ルートの下にある複数の要素で複雑なXML属性を解析する - JAXBおよびオブジェクトモデルを作成する

Question

XML文字列をObjectに解析する必要があります。

国type属性は、属性と等しいに存在する値のタイプを示すクラス

public class Country { 

    private String Country_Name; 
    private String Country_Capital; 
    private String Country_Foundation_Date; 
    private String Country_Continent; 
    private String Country_Population; 

    public String getCountry_Name() { 
     return Country_Name; 
    } 
    public void setCountry_Name(String country_Name) { 
     Country_Name = country_Name; 
    } 
    public String getCountry_Capital() { 
     return Country_Capital; 
    } 
    public void setCountry_Capital(String country_Capital) { 
     Country_Capital = country_Capital; 
    } 
    public String getCountry_Foundation_Date() { 
     return Country_Foundation_Date; 
    } 
    public void setCountry_Foundation_Date(String country_Foundation_Date) { 
     Country_Foundation_Date = country_Foundation_Date; 
    } 
    public String getCountry_Continent() { 
     return Country_Continent; 
    } 
    public void setCountry_Continent(String country_Continent) { 
     Country_Continent = country_Continent; 
    } 
    public String getCountry_Population() { 
     return Country_Population; 
    } 
    public void setCountry_Population(String country_Population) { 
     Country_Population = country_Population; 
    } 
} 

解析コードの実装

import java.io.StringReader; 

    import javax.xml.bind.JAXBContext; 
    import javax.xml.bind.JAXBElement; 
    import javax.xml.bind.Unmarshaller; 
    import javax.xml.transform.stream.StreamSource; 

    public class ParseXMLStringtoObject { 

     public static String getXMLString() { 

      StringBuilder returnString = new StringBuilder(); 
      returnString.append("<output xmlprop = \"somevalue\"> "); 
      returnString.append("<Country> "); 
      returnString.append("<Country_Name equals=\"Spain\" type=\"1\" /> "); 
      returnString.append("<Country_Capital equals = \"Madrid\" type=\"1\" /> "); 
      returnString.append("<Country_Foundation_Date equals=\"1469-10-19\" type=\"3\" /> "); 
      returnString.append("<Country_Continent equals=\"Europe\" type = \"1\" /> "); 
      returnString.append("<Country_Population equals=\"45\" type = \"2\" /> "); 
      returnString.append("</Country> "); 

      return returnString.toString(); 
     } 

     public static Object getObjectFromStringXml(Class<Country> country) 
       throws IllegalAccessException, InstantiationException { 
      Object obj = getObject(country.newInstance()); 
      try { 
       StringReader reader = new StringReader(getXMLString()); 
       JAXBContext context = JAXBContext.newInstance(country); 
       Unmarshaller jaxbUnmarshaller = context.createUnmarshaller(); 
       JAXBElement<?> root = jaxbUnmarshaller.unmarshal(new StreamSource(reader), country); 
       obj = root.getValue(); 
      } catch (Exception e) { 
       System.out.printf("Exception occoured while unmarshalling xml String to " + obj.getClass() +" Object", e); 
      } 
      return obj; 
     } 

     private static Object getObject(Object obj) { 
      if (obj instanceof Country) { 
       obj = (Country) obj; 
      } 
      return obj; 
     } 

     public static void main(String[] args) { 
      Country country = new Country(); 
      //Class<Country> countryObj = new Class<Country>(); // I don't know how to convert my Country object 
      //or don't know the input value to the getObjectFromStringXml method 


      ParseXMLStringtoObject parseXML = new ParseXMLStringtoObject(); 
      try{ 
//This is the place I have the doubt to call the parse method, regarding input    
Object obj = parseXML.getObjectFromStringXml(Class<Country> countryObj); 
      } 
      catch(Exception e) { 
       e.printStackTrace(); 
      } 

     } 
    } 

以下のクラスとXML文字列の詳細を見つけてください。たとえば、1は文字列を表し、2はintを表し、3はリストを表します。

上記のxml文字列をJavaオブジェクトにマップする解決策を誰にでも教えてもらえますか。

Answer 1

あなたは以下のようなJAXBのものを使用してJavaオブジェクトに非整列化しようとすることができます

public static Object getObjectFromStringXml(String xml, Class<Country> country) 
       throws IllegalAccessException, InstantiationException { 
      Object obj = getObject(country.newInstance()); 
      try { 
       StringReader reader = new StringReader(xml); 
       JAXBContext context = JAXBContext.newInstance(country); 
       Unmarshaller jaxbUnmarshaller = context.createUnmarshaller(); 
       JAXBElement<?> root = jaxbUnmarshaller.unmarshal(new StreamSource(
         reader), country); 
       obj = root.getValue(); 
      } catch (Exception e) { 
       log.info("Exception occoured while unmarshalling xml String to " + obj.getClass() +" Object", e); 
      } 
      return obj; 
     } 

     private static Object getObject(Object obj) { 
      if (obj instanceof Country) { 
       obj = (Country) obj; 
      } 
      return obj; 
     }