From 2063cb2453f8976e4c9615c5816491248d782886 Mon Sep 17 00:00:00 2001
From: wangzhen <wangzhen@antbastion.com>
Date: Mon, 10 May 2021 14:27:14 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E5=A4=8D=E5=88=B6=E9=9B=86?=
 =?UTF-8?q?=E5=90=88=E4=B8=AD=E7=9A=84Bean=E5=B1=9E=E6=80=A7=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95,=E5=AF=B9=E6=AF=94=E5=8E=9F=E6=96=B9=E6=B3=95(copyToL?=
 =?UTF-8?q?ist)=E5=87=8F=E5=B0=91=E4=B8=8D=E5=B8=B8=E7=94=A8=E5=8F=82?=
 =?UTF-8?q?=E6=95=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/cn/hutool/core/bean/BeanUtil.java    | 17 +++++++++++
 .../cn/hutool/core/bean/BeanUtilTest.java     | 28 +++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/hutool-core/src/main/java/cn/hutool/core/bean/BeanUtil.java b/hutool-core/src/main/java/cn/hutool/core/bean/BeanUtil.java
index db5d4e67b..f1fc29689 100644
--- a/hutool-core/src/main/java/cn/hutool/core/bean/BeanUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/bean/BeanUtil.java
@@ -734,6 +734,23 @@ public class BeanUtil {
 		}).collect(Collectors.toList());
 	}
 
+	/**
+	 * 复制集合中的Bean属性<br>
+	 * 此方法遍历集合中每个Bean，复制其属性后加入一个新的{@link List}中。
+	 *
+	 * @param collection 原Bean集合
+	 * @param targetType 目标Bean类型
+	 * @param <T> Bean类型
+	 * @return 复制后的List
+	 */
+	public static <T> List<T> copyToList(Collection<?> collection, Class<T> targetType){
+		return collection.stream().map((source)->{
+			final T target = ReflectUtil.newInstanceIfPossible(targetType);
+			copyProperties(source, target);
+			return target;
+		}).collect(Collectors.toList());
+	}
+
 	/**
 	 * 给定的Bean的类名是否匹配指定类名字符串<br>
 	 * 如果isSimple为{@code false}，则只匹配类名而忽略包名，例如：cn.hutool.TestEntity只匹配TestEntity<br>
diff --git a/hutool-core/src/test/java/cn/hutool/core/bean/BeanUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/bean/BeanUtilTest.java
index 2c3621871..0a7a10507 100644
--- a/hutool-core/src/test/java/cn/hutool/core/bean/BeanUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/bean/BeanUtilTest.java
@@ -4,8 +4,10 @@ import cn.hutool.core.annotation.Alias;
 import cn.hutool.core.bean.copier.CopyOptions;
 import cn.hutool.core.bean.copier.ValueProvider;
 import cn.hutool.core.collection.CollUtil;
+import cn.hutool.core.collection.ListUtil;
 import cn.hutool.core.map.MapUtil;
 import cn.hutool.core.util.ArrayUtil;
+import cn.hutool.core.util.ReflectUtil;
 import cn.hutool.core.util.StrUtil;
 import lombok.Data;
 import lombok.Getter;
@@ -501,6 +503,12 @@ public class BeanUtilTest {
 		Assert.assertEquals("{codeList={0={name=张三}}}", resultMap.toString());
 	}
 
+	@Data
+	public static class Student{
+		String name;
+		int age;
+		Long no;
+	}
 	@Test
 	public void beanCopyTest() {
 		final Station station = new Station();
@@ -512,6 +520,26 @@ public class BeanUtilTest {
 		Assert.assertEquals(new Long(123456L), station2.getId());
 	}
 
+	@Test
+	public void copyListTest(){
+
+		Student student = ReflectUtil.newInstance(Student.class);
+		student.setName("张三");
+		student.setAge(123);
+		student.setNo(3158L);
+		Student student2 = ReflectUtil.newInstance(Student.class);
+		student.setName("李四");
+		student.setAge(125);
+		student.setNo(8848L);
+		List<Student> studentList = ListUtil.of(student, student2);
+		List<Person> people = BeanUtil.copyToList(studentList, Person.class);
+		Assert.assertEquals(studentList.size(),people.size());
+		for (int i = 0; i < studentList.size(); i++) {
+			Assert.assertEquals(studentList.get(i).getName(),people.get(i).getName());
+			Assert.assertEquals(studentList.get(i).getAge(),people.get(i).getAge());
+		}
+
+	}
 	public static class Station extends Tree<Station, Long> {
 
 	}