在Simple 2.5.3（Java）中反序列化重复的XML元素

假设给出了以下XML：

<?xml version="1.0" encoding="UTF-8"?>
<ResC>
    <Err text="Error text 1"/>
    <ConRes>
        <Err text="Error text 2"/>
        <ConList>
            <Err text="Error text 3"/>
            <Con>
                <Err text="Error text 4"/>
            </Con>
        </ConList>
    </ConRes>
</ResC>

但是，如何为

、

、

和

注释类？我真的必须在可能出现的每个类中声明类型为

的属性吗？这似乎是一个很大的开销。如果是这样，那么我必须检查每个对象是否包含错误

有更好更简单的方法吗？：-）

谢谢，

---

Robert

需要记住的重要一点是，简单的XML应该能够遵循使用类逻辑生成的任何结构。因此，您可以创建一个使用错误接口的基类，并应用Decorator模式，这样它就可以将所有这些都传递给一个具体的错误类，而不需要任何实现对象知道它们被赋予了什么

这可能毫无意义。让我向你们展示一下……好吧……我刚刚离开，实现了我的想法，结果如下（）：

主文件：

package com.massaiolir.simple.iface;

import java.io.File;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

public class Main {
    public static void main(String[] args) throws Exception {
        Serializer serial = new Persister();
        ResC resc = serial.read(ResC.class, new File("data/testdata.xml"));

        System.out.println(" == Printing out all of the error text. == ");
        System.out.println(resc.getErrorText());
        System.out.println(resc.conRes.getErrorText());
        System.out.println(resc.conRes.conList.getErrorText());
        for (Con con : resc.conRes.conList.cons) {
            System.out.println(con.getErrorText());
        }
        System.out.println(" == Finished printing out all of the error text. == ");
    }
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class BaseObject implements Error {
    @Element(name = "Err", required = false, type = ConcreteError.class)
    private Error err;

    @Override
    public String getErrorText() {
        return err.getErrorText();
    }

    @Override
    public void setErrorText(String errorText) {
        err.setErrorText(errorText);
    }
}

package com.massaiolir.simple.iface;

public interface Error {
    void setErrorText(String errorText);

    String getErrorText();
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Attribute;

public class ConcreteError implements Error {
    @Attribute
    private String text;

    @Override
    public String getErrorText() {
        return text;
    }

    @Override
    public void setErrorText(String errorText) {
        this.text = errorText;
    }

}

package com.massaiolir.simple.iface;

public class Con extends BaseObject {

}

package com.massaiolir.simple.iface;

import java.util.ArrayList;

import org.simpleframework.xml.ElementList;

public class ConList extends BaseObject {
    @ElementList(entry = "Con", inline = true)
    public ArrayList<Con> cons;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class ConRes extends BaseObject {
    @Element(name = "ConList")
    public ConList conList;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root
public class ResC extends BaseObject {
    @Element(name = "ConRes")
    public ConRes conRes;
}

它只是简单地运行并显示结果

BaseObject.java类：

package com.massaiolir.simple.iface;

import java.io.File;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

public class Main {
    public static void main(String[] args) throws Exception {
        Serializer serial = new Persister();
        ResC resc = serial.read(ResC.class, new File("data/testdata.xml"));

        System.out.println(" == Printing out all of the error text. == ");
        System.out.println(resc.getErrorText());
        System.out.println(resc.conRes.getErrorText());
        System.out.println(resc.conRes.conList.getErrorText());
        for (Con con : resc.conRes.conList.cons) {
            System.out.println(con.getErrorText());
        }
        System.out.println(" == Finished printing out all of the error text. == ");
    }
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class BaseObject implements Error {
    @Element(name = "Err", required = false, type = ConcreteError.class)
    private Error err;

    @Override
    public String getErrorText() {
        return err.getErrorText();
    }

    @Override
    public void setErrorText(String errorText) {
        err.setErrorText(errorText);
    }
}

package com.massaiolir.simple.iface;

public interface Error {
    void setErrorText(String errorText);

    String getErrorText();
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Attribute;

public class ConcreteError implements Error {
    @Attribute
    private String text;

    @Override
    public String getErrorText() {
        return text;
    }

    @Override
    public void setErrorText(String errorText) {
        this.text = errorText;
    }

}

package com.massaiolir.simple.iface;

public class Con extends BaseObject {

}

package com.massaiolir.simple.iface;

import java.util.ArrayList;

import org.simpleframework.xml.ElementList;

public class ConList extends BaseObject {
    @ElementList(entry = "Con", inline = true)
    public ArrayList<Con> cons;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class ConRes extends BaseObject {
    @Element(name = "ConList")
    public ConList conList;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root
public class ResC extends BaseObject {
    @Element(name = "ConRes")
    public ConRes conRes;
}

这是一个类，如果它想要“Err”，所有东西都应该扩展它

错误界面：

package com.massaiolir.simple.iface;

import java.io.File;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

public class Main {
    public static void main(String[] args) throws Exception {
        Serializer serial = new Persister();
        ResC resc = serial.read(ResC.class, new File("data/testdata.xml"));

        System.out.println(" == Printing out all of the error text. == ");
        System.out.println(resc.getErrorText());
        System.out.println(resc.conRes.getErrorText());
        System.out.println(resc.conRes.conList.getErrorText());
        for (Con con : resc.conRes.conList.cons) {
            System.out.println(con.getErrorText());
        }
        System.out.println(" == Finished printing out all of the error text. == ");
    }
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class BaseObject implements Error {
    @Element(name = "Err", required = false, type = ConcreteError.class)
    private Error err;

    @Override
    public String getErrorText() {
        return err.getErrorText();
    }

