Java浅拷贝工具类

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import net.sf.cglib.beans.BeanCopier;
import org.apache.commons.collections4.CollectionUtils;
import org.springframework.beans.BeanUtils;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.function.Function;

/**
* 对象拷贝
*
* @date 2021/7/05 09:15
*/
public class CloneUtils {

/**
* 拷贝对象
*
* @param source 拷贝源
* @param classTargetType 对象类型
* @return 返回对象
*/
public static <T, E> E clone(T source, Class<E> classTargetType) {

if (source == null) {
return null;
}
E targetInstance;
try {
targetInstance = classTargetType.newInstance();
} catch (InstantiationException | IllegalAccessException e) {
throw new RuntimeException(e);
}
BeanUtils.copyProperties(source, targetInstance);
return targetInstance;
}

/**
* 拷贝数组对象
* @param sourceList 拷贝源
* @param classType 对象类型
* @return 返回对象
*/
public static <T, E> List<E> batchClone(List<T> sourceList, Class<E> classType) {
if (sourceList == null) {
return null;
}
List<E> result = new ArrayList<>();
for (T t : sourceList) {
result.add(clone(t, classType));
}
return result;
}

/**
* 浅拷贝对象
*
* @param sourceObj 被拷贝对象
* @param targetClass 拷贝类型
*/
public static <T> T convertToTarget(Object sourceObj, Class<T> targetClass) {
T targetObj;
try {
targetObj = targetClass.newInstance();
} catch (InstantiationException | IllegalAccessException e) {
throw new RuntimeException(e);
}

BeanUtils.copyProperties(sourceObj, targetObj);
return targetObj;
}

/**
* 浅拷贝数组对象
*
* @param sourceList 被拷贝数组
* @param targetClass 拷贝类型
*/
public static <T> List<T> convertToTargetList(List<?> sourceList, Class<T> targetClass) {
if (CollectionUtils.isEmpty(sourceList)) {
return Collections.emptyList();
}
if (targetClass == null) {
return null;
}
List<T> targetList = new ArrayList<>();
for (Object sourceObj : sourceList) {
T targetObj = convertToTarget(sourceObj, targetClass);
targetList.add(targetObj);
}
return targetList;
}

/**
* 浅拷贝对象(性能++)
*
* @param source 被拷贝数组
* @param dest 拷贝类型
*/
public static <S, T> T convert(S source, Class<T> dest, Function<T, T> function) {
if (source == null) {
return null;
}
try {
T result = dest.newInstance();
final BeanCopier copier = BeanCopier.create(source.getClass(), dest, false);
copier.copy(source, result, null);
if (function != null) {
function.apply(result);
}
return result;
} catch (Exception e) {
System.out.println(e.getMessage());
}
return null;
}

/**
* 浅拷贝对象(性能++)
*
* @param copier 代理对象
* @param dest 目标类型
* @param function 功能校验
*/
public static <S, T> T convert(BeanCopier copier, S source, Class<T> dest, Function<T, T> function) {
if (source == null) {
return null;
}
try {
T result = dest.newInstance();
copier.copy(source, result, null);
if (function != null) {
function.apply(result);
}
return result;
} catch (Exception e) {
System.out.println(e.getMessage());
}
return null;
}

/**
* 浅拷贝数组(性能++)
* @param sourceList 被拷贝数组
* @param dest 目标类型
* @param function 功能校验
* @return 目标类型数组
*/
public static <S, T> List<T> convertList(List<S> sourceList, Class<T> dest, Function<T, T> function) {
if (CollectionUtils.isEmpty(sourceList)) {
return Collections.emptyList();
}
try {
List<T> resultList = new ArrayList<>();
final BeanCopier copier = BeanCopier.create(sourceList.get(0).getClass(), dest, false);
for (S source : sourceList) {
T result = dest.newInstance();
copier.copy(source, result, null);
resultList.add(result);
}
if (function != null) {
resultList.forEach(function::apply);
}
return resultList;
} catch (Exception e) {
System.out.println(e.getMessage());
}
return null;
}

/**
* 创建代理对象
* @param source 源类型
* @param dest 目标类型
* @return 代理对象
*/
public static <S, T> BeanCopier createCopier(Class<S> source, Class<T> dest) {
return BeanCopier.create(source, dest, false);
}
}