XStream和Google App Engine

Question

嗨，我看到了Google App Engine的XStream实现，但是我仍然得到了一个

“无法构造[class]，因为它没有no-args构造函数”

@Test
public void testNoNoArgs() {
    Car car = new Car(1, "Blue");
    XStream xstream = new XStreamGae();
    String s = xstream.toXML(car);
    Car c = (Car) xstream.fromXML(s);
}

完整的堆栈跟踪在这里： http : //pastebin.com/TGF6N17W

我的应用程序中与XStream相关的依赖关系是：

    <dependency>
        <groupId>com.thoughtworks.xstream</groupId>
        <artifactId>xstream</artifactId>
        <version>1.4.2</version>
    </dependency>
    <dependency>
        <groupId>xpp3</groupId>
        <artifactId>xpp3_min</artifactId>
        <version>1.1.4c</version>
    </dependency>
    <!-- XStreamGae Dependencies -->
    <dependency>
        <groupId>net.sf.kxml</groupId>
        <artifactId>kxml2-min</artifactId>
        <version>2.3.0</version>
    </dependency>       
    <dependency>
        <groupId>xmlpull</groupId>
        <artifactId>xmlpull</artifactId>
        <version>1.1.3.1</version>
    </dependency>

XStreamGae类可以在这里找到：

http://www.wappworks.com/2011/11/11/using-xstream-with-google-app-engine/

是否有变通办法才能使此变通办法起作用？

Answer 1

显然，您的Car类应具有无参数构造函数：

public Car(){}