list转list(基于stream)

list<dto>转list<String>效果图

 

代码部分

 List<SourceObject> sourceList = createSourceList();
        List<String> collect = sourceList.stream().map(sourceObject -> sourceObject.getName()).collect(Collectors.toList());
        collect.forEach(a->{
            System.out.println(a);
        });

　　list<dto>转list<dto>效果图

 代码部分

List<TargetObject> targetObjects = sourceList.stream().map(sourceObject -> TargetObject.builder().id(sourceObject.getId()).name(sourceObject.getName()).build())
                .collect(Collectors.toList());
        targetObjects.forEach(a->{
            System.out.println(a);
        });

　　完整代码

package springboot;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.junit.Test;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @author yourheart
 * @Description
 * @create 2024-05-10 16:49
 */
public class ListToListTest {
    @Test
    public void test(){

        List<SourceObject> sourceList = createSourceList();
        List<String> collect = sourceList.stream().map(sourceObject -> sourceObject.getName()).collect(Collectors.toList());
        collect.forEach(a->{
            System.out.println(a);
        });


        List<TargetObject> targetObjects = sourceList.stream().map(sourceObject -> TargetObject.builder().id(sourceObject.getId()).name(sourceObject.getName()).build())
                .collect(Collectors.toList());
        targetObjects.forEach(a->{
            System.out.println(a);
        });

    }

    private  List<SourceObject> createSourceList() {
        // 创建一个简单的 SourceObject 列表
        List<SourceObject> list = new ArrayList<>();
        list.add(new SourceObject(1, "Apple"));
        list.add(new SourceObject(2, "Banana"));
        list.add(new SourceObject(3, "Orange"));
        return list;
    }
}

@Data
class SourceObject {
    private int id;
    private String name;

    public SourceObject(int id, String name) {
        this.id = id;
        this.name = name;
    }
    // 省略构造函数和 getter/setter 方法
}

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
class TargetObject {
    private int id;
    private String name;

    // 省略构造函数和 getter/setter 方法
}

　　使用的依赖

<!--引入junit单元测试依赖-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
        </dependency>
<!--lombok依赖-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.26</version>
        </dependency>