XSL如何根据条件求和节点值

Question

XML文件

public class PlacesListExperienceCartItem {

    @Id
    String id;

    String customerId;

    String placeId;

    Double totalPrice;

    List<PlacesExperienceCartConfirmRequest> experienceList;

    private String bookingId;

    private String name;

    private String phone;

    private String email;

    private Location deliveryLocation;

    private List<String> selectedDates;


    public List<String> getSelectedDates() {
        return selectedDates;
    }

    public void setSelectedDates(List<String> selectedDates) {
        this.selectedDates = selectedDates;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getPlaceId() {
        return placeId;
    }

    public void setPlaceId(String placeId) {
        this.placeId = placeId;
    }

    public Double getTotalPrice() {
        return totalPrice;
    }

    public void setTotalPrice(Double totalPrice) {
        this.totalPrice = totalPrice;
    }

    public List<PlacesExperienceCartConfirmRequest> getExperienceList() {
        return experienceList;
    }

    public void setExperienceList(List<PlacesExperienceCartConfirmRequest> experienceList) {
        this.experienceList = experienceList;
    }

    public String getBookingId() {
        return bookingId;
    }

    public void setBookingId(String bookingId) {
        this.bookingId = bookingId;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public Location getDeliveryLocation() {
        return deliveryLocation;
    }

    public void setDeliveryLocation(Location deliveryLocation) {
        this.deliveryLocation = deliveryLocation;
    }

    public String getCustomerId() {
        return customerId;
    }

    public void setCustomerId(String customerId) {
        this.customerId = customerId;
    }

}

XSL文件

<?xml version="1.0"?>

<books>
<book>
    <title fiction="true">Happy Potter</title>
    <author>J. K. Rowling et al</author>
    <price>29.99</price>
</book>

<book>
    <title fiction="true">The Hobbit</title>
    <author>J.R.R. Tolkien</author>
    <price>25.99</price>
</book>

<book>
    <title fiction="true">Greater than 30</title>
    <author>J.R.R. Tolkien</author>
    <price>31.99</price>
</book>

<book>
    <title fiction="false">Non-Fiction</title>
    <author>J.R.R. Tolkien</author>
    <price>19.99</price>
</book>

所以我的XSL将根据给定的条件从XML中提取数据。 当<xsl:for-each select="books/book"> <xsl:if test="(title[@fiction='false']) and (price &lt; 30)"> <span name="title"><xsl:value-of select="title"/></span><br/> <span name="author"><xsl:value-of select="author"/></span><br/> <span name="price"><xsl:value-of select="price"/></span><br/><br/> </xsl:if> </xsl:for-each> Total: <span name="total"><xsl:value-of select="sum(books/book/price)"/></span> 和fiction=true时。但我不知道如何总和总价值。任何建议将不胜感激。

Answer 1

使用谓词sum(books/book[title[@fiction='false'] and price < 30]/price)。

你也可以缩短

<xsl:for-each select="books/book">
<xsl:if test="(title[@fiction='false']) and (price &lt; 30)">

到

<xsl:for-each select="books/book[title[@fiction='false'] and price &lt; 30]">