Java Spark Bean编码器正在为嵌套类映射错误的值

我所要做的就是将一个Shapes类型的数据集转换为另一个相同类型的数据集。但是我看到错误的值被映射到bean

我的输入文件shapes.json在这里

{“形状”：[{“长度”：0，“面积”：73488.0，“isRound”：true}]}

但在编码后映射时，我在map函数中看到了这些值，正如您所看到的，它们与我的输入文件不同

形状[Shapes=[Shape[length=1，area=73488.0，isRound=false]]

我试了很多次来调试这个问题，也用了很多次谷歌搜索，但无法理解这个错误映射的原因

这是我非常简单的主要功能

public static void main(String[] args) {
    //Step 1 Read from input
    Dataset<Row> df = session.read().format("json").option("header",  true).load("shapes.json");

    //Step 2 Use bean encoder 
    Dataset<Shapes> shapeDf = df.as(Encoders.bean(Shapes.class));
    shapeDf.show(); // This shows correct values

    //Step 3 Use map fucntion
    Dataset<Shapes> anotherShapeDf = shapeDf.map((MapFunction<Shapes, Shapes>) row -> {
        System.out.println(row); // Wrongly mapped values being printed
        return row;
    }, Encoders.bean(Shapes.class));

    // Wrong values are mapped
    anotherShapeDf.show(); 
}

形状类

public class Shape implements Serializable {

    private static final long serialVersionUID = 7293213441670072327L;

    private long length;
    private double area;
    private boolean round;

    public Long getLength() {return length;}
    public void setLength(Long length) {this.length = length;}

    public Double getArea() {return area;}
    public void setArea(Double area) {this.area = area;}

    public boolean isRound() {return round;}
    public void setRound(boolean round) {this.round = round;}

    @Override
    public String toString() {
        return "Shape [length=" + length + ", area=" + area + ", round=" + round + "]";
    }
    }

---

我不会详细介绍如何计算它，但是您得到错误结果的原因是模式不匹配

将

isRound

getter/setter方法更改为以下签名：

public boolean getIsRound() {
    return isRound;
}

public void setIsRound(boolean isRound) {
    this.isRound = isRound;
}

一切都像一个符咒

Shapes [shapes=[Shape [length=0, area=73488.0, isRound=true]]]
+--------------------+
|              shapes|
+--------------------+
|[[73488.0, true, 0]]|
+--------------------+

---

谢谢@Gelerion。我使用了eclipse的getter和setter。

Shapes [shapes=[Shape [length=0, area=73488.0, isRound=true]]]
+--------------------+
|              shapes|
+--------------------+
|[[73488.0, true, 0]]|
+--------------------+