JAva--BEAN比較

package com.gildata.task.platform.common.util;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.gildata.task.platform.common.operationLog.TaskPoolConfigLog;

import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.sql.Timestamp;
import java.util.Arrays;
import java.util.Date;
import java.util.List;


public class CompareUtil {
    /**
     *          ，    boolean,true               
     *
     * @param oldObject          1
     * @param newObject          2
     * @return         boolean
     */
    public static boolean isDiff(Object oldObject, Object newObject) {
        JSONArray jsonArray = compareFields(oldObject, newObject, null);
        if (jsonArray.size() > 0) {
            return true;
        } else {
            return false;
        }
    }

    /**
     *          ，    map         key，value   Map   oldObject,newObject      
     *
     * @param obj1               1
     * @param obj2               2
     * @param ignoreArr        
     * @return         map
     */
    @SuppressWarnings("rawtypes")
    public static JSONArray compareFields(Object obj1, Object obj2, String[] ignoreArr) {
        JSONArray jsonArray = new JSONArray();
        try {
            List ignoreList = null;
            if (ignoreArr != null && ignoreArr.length > 0) {
                // array   list
                ignoreList = Arrays.asList(ignoreArr);
            }
            if (obj1.getClass() == obj2.getClass()) {//                   
                Class clazz = obj1.getClass();
                //   object     
                PropertyDescriptor[] pds = Introspector.getBeanInfo(clazz,
                        Object.class).getPropertyDescriptors();

                for (PropertyDescriptor pd : pds) {//           
                    String name = pd.getName();//    
                    if (ignoreList != null && ignoreList.contains(name)) {//             ，       
                        continue;
                    }
                    Method readMethod = pd.getReadMethod();// get  
                    //  obj1   get       obj1    
                    Object o1 = readMethod.invoke(obj1);
                    //  obj2   get       obj2    
                    Object o2 = readMethod.invoke(obj2);
                    if (o1 instanceof Timestamp) {
                        o1 = new Date(((Timestamp) o1).getTime());
                    }
                    if (o2 instanceof Timestamp) {
                        o2 = new Date(((Timestamp) o2).getTime());
                    }
                    if (o1 == null && o2 == null) {
                        continue;
                    } else if ((o1 == null && o2 != null)) {
                        JSONObject map = new JSONObject();
                        map.put("fieldName", name);
                        map.put("oldValue", "");
                        map.put("newValue", o2);
                        jsonArray.add(map);
                        continue;
                    } else if ((o2 == null && o1 != null)) {
                        JSONObject map = new JSONObject();
                        map.put("fieldName", name);
                        map.put("oldValue", o1);
                        map.put("newValue", "");
                        jsonArray.add(map);
                        continue;
                    }
                    if (!o1.equals(o2)) {
                        JSONObject jsonObject = new JSONObject();
                        jsonObject.put("fieldName", name);
                        jsonObject.put("oldValue", o1);
                        jsonObject.put("newValue", o2);
                        jsonArray.add(jsonObject);
                    }
                }
            }
            return jsonArray;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        TaskPoolConfigLog taskPoolConfigLog1 = new TaskPoolConfigLog();
        TaskPoolConfigLog taskPoolConfigLog2 = new TaskPoolConfigLog();
        taskPoolConfigLog1.setAppCode("1");
        taskPoolConfigLog2.setAppCode("2");
        taskPoolConfigLog1.setName("  ");
        taskPoolConfigLog2.setAppCode("  ");
        taskPoolConfigLog2.setUpdateTime(new Date());

        String[] ignoreArr = new String[3];
        compareFields(taskPoolConfigLog1, taskPoolConfigLog2, ignoreArr);
    }
}