Java uses reflection to convert Pojo to JSON objects

Recently done Ethereum Wallet project need to interact with the foreground JSON, write a tool class, by ordinary JavaBean to JSON object

1  Packageutil;2 3 ImportJava.lang.reflect.Field;4 ImportJava.lang.reflect.Method;5 Importjava.util.List;6 7 Importorg.web3j.protocol.core.methods.response.Transaction;8 9 ImportCom.alibaba.fastjson.JSONArray;Ten ImportCom.alibaba.fastjson.JSONObject; One  A  Public classJsonutil { -      -     /** the * Get transaction The corresponding JSON object -      * @paramTrans -      * @return -      */ +      Public Staticjsonobject Gettransjson (Transaction trans) { -Jsonobject data = Getjson (Transaction.class, trans); +         returndata; A     } at      -     /** - * Get a list of trading information -      * @paramtranslist -      * @return -      */ in      Public StaticJsonarray Gettranslistjson (list<transaction>translist) { -Jsonarray data =NewJsonarray (); to          for(Transaction trans:translist) { +Jsonobject Transjson =Gettransjson (trans); - Data.add (Transjson); the         } *         returndata; $     }Panax Notoginseng      -     /** the * Get JSON object +      * @paramCLS A      * @paramobj the      * @return +      */ -      Public StaticJsonobject Getjson (class<?>cls, Object obj) { $Jsonobject JSON =NewJsonobject (); $field[] Fieldarray =cls.getdeclaredfields (); -          for(Field field:fieldarray) { -String FieldName =field.getname (); theString methodName = "Get" + fieldname.substring (0, 1). toUpperCase () + fieldname.substring (1); -             Try {WuyiMethod method =Cls.getmethod (methodName); theObject fieldobject = Method.invoke (obj,NewObject[0]);  -String Fieldvalue =NULL;  Wu                 if(Fieldobject! =NULL) { -Fieldvalue =fieldobject.tostring (); About                 }  $ json.put (FieldName, fieldvalue); -}Catch(Exception e) { - e.printstacktrace (); -             } A         } +         returnJSON; the     } -      $}

Java uses reflection to convert Pojo to JSON objects