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!321 添加集合属性拷贝方法 BeanUtil.copyToList(Collection<?> collection, Class<T> targetType)

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Merge pull request !321 from jrd77/v5-dev
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Looly 2021-05-11 10:44:47 +08:00 committed by Gitee
commit 890307e123
2 changed files with 45 additions and 0 deletions
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17
hutool-core/src/main/java/cn/hutool/core/bean/BeanUtil.java
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@ -734,6 +734,23 @@ public class BeanUtil {
}).collect(Collectors.toList()); }).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> * 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> * 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>

28
hutool-core/src/test/java/cn/hutool/core/bean/BeanUtilTest.java
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@ -4,8 +4,10 @@ import cn.hutool.core.annotation.Alias;
import cn.hutool.core.bean.copier.CopyOptions; import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.bean.copier.ValueProvider; import cn.hutool.core.bean.copier.ValueProvider;
import cn.hutool.core.collection.CollUtil; import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.collection.ListUtil;
import cn.hutool.core.map.MapUtil; import cn.hutool.core.map.MapUtil;
import cn.hutool.core.util.ArrayUtil; import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.ReflectUtil;
import cn.hutool.core.util.StrUtil; import cn.hutool.core.util.StrUtil;
import lombok.Data; import lombok.Data;
import lombok.Getter; import lombok.Getter;
@ -501,6 +503,12 @@ public class BeanUtilTest {
Assert.assertEquals("{codeList={0={name=张三}}}", resultMap.toString()); Assert.assertEquals("{codeList={0={name=张三}}}", resultMap.toString());
} }
@Data
public static class Student{
String name;
int age;
Long no;
}
@Test @Test
public void beanCopyTest() { public void beanCopyTest() {
final Station station = new Station(); final Station station = new Station();
@ -512,6 +520,26 @@ public class BeanUtilTest {
Assert.assertEquals(new Long(123456L), station2.getId()); 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> { public static class Station extends Tree<Station, Long> {
} }