@XmlSchemaType（name =「normalizedString」）和@XmlJavaTypeAdapter（NormalizedStringAdapter.class）之間的JAXB區別

Question

我正在編寫一個沒有XSD編譯的JAXB類。

可有人告訴我

@XmlSchemaType(name = "normalizedString") 
private String normalized; 

和

@XmlJavaTypeAdapter(NormalizedStringAdapter.class) 
private String normalized; 

之間的區別？

Answer 1

@XmlSchemaType(name = "normalizedString") 
private String normalized; 

當使用上述註釋時，XSD：規格化類型將被用於產生一個XML模式時對應於該屬性的屬性/元素指定。

@XmlJavaTypeAdapter(NormalizedStringAdapter.class) 
private String normalized; 

的NormalizedStringAdapter確實的解組操作期間的工作：換行符，回車和製表符被刪除。

例

input.xml中

<?xml version="1.0" encoding="UTF-8"?> 
<root> 
    <adapter>  A  B 
C  </adapter> 
    <schemaType>  A  B 
C  </schemaType> 
    <control>  A  B 
C  </control> 
</root> 

根

package forum383861; 

import javax.xml.bind.annotation.*; 
import javax.xml.bind.annotation.adapters.*; 

@XmlRootElement 
@XmlType(propOrder={"adapter", "schemaType", "control"}) 
public class Root { 

    private String adapter; 
    private String schemaType; 
    private String control; 

    @XmlJavaTypeAdapter(NormalizedStringAdapter.class) 
    public String getAdapter() { 
     return adapter; 
    } 

    public void setAdapter(String adpater) { 
     this.adapter = adpater; 
    } 

    @XmlSchemaType(name="normalizedString") 
    public String getSchemaType() { 
     return schemaType; 
    } 

    public void setSchemaType(String schemaType) { 
     this.schemaType = schemaType; 
    } 

    public String getControl() { 
     return control; 
    } 

    public void setControl(String control) { 
     this.control = control; 
    } 

} 

演示

package forum383861; 

import java.io.*; 
import javax.xml.bind.*; 
import javax.xml.transform.Result; 
import javax.xml.transform.stream.StreamResult; 

public class Demo { 

    public static void main(String[] args) throws Exception { 
     JAXBContext jc = JAXBContext.newInstance(Root.class); 

     Unmarshaller unmarshaller = jc.createUnmarshaller(); 
     File xml = new File("src/forum383861/input.xml"); 
     Root root = (Root) unmarshaller.unmarshal(xml); 

     Marshaller marshaller = jc.createMarshaller(); 
     marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); 
     marshaller.marshal(root, System.out); 

     System.out.println(); 

     jc.generateSchema(new SchemaOutputResolver() { 

      @Override 
      public Result createOutput(String arg0, String arg1) throws IOException { 
       StreamResult result = new StreamResult(System.out); 
       result.setSystemId(arg1); 
       return result; 
      } 

     }); 
    } 

} 

輸出

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> 
<root> 
    <adapter>  A  B C  </adapter> 
    <schemaType>  A  B 
C  </schemaType> 
    <control>  A  B 
C  </control> 
</root> 

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> 
<xs:schema version="1.0" xmlns:xs="http://www.w3.org/2001/XMLSchema"> 

    <xs:element name="root" type="root"/> 

    <xs:complexType name="root"> 
    <xs:sequence> 
     <xs:element name="adapter" type="xs:string" minOccurs="0"/> 
     <xs:element name="schemaType" type="xs:normalizedString" minOccurs="0"/> 
     <xs:element name="control" type="xs:string" minOccurs="0"/> 
    </xs:sequence> 
    </xs:complexType> 
</xs:schema>