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我正在尝试将大量 xml 转换为单个 csv 文件。xml 的简化结构如下所示：

<Receipts>
    <Receipt>
        <Field1 attribute1="a"/>
        <Fields2>
            <Field2 attribute2="1"/>
            <Field2 attribute2="2"/>
        </Fields2>
        <Field4 attribute4="4a"/>
    </Receipt>
    <Receipt>
        <Field1 attribute1="b"/>
        <Field4 attribute4="4b"/>
    </Receipt>
    <Receipt>
        <Field1 attribute1="c"/>
        <Fields2>
            <Field2 attribute2="3"/>
        </Fields2>
        <Field3 attribute3="c3"/>
        <Field4 attribute4="4c"/>
    </Receipt>
</Receipts>

我想获得的 csv 结果是

Attribute1,Attribute2,Attribute3,Attribute4
a,1,,4a
a,2,,4a
b,,,4b
c,3,c3,4c

我的代码基于这个答案，但我只能在 csv 上为每个收据添加一行，并连接所有属性 2，或者只返回包含 Fields2 元素和 Field2 的收据，即：要么：

Attribute1,Attribute2,Attribute3,Attribute4
a,1 2,,4a
b,,,4b
c,3,c3,4c

或这个：

Attribute1,Attribute2,Attribute3,Attribute4
a,1,,4a
a,2,,4a
c,3,c3,4c

我的第一种情况的代码是：

declare option output:method "csv";
declare option output:csv "header=yes, separator=comma";

    declare context item := document {<Receipts>
    <Receipt>
        <Field1 attribute1="a"/>
        <Fields2>
            <Field2 attribute2="1"/>
            <Field2 attribute2="2"/>
        </Fields2>
        <Field4 attribute4="4a"/>
    </Receipt>
    <Receipt>
        <Field1 attribute1="b"/>
        <Field4 attribute4="4b"/>
    </Receipt>
    <Receipt>
        <Field1 attribute1="c"/>
        <Fields2>
            <Field2 attribute2="3"/>
        </Fields2>
        <Field3 attribute3="c3"/>
        <Field4 attribute4="4c"/>
    </Receipt>
</Receipts>};



for $x in //Receipt
return 
<csv>
  <record>
    <Attribute1>{$x/Field1/@attribute1/data()}</Attribute1>
    <Attribute2>{$x/Fields2/Field2/@attribute2/data()}</Attribute2>
    <Attribute3>{$x/Field3/@attribute3/data()}</Attribute3>
    <Attribute4>{$x/Field4/@attribute4/data()}</Attribute4>
  </record>
</csv>

对于第二种情况，它将是：

declare option output:method "csv";
declare option output:csv "header=yes, separator=comma";

    declare context item := document {<Receipts>
    <Receipt>
        <Field1 attribute1="a"/>
        <Fields2>
            <Field2 attribute2="1"/>
            <Field2 attribute2="2"/>
        </Fields2>
        <Field4 attribute4="4a"/>
    </Receipt>
    <Receipt>
        <Field1 attribute1="b"/>
        <Field4 attribute4="4b"/>
    </Receipt>
    <Receipt>
        <Field1 attribute1="c"/>
        <Fields2>
            <Field2 attribute2="3"/>
        </Fields2>
        <Field3 attribute3="c3"/>
        <Field4 attribute4="4c"/>
    </Receipt>
</Receipts>};



for $x in //Receipt for $y in $x/Fields2/Field2
return 
<csv>
  <record>
    <Attribute1>{$x/Field1/@attribute1/data()}</Attribute1>
    <Attribute2>{$y/@attribute2/data()}</Attribute2>
    <Attribute3>{$x/Field3/@attribute3/data()}</Attribute3>
    <Attribute4>{$x/Field4/@attribute4/data()}</Attribute4>
  </record>
</csv>
4

1 回答 1

1

经过更深入的搜索，我找到了解决方案。在第二个 for 循环的第二个选项上，您应该添加该allowing empty函数，以便代码最终看起来像这样：

declare option output:method "csv";
declare option output:csv "header=yes, separator=comma";

    declare context item := document {<Receipts>
    <Receipt>
        <Field1 attribute1="a"/>
        <Fields2>
            <Field2 attribute2="1"/>
            <Field2 attribute2="2"/>
        </Fields2>
        <Field4 attribute4="4a"/>
    </Receipt>
    <Receipt>
        <Field1 attribute1="b"/>
        <Field4 attribute4="4b"/>
    </Receipt>
    <Receipt>
        <Field1 attribute1="c"/>
        <Fields2>
            <Field2 attribute2="3"/>
        </Fields2>
        <Field3 attribute3="c3"/>
        <Field4 attribute4="4c"/>
    </Receipt>
</Receipts>};



for $x in //Receipt for $y allowing empty in $x/Fields2/Field2
return 
<csv>
  <record>
    <Attribute1>{$x/Field1/@attribute1/data()}</Attribute1>
    <Attribute2>{$y/@attribute2/data()}</Attribute2>
    <Attribute3>{$x/Field3/@attribute3/data()}</Attribute3>
    <Attribute4>{$x/Field4/@attribute4/data()}</Attribute4>
  </record>
</csv>

返回委托人 CSV：

Attribute1,Attribute2,Attribute3,Attribute4
a,1,,4a
a,2,,4a
b,,,4b
c,3,c3,4c
于 2020-06-30T18:20:58.073 回答