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[英]Cannot find the declaration of element error for simple schema validation via code
[英]XSD validation error: Cannot find the declaration of element 'xs:schema'
我看到這個問題被問過很多次,但是我沒有找到解決問題的方法。 所以錯誤是:
文檔文件第2行出現錯誤... doc.xsd:cvc-elt.1:找不到元素'xs:schema'的聲明
XSD文件中的代碼:
<?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文件中的代碼:
<?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類中的代碼:
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!");
}
}
}
如果有人對可能的問題有任何想法,請幫助我!
假設您的XML是固定的,那么您應該按如下所示更改XSD:
"
。 xs:complexType
的兩個位置添加xs:sequence
。 @fat
的類型更改為xs:string
。 use="choice"
更改為use="optional"
。 總之,此XSD將成功驗證您的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>
當然,您還必須檢查Java代碼。 (提示:當您確實要針對XSD驗證XML時,請確保未將XSD驗證為XML。)
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