使用xstream將xml和bean互轉

pom.xml

<dependency>
    <groupId>com.thoughtworks.xstream</groupId>
    <artifactId>xstream</artifactId>
    <version>1.3.1</version>

</dependency>

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
public class XmlUtil{
    public static String toXml(Object obj){
        XStream xstream=new XStream();
//        XStream xstream=new XStream(new DomDriver()); //直接用jaxp dom來解釋
//        XStream xstream=new XStream(new DomDriver("utf-8")); //指定編碼解析器,直接用jaxp dom來解釋
        
        ////如果沒有這句，xml中的根元素會是<包.類名>；或者說：註解根本就沒生效，所以的元素名就是類的屬性
        xstream.processAnnotations(obj.getClass()); //通過註解方式的，一定要有這句話
        return xstream.toXML(obj);
    }
    public static <T> T  toBean(String xmlStr,Class<T> cls){
        //注意：不是new Xstream(); 否則報錯：java.lang.NoClassDefFoundError: org/xmlpull/v1/XmlPullParserFactory
        XStream xstream=new XStream(new DomDriver());
        xstream.processAnnotations(cls);
        @SuppressWarnings("unchecked")
T obj=(T)xstream.fromXML(xmlStr);
        return obj;            
    } 
    public static boolean toXMLFile(Object obj, String absPath, String fileName ){
        String strXml = toXml(obj);
        String filePath = absPath + fileName;
        File file = new File(filePath);
        if(!file.exists()){
            try {
                file.createNewFile();
            } catch (IOException e) {
                return false ;
            }
        }// end if 
        OutputStream ous = null ;
        try {
            ous = new FileOutputStream(file);
            ous.write(strXml.getBytes());
            ous.flush();
        } catch (Exception e1) {
            return false;
        }finally{
            if(ous != null )
                try {
                    ous.close();
                } catch (IOException e) {
                    
                }
        }
        return true ;
    }
}