Member variable value trim for all string types of an entity class

Using reflection, you can perform a trim operation on the value of a member variable of all string types in an entity class

(1) Trim

/*** *  the value of all member variables in object, perform trim operations <br> *  That is, remove the spaces  *  @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,&NBSP;STR);}}} 

Application Scenarios

Whether to clear the space before and after the value of the member variable Boolean istrim2=false; String Istrim22str=dictionaryparam.get (constant2.dictionary_group_global_setting, "Is_trim_columnvalue"); 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) Set the member variable with a value of empty string to null

/*** *  to change an object's hollow string to null *  @param  obj :  object to modify: java bean * @ param istrim :  whether to clear the space before and after the value of the member variable  *  @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) {//clears the leading and trailing spaces 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) {//clear the trailing space f.setaccessible (true); F.set (OBJ,&NBSP;STR);}}}} /*** *  not 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 */);}

scenario :

Whether to clear the space before and after the value of the member variable Boolean istrim2=false; String Istrim22str=dictionaryparam.get (constant2.dictionary_group_global_setting, "Is_trim_columnvalue"); Valuewidget.isnullorempty (ISTRIM22STR)) {Istrim2=boolean.parseboolean (ISTRIM22STR);} try {//To change the object's hollow string to Nullreflecthwutils.convertempty2null (ORDERSDETAIL,ISTRIM2); Valuewidget.isnullorempty (Ordersdetail.gettoothorders ())) {Reflecthwutils.convertempty2null ( Ordersdetail.gettoothorders (), isTrim2);//Do not need to set again}if (!) Valuewidget.isnullorempty (Ordersdetail.getproducts ())) {Reflecthwutils.convertempty2null ( Ordersdetail.getproducts (), isTrim2);//Do not need to set again}} catch (SecurityException e) {e.printstacktrace ();} catch ( Nosuchfieldexception e) {e.printstacktrace (),} catch (IllegalArgumentException e) {e.printstacktrace ();} catch ( Illegalaccessexception e) {e.printstacktrace ();}

This article is from the "Whuang" blog, make sure to keep this source http://huangkunlun520.blog.51cto.com/2562772/1599348

Member variable value trim for all string types of an entity class