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 trans 17 * @return
18 */
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 transList 27 * @return
28 */
29 public static JSONArray getTransListJSON(List<Transaction> 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 cls 41 * @param obj 42 * @return
43 */
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 }