short 
                        || value instanceof Integer 
                        || value instanceof Long 
                        || value instanceof Float 
                        || value instanceof Double 
                        || value instanceof Enum 
                        ){
                    if (value != null) {
                        resultValue = value;
                    }
                }else{
                    resultValue = objectToMap(value);
                }                
            }
            
            resultMap.put(resultKey, resultValue);
        }        
        return resultMap;
    }


    private static Collection arrayToMap(Collection lstObj){
        ArrayList arrayList = new ArrayList();
        
        for (Object t : lstObj) {
            if(t instanceof Collection){
                Collection result = arrayToMap((Collection)t);
                arrayList.add(result);
            }else if(t instanceof Map){
                Map result = mapToMap((Map)t);
                arrayList.add(result);
            } else {
                if(t instanceof String 
                        || t instanceof Boolean 
                        || t instanceof Byte 
                        || t instanceof Short 
                        || t instanceof Integer 
                        || t instanceof Long 
                        || t instanceof Float 
                        || t instanceof Double 
                        || t instanceof Enum 
                        ){
                    if (t != null) {
                        arrayList.add(t);
                    }
                }else{
                    Object result = objectToMap(t);
                    arrayList.add(result);    
                }                
            }
        }
        return arrayList;
    }
    
}