Java代码实现行列转换

本代码想要达到的效果

 测试完整代码如下（copy直接运行）：

public class TestConvert {

    public static void main(String[] args) {

        ArrayList<Attribute> sourceList = new ArrayList<>();

        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                sourceList.add(new Attribute("name"+i, "value"+j, "code"+i, "data"+j));
            }
            
        }
        ArrayList<HashMap<String, String>> maps = new ArrayList<>();

        HashMap<String, Map<String,String>> temp = new HashMap<>();
        sourceList.forEach(item->{
            String name = item.getName();
            String code = item.getCode();
            String value = item.getValue();
            String data = item.getData();
            if(!temp.containsKey(name)){
                HashMap<String, String> nodeMap = new HashMap<>();
                nodeMap.put("cellName",name);
                nodeMap.put("cellCode",code);
                nodeMap.put(data,value);
                temp.put(name,nodeMap);
                maps.add(nodeMap);
            }else {
                HashMap<String, String> map = (HashMap<String, String>) temp.get(name);
                map.put(data,value);
            }
        });
        System.out.println(maps);
    }


}

@Data
@AllArgsConstructor
@NoArgsConstructor
class Attribute{
    private String name;
    private String value;
    private String code;
    private String data;
}