工具类:
java
package com.ssdl.baize.pub;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Supplier;
import org.springframework.beans.BeanUtils;
public class BeanConvertUtils extends BeanUtils {
public static <S, T> T convertTo(S source, Supplier<T> targetSupplier) {
return convertTo(source, targetSupplier, null);
}
/**
* 转换对象
* @param source 源对象
* @param targetSupplier 目标对象供应方
* @param callBack 回调方法
* @param <S> 源对象类型
* @param <T> 目标对象类型
* @return 目标对象
*/
public static <S, T> T convertTo(S source, Supplier<T> targetSupplier, ConvertCallBack<S, T> callBack) {
if (null == source || null == targetSupplier) {
return null;
}
T target = targetSupplier.get();
copyProperties(source, target);
if (callBack != null) {
callBack.callBack(source, target);
}
return target;
}
public static <S, T> List<T> convertListTo(List<S> sources, Supplier<T> targetSupplier) {
return convertListTo(sources, targetSupplier, null);
}
/**
* 转换对象
* @param sources 源对象list
* @param targetSupplier 目标对象供应方
* @param callBack 回调方法
* @param <S> 源对象类型
* @param <T> 目标对象类型
* @return 目标对象list
*/
public static <S, T> List<T> convertListTo(List<S> sources, Supplier<T> targetSupplier, ConvertCallBack<S, T> callBack) {
if (null == sources || null == targetSupplier) {
return null;
}
List<T> list = new ArrayList<>(sources.size());
for (S source : sources) {
T target = targetSupplier.get();
copyProperties(source, target);
if (callBack != null) {
callBack.callBack(source, target);
}
list.add(target);
}
return list;
}
/**
* 回调接口
*
* @param <S> 源对象类型
* @param <T> 目标对象类型
*/
@FunctionalInterface
public interface ConvertCallBack<S, T> {
void callBack(S t, T s);
}
/**
* 将源列表中的数据复制到目标列表中,并返回目标列表。
*
* @param sourceList 源列表
* @param targetClass 目标列表中元素的类
* @return 目标列表
*/
public static <S, T> List<T> copyList(List<S> sourceList, Class<T> targetClass) {
List<T> targetList = new ArrayList<>();
for (S source : sourceList) {
T target;
try {
target = targetClass.getDeclaredConstructor().newInstance();
BeanUtils.copyProperties(target, source);
targetList.add(target);
} catch (InstantiationException | IllegalAccessException | InvocationTargetException
| NoSuchMethodException e) {
// 处理异常
e.printStackTrace();
}
}
return targetList;
}
}
方法测试:
java
package com.ssdl.baize.pub;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Supplier;
public class Test01 {
public static void main(String[] args) {
}
@Test
public void test01(){
// 创建源对象列表
List<SourceEntity> sourceList = new ArrayList<>();
sourceList.add(new SourceEntity(1L, "张三"));
sourceList.add(new SourceEntity(2L, "李四"));
sourceList.add(new SourceEntity(3L, "王五"));
// 定义目标对象的供应方(Supplier)
Supplier<TargetDTO> targetSupplier = TargetDTO::new;
// 转换对象列表
List<TargetDTO> targetList = BeanConvertUtils.convertListTo(sourceList, targetSupplier, (source, target) -> {
// 可以在回调函数中进行额外的处理 比如特定字段的赋值等
target.setId(source.getId());
});
// 输出转换后的目标对象列表
for (TargetDTO dto : targetList) {
System.out.println("ID: " + dto.getId() + ", Name: " + dto.getName());
}
}
@Test
public void test02(){
// 单个对象
SourceEntity zhangSan = new SourceEntity(1L, "张三");
TargetDTO targetDTO = BeanConvertUtils.convertTo(zhangSan, TargetDTO::new);
System.out.println("单个对象:"+targetDTO);
// 单个对象某字段特殊处理
TargetDTO targetDTO1 = BeanConvertUtils.convertTo(zhangSan, TargetDTO::new, (a, b) -> {
Long id = a.getId();
if (1L==id){
b.setId(2L);
}
});
System.out.println("单个对象某字段特殊处理:"+targetDTO1);
}
@Data
@AllArgsConstructor
@NoArgsConstructor
static class SourceEntity {
private Long id;
private String name;
}
@Data
@AllArgsConstructor
@NoArgsConstructor
static class TargetDTO {
private Long id;
private String name;
}
}
结果: