最近做以太坊钱包项目需要与前台进行json交互，写一个工具类，经普通javaBean转为json对象

1 package util; 2  3 import java.lang.reflect.Field; 4 import java.lang.reflect.Method; 5 import java.util.List; 6  7 import org.web3j.protocol.core.methods.response.Transaction; 8  9 import com.alibaba.fastjson.JSONArray;10 import com.alibaba.fastjson.JSONObject;11 12 public class JSONUtil {13     14     /**15      * 获取Transaction相应的JSON对象16      * @param trans17      * @return18      */19     public static JSONObject getTransJSON(Transaction trans) {20         JSONObject data = getJSON(Transaction.class, trans);21         return data;22     }23     24     /**25      * 获取交易信息列表26      * @param transList27      * @return28      */29     public static JSONArray getTransListJSON(List
     
       transList) {30         JSONArray data = new JSONArray();31         for(Transaction trans : transList) {32             JSONObject transJson = getTransJSON(trans);33             data.add(transJson);34         }35         return data;36     }37     38     /**39      * 获取json对象40      * @param cls41      * @param obj42      * @return43      */44     public static JSONObject getJSON(Class
       cls, Object obj) {45         JSONObject json = new JSONObject();46         Field[] fieldArray = cls.getDeclaredFields();47         for(Field field : fieldArray) {48             String fieldName = field.getName();49             String methodName = "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);50             try {51                 Method method = cls.getMethod(methodName);52                 Object fieldObject = method.invoke(obj, new Object[0]); 53                 String fieldValue = null; 54                 if(fieldObject != null) {55                     fieldValue = fieldObject.toString();56                 } 57                 json.put(fieldName, fieldValue);58             } catch (Exception e) {59                 e.printStackTrace();60             }61         }62         return json;63     }64     65 }