比较两个实体属性值,返回一个map以有差异的属性名为key,value为一个Map分别存oldObject,newObject此属性名的值
1 /** 2 * 比较两个实体属性值,返回一个map以有差异的属性名为key,value为一个Map分别存oldObject,newObject此属性名的值 3 * 4 * @param oldObject 进行属性比较的对象1 5 * @param newObject 进行属性比较的对象2 6 * @return 属性差异比较结果map 7 */ 8 @SuppressWarnings("rawtypes") 9 public static Map<String, Map<String, BigDecimal>> compareFields(Object oldObject, Object newObject) { 10 Map<String, Map<String, BigDecimal>> map = null; 11 try { 12 /** 13 * 只有两个对象都是同一类型的才有可比性 14 */ 15 if (oldObject.getClass() == newObject.getClass()) { 16 map = new HashMap<String, Map<String, BigDecimal>>(); 17 Class clazz = oldObject.getClass(); 18 //获取object的所有属性 19 PropertyDescriptor[] pds = Introspector.getBeanInfo(clazz, Object.class).getPropertyDescriptors(); 20 for (PropertyDescriptor pd : pds) { 21 //遍历获取属性名 22 String name = pd.getName(); 23 //获取属性的get方法 24 Method readMethod = pd.getReadMethod(); 25 // 在oldObject上调用get方法等同于获得oldObject的属性值 26 Object oldValue = readMethod.invoke(oldObject); 27 // 在newObject上调用get方法等同于获得newObject的属性值 28 Object newValue = readMethod.invoke(newObject); 29 if (oldValue instanceof List) { 30 continue; 31 } 32 if (newValue instanceof List) { 33 continue; 34 } 35 if (oldValue instanceof Timestamp) { 36 oldValue = new Date(((Timestamp) oldValue).getTime()); 37 } 38 if (newValue instanceof Timestamp) { 39 newValue = new Date(((Timestamp) newValue).getTime()); 40 } 41 if (newValue == null) { 42 continue; 43 } 44 if (oldValue == null && newValue == null) { 45 continue; 46 } else if (oldValue == null && newValue != null) { 47 Map<String, BigDecimal> valueMap = new HashMap<>(); 48 if (oldValue == null) { 49 valueMap.put(StockPredictConstants.PROFIT_OLD_VALUE, null); 50 } else { 51 valueMap.put(StockPredictConstants.PROFIT_OLD_VALUE, new BigDecimal(oldValue.toString())); 52 } 53 if (newValue == null) { 54 valueMap.put(StockPredictConstants.PROFIT_NEW_VALUE, null); 55 } else { 56 valueMap.put(StockPredictConstants.PROFIT_NEW_VALUE, new BigDecimal(newValue.toString())); 57 } 58 map.put(name, valueMap); 59 continue; 60 } 61 BigDecimal oldBigDecimal = null; 62 BigDecimal newBigDecimal = null; 63 if (oldValue == null) { 64 oldBigDecimal = null; 65 } else { 66 oldBigDecimal = new BigDecimal(oldValue.toString()); 67 } 68 if (newValue == null) { 69 newBigDecimal = null; 70 } else { 71 newBigDecimal = new BigDecimal(newalue.toString()); 72 } 73 // 比较这两个值是否相等,不等就可以放入map了 74 if (oldBigDecimal.compareTo(newBigDecimal) != 0) { 75 Map<String, BigDecimal> valueMap = new HashMap<>(); 76 valueMap.put(StockPredictConstants.PROFIT_OLD_VALUE, oldBigDecimal); 77 valueMap.put(StockPredictConstants.PROFIT_NEW_VALUE, newBigDecimal); 78 map.put(name, valueMap); 79 } 80 } 81 } 82 } catch (Exception e) { 83 LOGGER.error("比较两个实体属性值比较两个实体属性值出错", e); 84 } 85 return map; 86 }