116 lines
3.5 KiB
Java
116 lines
3.5 KiB
Java
package com.pictc.utils;
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import org.apache.commons.collections4.CollectionUtils;
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import java.lang.reflect.Field;
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import java.util.*;
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/**
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* 对象差异比较工具类
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* 支持嵌套对象和List集合的比较
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*/
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public class ObjectDiffUtils {
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/**
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* 比较两个对象并返回差异信息
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* @param obj1 第一个对象
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* @param obj2 第二个对象
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* @param <T> 对象类型
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* @return 差异结果列表
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*/
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public static <T> List<String> compare(T obj1, T obj2) {
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List<String> diffs = new ArrayList<>();
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if (obj1 == null || obj2 == null) {
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return diffs;
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}
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try {
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compareFields(obj1, obj2, diffs);
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} catch (Exception e) {
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throw new RuntimeException("Failed to compare objects", e);
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}
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return diffs;
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}
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/**
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* 递归比较对象字段
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*/
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private static void compareFields(Object obj1, Object obj2, List<String> diffs)
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throws IllegalAccessException {
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Class<?> clazz = obj1.getClass();
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// 获取所有字段（包括私有字段）
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Field[] fields = getAllFields(clazz);
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for (Field field : fields) {
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field.setAccessible(true);
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Object value1 = field.get(obj1);
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Object value2 = field.get(obj2);
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String fieldName = field.getName();
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// 检查字段类型
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Class<?> fieldType = field.getType();
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// 如果是List类型
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if (List.class.isAssignableFrom(fieldType)) {
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compareLists(value1, value2, fieldName, diffs);
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}
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// 如果是Map类型（可选扩展）
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else if (Map.class.isAssignableFrom(fieldType)) {
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compareMaps(value1, value2, fieldName, diffs);
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}
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// 基本类型、String、包装类型等
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else {
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compareBasicValues(value1, value2, fieldName, diffs);
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}
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}
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}
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/**
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* 比较两个List
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*/
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private static void compareLists(Object list1, Object list2, String fieldName, List<String> diffs) {
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List<?> l1 = (List<?>) list1;
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List<?> l2 = (List<?>) list2;
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if (l1 == null || l2 == null) {
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return;
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}
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// 比较List大小
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if (l1.size() != l2.size()) {
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diffs.add(fieldName);
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return;
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}
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// 比较List中的每个元素
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for (int i = 0; i < l1.size(); i++) {
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List<String> result = compare(l1.get(i), l2.get(i));
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if (CollectionUtils.isNotEmpty(result)) {
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for (String s : result) {
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diffs.add(fieldName + "["+ i +"]." + s);
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}
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}
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}
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}
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/**
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* 比较两个Map（可选功能）
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*/
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private static void compareMaps(Object map1, Object map2, String path, List<String> diffs) {
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// Map比较的实现，可根据需要扩展
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}
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/**
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* 比较基本值
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*/
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private static void compareBasicValues(Object value1, Object value2, String fieldName, List<String> diffs) {
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if (!Objects.equals(value1, value2)) {
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diffs.add(fieldName);
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}
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}
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/**
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* 获取类及其父类的所有字段
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*/
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private static Field[] getAllFields(Class<?> clazz) {
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List<Field> fields = new ArrayList<>();
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while (clazz != null && clazz != Object.class) {
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fields.addAll(Arrays.asList(clazz.getDeclaredFields()));
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clazz = clazz.getSuperclass();
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}
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return fields.toArray(new Field[0]);
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}
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} |