使用反射,可以对实体类中的所有String类型的成员变量的值执行trim操作

(1)trim

/**** 对object中的所有成员变量的值,执行trim操作<br>* 即去掉首尾的空格* @param obj* @throws SecurityException* @throws NoSuchFieldException* @throws IllegalArgumentException* @throws IllegalAccessException*/public static void trimObject(Object obj) throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException{if(obj==null){return;}List<Field> fieldsList =getAllFieldList(obj.getClass());for(int i=0;i<fieldsList.size();i++){Field f=fieldsList.get(i);Object vObj=getObjectValue(obj,f );if(f.getType().getName().equals("java.lang.String") && (vObj instanceof String) ){String str=(String)vObj;if(str!=null){str=str.trim();f.setAccessible(true);f.set(obj, str);}}}}  

应用场景

// 是否清除成员变量的值前后的空格boolean isTrim2=false;String isTrim22Str=DictionaryParam.get(Constant2.DICTIONARY_GROUP_GLOBAL_SETTING,"is_trim_columnValue");if(!ValueWidget.isNullOrEmpty(isTrim22Str)){isTrim2=Boolean.parseBoolean(isTrim22Str);}if(isTrim2&&user!=null){try {ReflectHWUtils.trimObject(user);} catch (SecurityException e) {e.printStackTrace();} catch (NoSuchFieldException e) {e.printStackTrace();} catch (IllegalArgumentException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();}}

(2)把值为空字符串的成员变量设置为null

/**** 把对象中空字符串改为null* @param obj : 要修改的对象:java bean* @param isTrim : 是否清除成员变量的值前后的空格* @throws SecurityException* @throws NoSuchFieldException* @throws IllegalArgumentException* @throws IllegalAccessException*/public static void convertEmpty2Null(Object obj,boolean isTrim) throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException{if(obj==null){return;}List<Field> fieldsList =getAllFieldList(obj.getClass());for(int i=0;i<fieldsList.size();i++){Field f=fieldsList.get(i);Object vObj=getObjectValue(obj,f );if(f.getType().getName().equals("java.lang.String") && (vObj instanceof String) ){String str=(String)vObj;if(isTrim){//清除首尾的空格if(str!=null){str=str.trim();}}if(SystemHWUtil.EMPTY.equals(str)){
//                  System.out.println(f.getName());
//                  System.out.println(f.getType().getName());f.setAccessible(true);f.set(obj, null);}else{if(isTrim){//清除首尾的空格f.setAccessible(true);f.set(obj, str);}}}}}/**** 不trim* @param obj* @throws SecurityException* @throws NoSuchFieldException* @throws IllegalArgumentException* @throws IllegalAccessException*/public static void convertEmpty2Null(Object obj) throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException{if(obj==null){return;}convertEmpty2Null(obj, false/* isTrim */);}

应用场景:

// 是否清除成员变量的值前后的空格boolean isTrim2=false;String isTrim22Str=DictionaryParam.get(Constant2.DICTIONARY_GROUP_GLOBAL_SETTING,"is_trim_columnValue");if(!ValueWidget.isNullOrEmpty(isTrim22Str)){isTrim2=Boolean.parseBoolean(isTrim22Str);}try {//把对象中空字符串改为nullReflectHWUtils.convertEmpty2Null(ordersDetail,isTrim2);if(!ValueWidget.isNullOrEmpty(ordersDetail.getToothOrders())){ReflectHWUtils.convertEmpty2Null(ordersDetail.getToothOrders(),isTrim2);//不需要再set一遍}if(!ValueWidget.isNullOrEmpty(ordersDetail.getProducts())){ReflectHWUtils.convertEmpty2Null(ordersDetail.getProducts(),isTrim2);//不需要再set一遍}} catch (SecurityException e) {e.printStackTrace();} catch (NoSuchFieldException e) {e.printStackTrace();} catch (IllegalArgumentException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();}