package com.mes.tools;
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import org.springframework.beans.BeanWrapper;
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import org.springframework.beans.BeanWrapperImpl;
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import java.beans.FeatureDescriptor;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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/**
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* EntityTool class
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*
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* @author yzx
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* @date 2025/8/4
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*/
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public class EntityTool {
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/**
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* 批量将源列表转换为目标实体列表(忽略null值)
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* @param sourceList 源对象列表
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* @param targetClass 目标实体类的Class对象
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* @param <S> 源对象类型
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* @param <T> 目标实体类型
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* @return 转换后的目标实体列表
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*/
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public static <S, T> List<T> batchConvert(List<S> sourceList, Class<T> targetClass) {
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if (sourceList == null || sourceList.isEmpty()) {
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// 空列表直接返回
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return new ArrayList<>();
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}
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// 逐个转换
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return sourceList.stream()
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.map(source -> convertSingle(source, targetClass))
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.collect(Collectors.toList());
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}
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/**
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* 单个对象转换(复用之前的非null复制逻辑)
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* @param source 源对象
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* @param targetClass 目标实体类的Class对象
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* @param <S> 源对象类型
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* @param <T> 目标对象类型
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* @return 转换后的目标实体
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*/
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public static <S, T> T convertSingle(S source, Class<T> targetClass) {
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try {
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T target = targetClass.getDeclaredConstructor().newInstance();
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copyNonNullProperties(source, target);
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return target;
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} catch (Exception e) {
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throw new RuntimeException("对象转换失败: " + e.getMessage(), e);
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}
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}
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/**
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* 复制源对象的非null属性到目标对象
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* @param source 源对象
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* @param target 目标实体类
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*/
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private static void copyNonNullProperties(Object source, Object target) {
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BeanWrapper sourceWrapper = new BeanWrapperImpl(source);
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BeanWrapper targetWrapper = new BeanWrapperImpl(target);
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Stream.of(sourceWrapper.getPropertyDescriptors())
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.map(FeatureDescriptor::getName)
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.filter(name -> !"class".equals(name))
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.forEach(name -> {
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try {
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Object value = sourceWrapper.getPropertyValue(name);
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if (value != null && targetWrapper.isWritableProperty(name)) {
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targetWrapper.setPropertyValue(name, value);
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}
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} catch (Exception e) {
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// 可添加日志:忽略属性复制异常
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}
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});
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}
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}
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