疯狂的狮子li
3 years ago
parent
f6c96bd246
commit
5e3f504c80
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<component name="ProjectRunConfigurationManager">
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<configuration default="false" name="RuoYiApplication" type="SpringBootApplicationConfigurationType" factoryName="Spring Boot">
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<module name="ruoyi-admin" />
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<option name="SPRING_BOOT_MAIN_CLASS" value="com.ruoyi.RuoYiApplication" />
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<option name="VM_PARAMETERS" value="--add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.lang.invoke=ALL-UNNAMED" />
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<method v="2">
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<option name="Make" enabled="true" />
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</method>
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</configuration>
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</component>
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package com.ruoyi.common.core.utils;
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import cn.hutool.core.collection.CollUtil;
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import cn.hutool.core.lang.SimpleCache;
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import cn.hutool.core.map.MapUtil;
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import cn.hutool.core.util.ObjectUtil;
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import cn.hutool.core.util.ReflectUtil;
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import cn.hutool.core.util.StrUtil;
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import lombok.AccessLevel;
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import lombok.NoArgsConstructor;
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import org.springframework.cglib.beans.BeanCopier;
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import org.springframework.cglib.beans.BeanMap;
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import org.springframework.cglib.core.Converter;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* bean深拷贝工具(基于 cglib 性能优异)
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* <p>
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* 重点 cglib 不支持 拷贝到链式对象
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* 例如: 源对象 拷贝到 目标(链式对象)
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* 请区分好`浅拷贝`和`深拷贝`再做使用
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*
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* @author Lion Li
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*/
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@NoArgsConstructor(access = AccessLevel.PRIVATE)
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public class BeanCopyUtils {
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/**
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* 单对象基于class创建拷贝
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*
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* @param source 数据来源实体
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* @param desc 描述对象 转换后的对象
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* @return desc
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*/
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public static <T, V> V copy(T source, Class<V> desc) {
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if (ObjectUtil.isNull(source)) {
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return null;
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}
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if (ObjectUtil.isNull(desc)) {
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return null;
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}
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final V target = ReflectUtil.newInstanceIfPossible(desc);
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return copy(source, target);
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}
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/**
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* 单对象基于对象创建拷贝
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*
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* @param source 数据来源实体
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* @param desc 转换后的对象
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* @return desc
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*/
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public static <T, V> V copy(T source, V desc) {
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if (ObjectUtil.isNull(source)) {
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return null;
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}
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if (ObjectUtil.isNull(desc)) {
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return null;
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}
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BeanCopier beanCopier = BeanCopierCache.INSTANCE.get(source.getClass(), desc.getClass(), null);
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beanCopier.copy(source, desc, null);
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return desc;
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}
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/**
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* 列表对象基于class创建拷贝
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*
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* @param sourceList 数据来源实体列表
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* @param desc 描述对象 转换后的对象
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* @return desc
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*/
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public static <T, V> List<V> copyList(List<T> sourceList, Class<V> desc) {
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if (ObjectUtil.isNull(sourceList)) {
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return null;
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}
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if (CollUtil.isEmpty(sourceList)) {
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return CollUtil.newArrayList();
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}
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return StreamUtils.toList(sourceList, source -> {
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V target = ReflectUtil.newInstanceIfPossible(desc);
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copy(source, target);
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return target;
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});
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}
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/**
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* bean拷贝到map
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*
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* @param bean 数据来源实体
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* @return map对象
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*/
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@SuppressWarnings("unchecked")
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public static <T> Map<String, Object> copyToMap(T bean) {
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if (ObjectUtil.isNull(bean)) {
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return null;
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}
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return BeanMap.create(bean);
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}
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/**
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* map拷贝到bean
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*
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* @param map 数据来源
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* @param beanClass bean类
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* @return bean对象
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*/
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public static <T> T mapToBean(Map<String, Object> map, Class<T> beanClass) {
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if (MapUtil.isEmpty(map)) {
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return null;
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}
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if (ObjectUtil.isNull(beanClass)) {
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return null;
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}
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T bean = ReflectUtil.newInstanceIfPossible(beanClass);
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return mapToBean(map, bean);
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}
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/**
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* map拷贝到bean
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*
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* @param map 数据来源
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* @param bean bean对象
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* @return bean对象
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*/
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public static <T> T mapToBean(Map<String, Object> map, T bean) {
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if (MapUtil.isEmpty(map)) {
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return null;
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}
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if (ObjectUtil.isNull(bean)) {
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return null;
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}
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BeanMap.create(bean).putAll(map);
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return bean;
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}
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/**
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* map拷贝到map
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*
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* @param map 数据来源
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* @param clazz 返回的对象类型
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* @return map对象
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*/
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public static <T, V> Map<String, V> mapToMap(Map<String, T> map, Class<V> clazz) {
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if (MapUtil.isEmpty(map)) {
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return null;
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}
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if (ObjectUtil.isNull(clazz)) {
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return null;
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}
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Map<String, V> copyMap = new LinkedHashMap<>(map.size());
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map.forEach((k, v) -> copyMap.put(k, copy(v, clazz)));
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return copyMap;
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}
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/**
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* BeanCopier属性缓存<br>
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* 缓存用于防止多次反射造成的性能问题
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*
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* @author Looly
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* @since 5.4.1
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*/
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public enum BeanCopierCache {
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/**
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* BeanCopier属性缓存单例
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*/
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INSTANCE;
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private final SimpleCache<String, BeanCopier> cache = new SimpleCache<>();
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/**
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* 获得类与转换器生成的key在{@link BeanCopier}的Map中对应的元素
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*
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* @param srcClass 源Bean的类
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* @param targetClass 目标Bean的类
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* @param converter 转换器
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* @return Map中对应的BeanCopier
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*/
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public BeanCopier get(Class<?> srcClass, Class<?> targetClass, Converter converter) {
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final String key = genKey(srcClass, targetClass, converter);
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return cache.get(key, () -> BeanCopier.create(srcClass, targetClass, converter != null));
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}
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/**
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* 获得类与转换器生成的key
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*
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* @param srcClass 源Bean的类
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* @param targetClass 目标Bean的类
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* @param converter 转换器
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* @return 属性名和Map映射的key
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*/
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private String genKey(Class<?> srcClass, Class<?> targetClass, Converter converter) {
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final StringBuilder key = StrUtil.builder()
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.append(srcClass.getName()).append('#').append(targetClass.getName());
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if (null != converter) {
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key.append('#').append(converter.getClass().getName());
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}
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return key.toString();
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}
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}
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}
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