XML与对象互转

使用jaxb xml与对象javabean之间转换,对象生成soap报文xml,soap报文xml转换为对象


import java.io.StringReader;
import java.io.StringWriter;
import java.util.Collection;


import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlAnyElement;
import javax.xml.namespace.QName;


import org.apache.commons.lang.StringUtils;


/**
 * 使用Jaxb2.0实现XML<->Java Object的Binder.
 * 
 * 特别支持Root对象是List的情形.
 * 
 */
@SuppressWarnings("rawtypes")
public class JaxbBinder {
//多线程安全的Context.
private JAXBContext jaxbContext;


/**
* @param types 所有需要序列化的Root对象的类型.
*/
public JaxbBinder(Class<?>... types) {
try {
jaxbContext = JAXBContext.newInstance(types);
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}


/**
* Java Object->Xml.
*/
public String toXml(Object root, String encoding) {
try {
StringWriter writer = new StringWriter();
createMarshaller(encoding).marshal(root, writer);
return writer.toString();
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}


/**
* Java Object->Xml, 特别支持对Root Element是Collection的情形.
*/
public String toXml(Collection root, String rootName, String encoding) {
try {
CollectionWrapper wrapper = new CollectionWrapper();
wrapper.collection = root;


JAXBElement<CollectionWrapper> wrapperElement = new JAXBElement<CollectionWrapper>(new QName(rootName),
CollectionWrapper.class, wrapper);


StringWriter writer = new StringWriter();
createMarshaller(encoding).marshal(wrapperElement, writer);


return writer.toString();
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}


/**
* Xml->Java Object.
*/
@SuppressWarnings("unchecked")
public <T> T fromXml(String xml) {
try {
StringReader reader = new StringReader(xml);
return (T) createUnmarshaller().unmarshal(reader);
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}


/**
* 创建Marshaller, 设定encoding(可为Null).
*/
public Marshaller createMarshaller(String encoding) {
try {
Marshaller marshaller = jaxbContext.createMarshaller();


marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);


if (StringUtils.isNotBlank(encoding)) {
marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding);
}
return marshaller;
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}


/**
* 创建UnMarshaller.
*/
public Unmarshaller createUnmarshaller() {
try {
return jaxbContext.createUnmarshaller();
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}


/**
* 封装Root Element 是 Collection的情况.
*/
public static class CollectionWrapper {
@XmlAnyElement
protected Collection collection;
}
}


原方法
@SuppressWarnings("unchecked")
    public <T> T fromXML(String fileName) {
        return (T)fromXML(new File(fileName));
    }




    @SuppressWarnings("unchecked")
    public <T> T fromXML(File file) {
        try {
            Unmarshaller unmarshaller = createUnmarshaller();
            return (T) unmarshaller.unmarshal(file);
        } catch (JAXBException e) {
            throw new RuntimeException(e);
        }
    }




    @SuppressWarnings("unchecked")
    public <T> T fromXML(InputStream stream) {
        try {
            Unmarshaller unmarshaller = createUnmarshaller();
            return (T) unmarshaller.unmarshal(stream);
        } catch (JAXBException e) {
            throw new RuntimeException(e);
        }
    }