1.差异模型
@Data public class Comparison implements Serializable { //字段 private String Field; //字段旧值 private Object before; //字段新值 private Object after; }
2.对比类
import com.oigit.api.model.bo.Comparison; import java.lang.reflect.Field; import java.util.ArrayList; import java.util.List; public class CompareObjUtil { public static List<Comparison> compareObj(Object beforeObj, Object afterObj) throws Exception{ List<Comparison> diffs = new ArrayList<>(); if(beforeObj == null) { throw new RuntimeException("原对象不能为空"); } if(afterObj == null) { throw new RuntimeException("新对象不能为空"); } if(!beforeObj.getClass().isAssignableFrom(afterObj.getClass())){ throw new RuntimeException("两个对象不相同,无法比较"); } //取出属性 Field[] beforeFields = beforeObj.getClass().getDeclaredFields(); Field[] afterFields = afterObj.getClass().getDeclaredFields(); Field.setAccessible(beforeFields, true); Field.setAccessible(afterFields, true); //遍历取出差异值 if(beforeFields != null && beforeFields.length > 0){ for(int i=0; i<beforeFields.length; i++){ Object beforeValue = beforeFields[i].get(beforeObj); Object afterValue = afterFields[i].get(afterObj); if((beforeValue != null && !"".equals(beforeValue) && !beforeValue.equals(afterValue)) || ((beforeValue == null || "".equals(beforeValue)) && afterValue != null)){ Comparison comparison = new Comparison(); comparison.setField(beforeFields[i].getName()); comparison.setBefore(beforeValue); comparison.setAfter(afterValue); diffs.add(comparison); } } } return diffs; } }