Java Jaxb注释-从xml元素提取xml值
1.)我有一个XSD文件(我无法控制),我使用JAXB将其转换为对象模型 2.)我有一个XML格式的数据库摘录。XML元素标记名严格地说是表的字段名 3.)我使用注释将xml元素映射到Java类 问:有没有办法在XSD文件中维护元素名,只提取xml元素的值 JAXB注释类:Java Jaxb注释-从xml元素提取xml值,java,annotations,jaxb,Java,Annotations,Jaxb,1.)我有一个XSD文件(我无法控制),我使用JAXB将其转换为对象模型 2.)我有一个XML格式的数据库摘录。XML元素标记名严格地说是表的字段名 3.)我使用注释将xml元素映射到Java类 问:有没有办法在XSD文件中维护元素名,只提取xml元素的值 JAXB注释类: @XmlAccessorType(XmlAccessType.FIELD) @XmlType(name = "Item", propOrder = { "code", "name", "price"
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Item", propOrder = {
"code",
"name",
"price"
})
@XmlRootElement(name="inventory")
public class Item {
@XmlElement(name="catalog_num", required = true)
protected String code;
@XmlElement(name="catalog_descrip", required = true)
protected String name;
@XmlElement(name="prod_price")
protected double price;
public String getCode() {
return code;
}
//etc
数据库xml文件的摘录:
<?xml version="1.0"?>
<inventory>
<catalog_num>I001</catalog_num>
<catalog_descrip>Descriptive Name of Product</catalog_descrip>
<prod_price>11200</prod_price>
</inventory>
在上面的代码中,我尝试了注释方法而不是字段,但我得到了相同的结果。我只想从xml元素中提取值,但不想更改元素名称
我希望我说的有道理。如果我理解正确,您希望以两种不同的方式封送和解封送对象。虽然不完全是预期的情况,但您可能可以使用一个。有一个。注意:我是负责人,也是JAXB()专家组的成员 MOXy提供了一个扩展,您可以通过XML文档应用第二个XML绑定。此绑定文档可以用于添加元数据,或者在
xml-mapping-metadata complete=“true”
完全替换Java模型上JAXB注释提供的元数据时使用
<?xml version="1.0"?>
<xml-bindings
xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm"
package-name="forum6838882"
xml-mapping-metadata-complete="true">
<java-types>
<java-type name="Item" xml-accessor-type="FIELD">
<xml-root-element name="Item"/>
</java-type>
</java-types>
</xml-bindings>
创建JAXBContext时,绑定文件作为参数传递:
Map<String, Object> properties = new HashMap<String, Object>();
properties.put(JAXBContextFactory.ECLIPSELINK_OXM_XML_KEY, "forum6838882/binding.xml");
JAXBContext resultJC = JAXBContext.newInstance(new Class[] {Item.class}, properties);
Map properties=newhashmap();
put(JAXBContextFactory.ECLIPSELINK_OXM_XML_KEY,“forum6838882/binding.XML”);
JAXBContext resultJC=JAXBContext.newInstance(新类[]{Item.Class},属性);
为了解决您的问题,您可以创建一个JAXBContext来处理数据库文档(使用带注释的类),并创建第二个JAXBContext来处理使用MOXy绑定文件的结果格式。下面是它的外观:
package forum6838882;
import java.io.File;
import java.util.HashMap;
import java.util.Map;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import org.eclipse.persistence.jaxb.JAXBContextFactory;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext databaseJC = JAXBContext.newInstance(Item.class);
Unmarshaller databaseUnmarshaller = databaseJC.createUnmarshaller();
File databaseXML = new File("src/forum6838882/database.xml");
Item item = (Item) databaseUnmarshaller.unmarshal(databaseXML);
Map<String, Object> properties = new HashMap<String, Object>();
properties.put(JAXBContextFactory.ECLIPSELINK_OXM_XML_KEY, "forum6838882/binding.xml");
JAXBContext resultJC = JAXBContext.newInstance(new Class[] {Item.class}, properties);
Marshaller resultMarshaller = resultJC.createMarshaller();
resultMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
resultMarshaller.marshal(item, System.out);
}
}
用于UM6838882的包;
导入java.io.File;
导入java.util.HashMap;
导入java.util.Map;
导入javax.xml.bind.JAXBContext;
导入javax.xml.bind.Marshaller;
导入javax.xml.bind.Unmarshaller;
导入org.eclipse.persistence.jaxb.JAXBContextFactory;
公开课演示{
公共静态void main(字符串[]args)引发异常{
JAXBContext数据库jc=JAXBContext.newInstance(Item.class);
Unmarshaller databaseUnmarshaller=databaseJC.createUnmarshaller();
File databaseXML=新文件(“src/forum6838882/database.xml”);
Item=(Item)databaseUnmarshaller.unmarshal(databaseXML);
映射属性=新的HashMap();
put(JAXBContextFactory.ECLIPSELINK_OXM_XML_KEY,“forum6838882/binding.XML”);
JAXBContext resultJC=JAXBContext.newInstance(新类[]{Item.Class},属性);
Marshaller resultMarshaller=resultJC.createMarshaller();
setProperty(Marshaller.JAXB_格式化的_输出,true);
resultMarshaller.Marshall(项目,系统输出);
}
}
有关更详细的示例,请参见:
package forum6838882;
import java.io.File;
import java.util.HashMap;
import java.util.Map;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import org.eclipse.persistence.jaxb.JAXBContextFactory;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext databaseJC = JAXBContext.newInstance(Item.class);
Unmarshaller databaseUnmarshaller = databaseJC.createUnmarshaller();
File databaseXML = new File("src/forum6838882/database.xml");
Item item = (Item) databaseUnmarshaller.unmarshal(databaseXML);
Map<String, Object> properties = new HashMap<String, Object>();
properties.put(JAXBContextFactory.ECLIPSELINK_OXM_XML_KEY, "forum6838882/binding.xml");
JAXBContext resultJC = JAXBContext.newInstance(new Class[] {Item.class}, properties);
Marshaller resultMarshaller = resultJC.createMarshaller();
resultMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
resultMarshaller.marshal(item, System.out);
}
}