我看到这个问题被问了很多次,但我没有找到解决我的问题的方法。所以错误是:
Error on line 2 of document file...doc.xsd: cvc-elt.1: Cannot find the declaration of element 'xs:schema'
XSD 文件中的代码:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="Collection" >
<xs:complexType>
<xs:sequence>
<xs:element name="Description" type="xs:string"/>
<xs:element name="Recipe" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="Title" type="xs:string"/>
<xs:element name="Ingredients">
<xs:complexType>
<xs:element name="Ingredient" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:attribute name="name" type="xs:string" use="required"/>
<xs:attribute name="amount" type="xs:integer" use="required"/>
<xs:attribute name="unit" type="xs:string" use="required"/>
</xs:complexType>
</xs:element>
</xs:complexType>
</xs:element>
<xs:element name="Preparation">
<xs:complexType>
<xs:element name="Step" type="xs:string minOccurs="0" maxOccurs="unbounded"/>"
</xs:complexType>
</xs:element>
<xs:element name="Comment" type="xs:string" minOccurs="0"/>
<xs:element name="Nutrients">
<xs:complexType>
<xs:attribute name="proteins" type="xs:integer" use="required"/>
<xs:attribute name="carbohidrati" type="xs:NMTOKEN" use="required"/>
<xs:attribute name="fat" type="xs:integer" use="choice"/>
<xs:attribute name="vitamins" type="xs:NMTOKEN" use="required"/>
<xs:attribute name="calories" type="xs:float" use="required"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
XML 文件中的代码:
<?xml version="1.0" encoding="UTF-8"?>
<Collection xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="src/doc.xsd">
<Description>Nu prea merge</Description>
<Recipe>
<Title>Paste</Title>
<Ingredients>
<Ingredient name="paste" amount="1" unit="pachet"></Ingredient>
</Ingredients>
<Preparation>
<Step>Fierbere</Step>
<Step>Servire</Step>
</Preparation>
<Nutrients proteins="2" carbohidrati="2" fat="da" vitamins="4" calories="1000.9"></Nutrients>
</Recipe>
</Collection>
我的Java类中的代码:
import java.io.File;
import java.io.IOException;
import org.jdom2.Document;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
import org.jdom2.input.sax.XMLReaders;
import org.jdom2.output.Format;
import org.jdom2.output.XMLOutputter;
public class Main {
public static void main(String[] args) {
File newFile = new File("src/doc.xsd");
Document doc = null;
SAXBuilder sbd = new SAXBuilder(XMLReaders.XSDVALIDATING);
try {
doc = sbd.build(newFile);
} catch (JDOMException | IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
XMLOutputter outputDoc = new XMLOutputter();
outputDoc.setFormat(Format.getPrettyFormat());
try{
outputDoc.output(doc,System.out);
//outputDoc.output(doc, new FileWriter("src/myXmlDoc2.xml"));
}
catch(Exception e){
System.out.println("Eroare la parsarea documentului XML!");
}
}
}
如果有人对可能的问题有任何想法,请帮助我!
最佳答案
假设您的 XML 已修复,那么您应该按如下方式更改 XSD:
- 修复 @Andreas 提到的额外
"
。 - 在
xs:complexType
下的两个位置添加xs:sequence
。 - 将
@fat
类型更改为xs:string
。 - 将
use="choice"
更改为use="optional"
。
总之,此 XSD 将成功验证您的 XML:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="Collection" >
<xs:complexType>
<xs:sequence>
<xs:element name="Description" type="xs:string"/>
<xs:element name="Recipe" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="Title" type="xs:string"/>
<xs:element name="Ingredients">
<xs:complexType>
<xs:sequence>
<xs:element name="Ingredient" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:attribute name="name" type="xs:string" use="required"/>
<xs:attribute name="amount" type="xs:integer" use="required"/>
<xs:attribute name="unit" type="xs:string" use="required"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Preparation">
<xs:complexType>
<xs:sequence>
<xs:element name="Step" type="xs:string" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Comment" type="xs:string" minOccurs="0"/>
<xs:element name="Nutrients">
<xs:complexType>
<xs:attribute name="proteins" type="xs:integer" use="required"/>
<xs:attribute name="carbohidrati" type="xs:NMTOKEN" use="required"/>
<xs:attribute name="fat" type="xs:string" use="optional"/>
<xs:attribute name="vitamins" type="xs:NMTOKEN" use="required"/>
<xs:attribute name="calories" type="xs:float" use="required"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
当然,您还必须检查您的 Java 代码。 (提示:当您确实想要根据 XSD 验证 XML 时,请确保您没有将 XSD 验证为 XML。)
关于java - XSD 验证错误 : Cannot find the declaration of element 'xs:schema' ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40292388/