xmlstarlet提取子HTML元素的值，该元素以不同的值重复

目标： 使用xmlstarlet提取子HTML元素的值，该元素以不同的值重复并导出为CSV

数据：

<?xml version="1.0" encoding="UTF-8"?>
<Library export_date="2020-01-15">
  <Book id="1001">
    <Title>Book 1</Title>
    <Date value="2019-05-16"/>
    <Author value="Name 1"/>
    <Author value="Name 2"/>
    <Author value="Name 3"/>
    <Author value="Name 4"/>
    <Author value="Name 5"/>
    <Author value="Name 6"/>
    <Author value="Name 7"/>
    <Author value="Name 8"/>
    <Author value="Name 9"/>
    <Author value="Name 10"/>
    <Author value="Name 11"/>
    <Author value="Name 12"/>
    <Author value="Name 13"/>
  </Book>
</Library>

xmlstarlet \
    sel -T -t -m /Library/Book \
    -v "concat('"','Title','","',Author/@value,'"')" \
    -n library_books.xml \
    > output.csv

# Remove xmlstarlet quotation bypass, convert to actual quotation
sed -i .bak 's|"|\"|g' output.csv

"Title","Name 1"

"Title","Name 1; Name 2; Name 3; Name 4; Name 5; Name 6; Name 7; Name 8; Name 9; Name 10; Name 11; Name 12; Name 13"

"Title","Name 1
Name 2
Name 3
Name 4
Name 5
Name 6
Name 7
Name 8
Name 9
Name 10
Name 11
Name 12
Name 13"

CSV输出：

<?xml version="1.0" encoding="UTF-8"?>
<Library export_date="2020-01-15">
  <Book id="1001">
    <Title>Book 1</Title>
    <Date value="2019-05-16"/>
    <Author value="Name 1"/>
    <Author value="Name 2"/>
    <Author value="Name 3"/>
    <Author value="Name 4"/>
    <Author value="Name 5"/>
    <Author value="Name 6"/>
    <Author value="Name 7"/>
    <Author value="Name 8"/>
    <Author value="Name 9"/>
    <Author value="Name 10"/>
    <Author value="Name 11"/>
    <Author value="Name 12"/>
    <Author value="Name 13"/>
  </Book>
</Library>

xmlstarlet \
    sel -T -t -m /Library/Book \
    -v "concat('"','Title','","',Author/@value,'"')" \
    -n library_books.xml \
    > output.csv

# Remove xmlstarlet quotation bypass, convert to actual quotation
sed -i .bak 's|"|\"|g' output.csv

"Title","Name 1"

"Title","Name 1; Name 2; Name 3; Name 4; Name 5; Name 6; Name 7; Name 8; Name 9; Name 10; Name 11; Name 12; Name 13"

"Title","Name 1
Name 2
Name 3
Name 4
Name 5
Name 6
Name 7
Name 8
Name 9
Name 10
Name 11
Name 12
Name 13"

所需的CSV输出：

<?xml version="1.0" encoding="UTF-8"?>
<Library export_date="2020-01-15">
  <Book id="1001">
    <Title>Book 1</Title>
    <Date value="2019-05-16"/>
    <Author value="Name 1"/>
    <Author value="Name 2"/>
    <Author value="Name 3"/>
    <Author value="Name 4"/>
    <Author value="Name 5"/>
    <Author value="Name 6"/>
    <Author value="Name 7"/>
    <Author value="Name 8"/>
    <Author value="Name 9"/>
    <Author value="Name 10"/>
    <Author value="Name 11"/>
    <Author value="Name 12"/>
    <Author value="Name 13"/>
  </Book>
</Library>

xmlstarlet \
    sel -T -t -m /Library/Book \
    -v "concat('"','Title','","',Author/@value,'"')" \
    -n library_books.xml \
    > output.csv

# Remove xmlstarlet quotation bypass, convert to actual quotation
sed -i .bak 's|"|\"|g' output.csv

"Title","Name 1"

"Title","Name 1; Name 2; Name 3; Name 4; Name 5; Name 6; Name 7; Name 8; Name 9; Name 10; Name 11; Name 12; Name 13"

"Title","Name 1
Name 2
Name 3
Name 4
Name 5
Name 6
Name 7
Name 8
Name 9
Name 10
Name 11
Name 12
Name 13"

可选CSV所需输出（新行上的值）：

<?xml version="1.0" encoding="UTF-8"?>
<Library export_date="2020-01-15">
  <Book id="1001">
    <Title>Book 1</Title>
    <Date value="2019-05-16"/>
    <Author value="Name 1"/>
    <Author value="Name 2"/>
    <Author value="Name 3"/>
    <Author value="Name 4"/>
    <Author value="Name 5"/>
    <Author value="Name 6"/>
    <Author value="Name 7"/>
    <Author value="Name 8"/>
    <Author value="Name 9"/>
    <Author value="Name 10"/>
    <Author value="Name 11"/>
    <Author value="Name 12"/>
    <Author value="Name 13"/>
  </Book>
</Library>

xmlstarlet \
    sel -T -t -m /Library/Book \
    -v "concat('"','Title','","',Author/@value,'"')" \
    -n library_books.xml \
    > output.csv

# Remove xmlstarlet quotation bypass, convert to actual quotation
sed -i .bak 's|"|\"|g' output.csv

"Title","Name 1"

"Title","Name 1; Name 2; Name 3; Name 4; Name 5; Name 6; Name 7; Name 8; Name 9; Name 10; Name 11; Name 12; Name 13"

"Title","Name 1
Name 2
Name 3
Name 4
Name 5
Name 6
Name 7
Name 8
Name 9
Name 10
Name 11
Name 12
Name 13"

---

在您的系统上尝试以下操作：

xmlstarlet sel -t -v "concat('Title: ',//Title, ' ')" -n -v "//Author/@value" min_library_books.xml > output.csv

---

我的输出是您的第二种选择。

在您的系统上尝试以下方法：

xmlstarlet sel -t -v "concat('Title: ',//Title, ' ')" -n -v "//Author/@value" min_library_books.xml > output.csv

---

我的输出是您的第二种选择。

不幸的是，此输出不正确，添加的Author元素值没有包装引号“Name 1 Name 2…”等，因此当打开CSV时，这是损坏的。不幸的是，此输出不正确，添加的Author元素值没有包装引号“Name 1 Name 2…”因此，当CSV打开时，这是损坏的