java后端如何实现封装桑葚图所需参数

java后端如何实现封装桑葚图所需参数，格式如：

import lombok.Data;

import java.io.Serializable;
import java.util.List;

@Data
public class Sankey implements Serializable {
    private static final long serialVersionUID = 7283809474105648403L;

    List<SankeyNode> data;
    List<SankeyLink> links;
}

@Data
public class SankeyLink implements Serializable {
    private static final long serialVersionUID = 7217939852544709428L;

    private String source;

    private String target;

    private Integer value;
}

@Data
public class SankeyNode implements Serializable {
    private static final long serialVersionUID = -6024281795079603621L;

    private String name;
}