如何将绿豆结构映射到一个不同的模式与JAX-RS

Question

我有这个bean

@XmlRootElement 
class Test { 
    boolean someValue; 
    List<Field> fields; 
} 

我想序列化作为

<fields> 
    <field> 
     <name>someValue</name> 
     <value>...</value> 
    </field> 
</fields> 
<fields> 
    <field> 
     <name>otherValue</name> 
     <value>...</value> 
    </field> 
</fields> 

（或JSON）

我应该怎么做，最好使用jaxb注释？

我使用球衣，但答案doens't必须是特定于它。

Answer 1

以下情况如何？

使用EclipseLink JAXB (MOXy)您可以执行以下操作。注意：我是MOXy的技术主管。

测试

import java.util.ArrayList; 
import java.util.List; 

import javax.xml.bind.Unmarshaller; 
import javax.xml.bind.annotation.XmlAccessorType; 
import javax.xml.bind.annotation.XmlAccessType; 
import javax.xml.bind.annotation.XmlRootElement; 
import javax.xml.bind.annotation.XmlType; 
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter; 

import org.eclipse.persistence.oxm.annotations.XmlPath; 

@XmlRootElement 
@XmlType(propOrder={"someValue", "fields"}) 
@XmlAccessorType(XmlAccessType.FIELD) 
class Test { 

    @XmlJavaTypeAdapter(SomeValueAdapter.class) 
    @XmlPath("fields[1]") 
    boolean someValue; 

    @XmlJavaTypeAdapter(FieldsAdapter.class) 
    List<Field> fields = new ArrayList<Field>(); 

    public Boolean isSomeValue() { 
     return someValue; 
    } 

    public void setSomeValue(boolean someValue) { 
     this.someValue = someValue; 
    } 

    public List<Field> getFields() { 
     return fields; 
    } 

    public void setFields(List<Field> fields) { 
     this.fields = fields; 
    } 

    public void afterUnmarshal(Unmarshaller unmarshaller, Object parent) { 
     for(Field field : fields) { 
      if("someValue".equals(field.getName())) { 
       someValue = Boolean.valueOf(field.getValue()); 
       fields.remove(field); 
      } 
     } 
    } 

} 

场

public class Field { 

    private String name; 
    private String value; 

    public String getName() { 
     return name; 
    } 

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

    public String getValue() { 
     return value; 
    } 

    public void setValue(String value) { 
     this.value = value; 
    } 

} 

SomeValueAdapter

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

public class SomeValueAdapter extends XmlAdapter<AdaptedField, Boolean> { 

    @Override 
    public Boolean unmarshal(AdaptedField v) throws Exception { 
     String value = v.getField().getValue(); 
     return Boolean.valueOf(value); 
    } 

    @Override 
    public AdaptedField marshal(Boolean v) throws Exception { 
     AdaptedField adaptedField = new AdaptedField(); 
     Field field = new Field(); 
     field.setName("someValue"); 
     field.setValue(String.valueOf(v)); 
     adaptedField.setField(field); 
     return adaptedField; 
    } 

} 

FieldsAdapter

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

public class FieldsAdapter extends XmlAdapter<AdaptedField, Field> { 

    @Override 
    public Field unmarshal(AdaptedField v) throws Exception { 
     return v.getField(); 
    } 

    @Override 
    public AdaptedField marshal(Field v) throws Exception { 
     AdaptedField adaptedField = new AdaptedField(); 
     adaptedField.setField(v); 
     return adaptedField; 
    } 

} 

AdaptedField

public class AdaptedField { 

    private Field field; 

    public Field getField() { 
     return field; 
    } 

    public void setField(Field field) { 
     this.field = field; 
    } 

} 

演示

进口的java.io.File;

import javax.xml.bind.JAXBContext; 
import javax.xml.bind.Marshaller; 
import javax.xml.bind.Unmarshaller; 

public class Demo { 

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

     Unmarshaller unmarshaller = jc.createUnmarshaller(); 
     Test test = (Test) unmarshaller.unmarshal(new File("input.xml")); 

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

} 

input.xml中

<?xml version="1.0" encoding="UTF-8"?> 
<test> 
    <fields> 
     <field> 
     <name>someValue</name> 
     <value>true</value> 
     </field> 
    </fields> 
    <fields> 
     <field> 
     <name>otherValue</name> 
     <value>1</value> 
     </field> 
    </fields> 
    <fields> 
     <field> 
     <name>anotherValue</name> 
     <value>2</value> 
     </field> 
    </fields> 
</test> 

更多信息

• http://bdoughan.blogspot.com/2011/05/specifying-eclipselink-moxy-as-your.html
• http://bdoughan.blogspot.com/2010/08/creating-restful-web-service-part-35.html
• http://bdoughan.blogspot.com/2010/07/xpath-based-mapping.html