[英]XSD validation error: Cannot find the declaration of element 'xs:schema'
I saw that this question was asked many times but I didn't find a solution to my problem. 我看到这个问题被问过很多次,但是我没有找到解决问题的方法。 So the error is: 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' 文档文件第2行出现错误... doc.xsd:cvc-elt.1:找不到元素'xs:schema'的声明
The code in the XSD file : 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>
The code in the XML file : 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>
The code in my Java class: 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!");
}
}
}
If anyone has any idea about the possible problem please help me! 如果有人对可能的问题有任何想法,请帮助我!
Assuming that your XML is fixed, then you should change your XSD as follows: 假设您的XML是固定的,那么您应该按如下所示更改XSD:
"
as mentioned by @Andreas. 修正@Andreas提到的多余的"
。 xs:sequence
under xs:complexType
in two places. 在xs:complexType
的两个位置添加xs:sequence
。 @fat
to xs:string
. 将@fat
的类型更改为xs:string
。 use="choice"
to use="optional"
. 将use="choice"
更改为use="optional"
。 Altogether, this XSD will successfully validate your XML: 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>
Of course, you will also have to check your Java code. 当然,您还必须检查Java代码。 (Hint: make sure you're not validating your XSD as XML when you really want to validating your XML against your XSD.) (提示:当您确实要针对XSD验证XML时,请确保未将XSD验证为XML。)
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