java对象和xml相互转换
Castor-xml.jar包
――Castor可以完成Java和XML的相互转换：
1）利用mapping配置，编组JavaObject、解组XML
在此之前我们设置过mapping.xml。如果不设置，肯定是不能转换成我们想要的XML的。那么，mapping.xml配置文件是怎么配置Account这个对象的呢
mapping.xml配置如下
<?xml version="1.0"encoding="UTF-8"?>
<!DOCTYPE mapping PUBLIC"-//EXOLAB/Castor Mapping DTD Version 1.0//EN""http://castor.org/mapping.dtd">
<mapping>
<class name="com.hoo.entity.Account"auto-complete="true">
<map-to xml="Account"/>
<field name="id" type="integer">
<bind-xmlname="id" node="attribute" />
</field>
<field name="name" type="string">
<bind-xml name="name" node="element" />
</field>
<field name="email" type="string">
<bind-xml name="email" node="element" />
</field>
<field name="address" type="string">
<bind-xml name="address" node="element" />
</field>
<field name="birthday"type="com.hoo.entity.Birthday">
<bind-xml name="生日" node="element" />
</field>
</class>
<class name="com.hoo.entity.Birthday">
<map-to xml="birthday" />
<field name="birthday" type="string">
<bind-xml name="birthday" node="attribute" />
</field>
</class>
</mapping>
2)转换实现工具类
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import org.exolab.castor.mapping.Mapping;
import org.exolab.castor.mapping.MappingException;
import org.exolab.castor.xml.MarshalException;
import org.exolab.castor.xml.Marshaller;
import org.exolab.castor.xml.Unmarshaller;
import org.exolab.castor.xml.ValidationException;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.xml.sax.InputSource;
import com.pinan.demo.example.dto.User;
public class TranslateXmlTools {
public static String convertDTOtoXml(Object obj) throws Exception {
String returnstr = null;
try {
StringWriter sw = new StringWriter();
Mapping mapping = new Mapping();
Resource input = new ClassPathResource("castor-mapping-DTO.xml");
mapping.loadMapping(new InputSource(input.getInputStream()));
Marshaller unmar = new Marshaller(sw);
unmar.setMapping(mapping);
unmar.marshal(obj);
sw.flush();
returnstr = sw.toString();
} catch (Exception ex) {
ex.printStackTrace();
}
return returnstr;
}
public static Object convertXmltoDTO(String xmlStr) throws Exception {
if (null == xmlStr || "".equals(xmlStr)) {
throw new Exception("xml转dto报错,传入参数为空");
}
Mapping mapping = new Mapping();
Resource input = new ClassPathResource("castor-mapping-DTO.xml");
User user = null;
try {
mapping.loadMapping(new InputSource(input.getInputStream()));
Unmarshaller unmar = new Unmarshaller(User.class);
unmar.setMapping(mapping);
user = (User) unmar.unmarshal(new StringReader(xmlStr));
return user;
} catch (MarshalException ex) {
ex.printStackTrace();
} catch (ValidationException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
} catch (MappingException ex) {
ex.printStackTrace();
} catch (Exception ex) {
ex.printStackTrace();
}
return user;
}
}