给实体对象属性的空值赋默认值

private final String defaultStr = "";
private final Date defaultDate = new Date();
private final BigDecimal defaultDecimal = new BigDecimal(0);
private final Timestamp defaultTimestamp=new Timestamp(new Date().getTime());
//赋默认值
public void setDefaultValue(Object object) {
    	try {
    		Class clazz = object.getClass();
            Field[] fields = clazz.getDeclaredFields();
            String primaryKey = EntityUtil.getPrimaryKey(currentSession(), object.getClass());
            for(int i=0;i<fields.length;i++){
            	Field field = fields[i];
            	String fieldName = field.getName();
            	Class fieldClass=field.getType();
            	field.setAccessible(true); //设置访问权限
				if(!fieldName.equals(primaryKey) && isFieldValueNull(fieldName,object)){
					if (fieldClass == Integer.class ) {
						field.set(object, defaultDecimal.intValue());
					}else if (fieldClass == Long.class) {
						field.set(object, defaultDecimal.longValue());
					}else if (fieldClass == Float.class) {
						field.set(object, defaultDecimal.doubleValue());
					}else if (fieldClass == BigDecimal.class) {
						field.set(object, defaultDecimal);
					} else if (fieldClass == Date.class) {
						field.set(object, defaultDate);
					} else if (fieldClass == String.class){
						field.set(object, defaultStr); // 设置值
					} else if (fieldClass == Timestamp.class){
						field.set(object, defaultTimestamp);
					}
            	}else if(fieldName.equals(primaryKey) && isStringFieldValueNull(fieldName,object,fieldClass)){//MySQL，需要对对主键做特殊处理
            		field.set(object, null);
            	}
            }
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println(e.getMessage());
		}
    }

//判断字段是否为空
 private boolean isFieldValueNull(String fieldName, Object object) throws ClassNotFoundException {  
    	boolean isNUll=false;
        try {    
            String firstLetter = fieldName.substring(0, 1).toUpperCase();    
            String getter = "get" + firstLetter + fieldName.substring(1);    
            Method method = object.getClass().getMethod(getter, new Class[] {});    
            Object value = method.invoke(object, new Object[] {});    
            if(value==null){
            	isNUll=true;
            }
            return isNUll;    
        } catch (Exception e) {    
        	 return isNUll;    
        }    
    } 

  //判断主键是否为空值
   private boolean isStringFieldValueNull(String fieldName, Object object, Class fieldClass) throws ClassNotFoundException { 
    	boolean isNUll=false;
        try {    
            String firstLetter = fieldName.substring(0, 1).toUpperCase();    
            String getter = "get" + firstLetter + fieldName.substring(1);    
            Method method = object.getClass().getMethod(getter, new Class[] {});    
            Object value = method.invoke(object, new Object[] {}); 
            if(value==null ){
            	isNUll=true;
            }else{
            	if (fieldClass == String.class && StringUtils.isBlank((String)value)) {
            		isNUll=true;
            	}
            }
            return isNUll;    
        } catch (Exception e) {    
        	 return isNUll;    
        }    
    }