package com.xgj.oxm.xstream.quickDemo.convert;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import com.thoughtworks.xstream.converters.ConversionException;
import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
public class DateConverter implements Converter {
    private Locale locale;
    public DateConverter(Locale locale) {
        super();
        this.locale = locale;
    }
    /**
     * 重写该方法，判断需要转换的类型
     */
    @Override
    public boolean canConvert(Class type) {
        return Date.class.isAssignableFrom(type);
    }
    /**
     * 重写该方法，编写Java 到 XML 的转换逻辑
     */
    @Override
    public void marshal(Object source, HierarchicalStreamWriter writer,
            MarshallingContext context) {
        // DateFormat format = DateFormat.getDateInstance(DateFormat.DATE_FIELD,
        // this.locale);
        SimpleDateFormat format = new SimpleDateFormat(
                "yyyy-MM-dd HH:mm:ss", this.locale);
        writer.setValue(format.format(source));
    }
    /**
     * 重写该方法，编写XML 到 Java 的转换逻辑
     */
    @Override
    public Object unmarshal(HierarchicalStreamReader reader,
            UnmarshallingContext context) {
        GregorianCalendar calendar = new GregorianCalendar();
        // DateFormat format = DateFormat.getDateInstance(DateFormat.DATE_FIELD,
        // this.locale);
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",
                this.locale);
        try {
            calendar.setTime(format.parse(reader.getValue()));
        } catch (Exception e) {
            throw new ConversionException(e.getMessage(), e);
        }
        return calendar.getGregorianChange();
    }
}

package com.xgj.oxm.xstream.quickDemo.convert;
import java.text.ParseException;
import java.util.Date;
import java.util.Locale;
import com.thoughtworks.xstream.XStream;
import com.xgj.oxm.xstream.quickDemo.domain.LoginLog;
import com.xgj.oxm.xstream.quickDemo.domain.User;
public class XStreamConverterDemo {
    private static XStream xstream;
    static {
        // 创建一个Xstream实例，使用默认的XPP解析器
        xstream = new XStream();
        // (1)设置类别名，修改默认的全限定名的名称
        xstream.alias("user", User.class);
        xstream.alias("loginLog", LoginLog.class);
        // (2)设置类成员别名 <id>1</id> 改为<userId>1</userId>
        xstream.aliasField("userId", User.class, "id");
        // (3)把LoginLog的userId属性视为xml属性，默认为xml的元素
        xstream.aliasAttribute(LoginLog.class, "userId", "id");
        xstream.useAttributeFor(LoginLog.class, "userId");
        // (4)去掉集合类型生成XML的父节点，即忽略xml中的<logs></logs>标记
        xstream.addImplicitCollection(User.class, "logs");
        // 注册转换器
        xstream.registerConverter(new DateConverter(Locale.CHINESE));
    }
    /**
     * 
     * 
     * @Title: getUser
     * 
     * @Description: 初始化转换对象
     * 
     * @return
     * 
     * @return: User
     * @throws ParseException
     */
    public static User getUser() throws ParseException {
        LoginLog log = new LoginLog();
        log.setIp("127.0.0.1");
        log.setLoginLogId(99);
        log.setUserId(1);
        log.setLoginDate(new Date());
        LoginLog log2 = new LoginLog();
        log2.setIp("192.168.1.1");
        log2.setLoginLogId(22);
        log2.setUserId(2);
        log2.setLoginDate(new Date());
        User user = new User();
        user.setId(1);
        user.setUserName("Artisan");
        user.setPassword("artisan");
        user.setCredits(1000);
        user.setLastVisit(new Date());
        user.addLoginLog(log);
        user.addLoginLog(log2);
        return user;
    }
    /**
     * 
     * 
     * @Title: objectToXml
     * 
     * @Description: Java对象转换成XML
     * 
     * @throws Exception
     * 
     * @return: void
     */
    public static void objectToXml() throws Exception {
        // 获取转换的User对象实例
        User user = getUser();
        // 输出内容到控制台,查看一下
        System.out.println(xstream.toXML(user));
    }
    public static void main(String[] args) throws Exception {
        objectToXml();
    }
}