    @Override
    public void setErrorText(String errorText) {
        err.setErrorText(errorText);
    }
}

package com.massaiolir.simple.iface;

public interface Error {
    void setErrorText(String errorText);

    String getErrorText();
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Attribute;

public class ConcreteError implements Error {
    @Attribute
    private String text;

    @Override
    public String getErrorText() {
        return text;
    }

    @Override
    public void setErrorText(String errorText) {
        this.text = errorText;
    }

}

package com.massaiolir.simple.iface;

public class Con extends BaseObject {

}

package com.massaiolir.simple.iface;

import java.util.ArrayList;

import org.simpleframework.xml.ElementList;

public class ConList extends BaseObject {
    @ElementList(entry = "Con", inline = true)
    public ArrayList<Con> cons;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class ConRes extends BaseObject {
    @Element(name = "ConList")
    public ConList conList;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root
public class ResC extends BaseObject {
    @Element(name = "ConRes")
    public ConRes conRes;
}

具体错误类：

package com.massaiolir.simple.iface;

import java.io.File;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

public class Main {
    public static void main(String[] args) throws Exception {
        Serializer serial = new Persister();
        ResC resc = serial.read(ResC.class, new File("data/testdata.xml"));

        System.out.println(" == Printing out all of the error text. == ");
        System.out.println(resc.getErrorText());
        System.out.println(resc.conRes.getErrorText());
        System.out.println(resc.conRes.conList.getErrorText());
        for (Con con : resc.conRes.conList.cons) {
            System.out.println(con.getErrorText());
        }
        System.out.println(" == Finished printing out all of the error text. == ");
    }
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class BaseObject implements Error {
    @Element(name = "Err", required = false, type = ConcreteError.class)
    private Error err;

    @Override
    public String getErrorText() {
        return err.getErrorText();
    }

    @Override
    public void setErrorText(String errorText) {
        err.setErrorText(errorText);
    }
}

package com.massaiolir.simple.iface;

public interface Error {
    void setErrorText(String errorText);

    String getErrorText();
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Attribute;

public class ConcreteError implements Error {
    @Attribute
    private String text;

    @Override
    public String getErrorText() {
        return text;
    }

    @Override
    public void setErrorText(String errorText) {
        this.text = errorText;
    }

}

package com.massaiolir.simple.iface;

public class Con extends BaseObject {

}

package com.massaiolir.simple.iface;

import java.util.ArrayList;

import org.simpleframework.xml.ElementList;

public class ConList extends BaseObject {
    @ElementList(entry = "Con", inline = true)
    public ArrayList<Con> cons;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class ConRes extends BaseObject {
    @Element(name = "ConList")
    public ConList conList;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root
public class ResC extends BaseObject {
    @Element(name = "ConRes")
    public ConRes conRes;
}

实际的实现类在这一点之后。您将看到它们非常琐碎，因为真正的工作是在上面的类中处理的

Con类：

package com.massaiolir.simple.iface;

import java.io.File;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

public class Main {
    public static void main(String[] args) throws Exception {
        Serializer serial = new Persister();
        ResC resc = serial.read(ResC.class, new File("data/testdata.xml"));

        System.out.println(" == Printing out all of the error text. == ");
        System.out.println(resc.getErrorText());
        System.out.println(resc.conRes.getErrorText());
        System.out.println(resc.conRes.conList.getErrorText());
        for (Con con : resc.conRes.conList.cons) {
            System.out.println(con.getErrorText());
        }
        System.out.println(" == Finished printing out all of the error text. == ");
    }
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class BaseObject implements Error {
    @Element(name = "Err", required = false, type = ConcreteError.class)
    private Error err;

    @Override
    public String getErrorText() {
        return err.getErrorText();
    }

    @Override
    public void setErrorText(String errorText) {
        err.setErrorText(errorText);
    }
}

package com.massaiolir.simple.iface;

public interface Error {
    void setErrorText(String errorText);

    String getErrorText();
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Attribute;

public class ConcreteError implements Error {
    @Attribute
    private String text;

    @Override
    public String getErrorText() {
        return text;
    }

    @Override
    public void setErrorText(String errorText) {
        this.text = errorText;
    }

}

package com.massaiolir.simple.iface;

public class Con extends BaseObject {

}

package com.massaiolir.simple.iface;

import java.util.ArrayList;

import org.simpleframework.xml.ElementList;

public class ConList extends BaseObject {
    @ElementList(entry = "Con", inline = true)
    public ArrayList<Con> cons;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class ConRes extends BaseObject {
    @Element(name = "ConList")
    public ConList conList;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root
public class ResC extends BaseObject {
    @Element(name = "ConRes")
    public ConRes conRes;
}

ConList类：

package com.massaiolir.simple.iface;

import java.io.File;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

public class Main {
    public static void main(String[] args) throws Exception {
        Serializer serial = new Persister();
        ResC resc = serial.read(ResC.class, new File("data/testdata.xml"));

        System.out.println(" == Printing out all of the error text. == ");
        System.out.println(resc.getErrorText());
        System.out.println(resc.conRes.getErrorText());
        System.out.println(resc.conRes.conList.getErrorText());
        for (Con con : resc.conRes.conList.cons) {
            System.out.println(con.getErrorText());
        }
        System.out.println(" == Finished printing out all of the error text. == ");
    }
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class BaseObject implements Error {
    @Element(name = "Err", required = false, type = ConcreteError.class)
    private Error err;

    @Override
    public String getErrorText() {
        return err.getErrorText();
    }

    @Override
    public void setErrorText(String errorText) {
        err.setErrorText(errorText);
    }
}

package com.massaiolir.simple.iface;

public interface Error {
    void setErrorText(String errorText);

    String getErrorText();
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Attribute;

public class ConcreteError implements Error {
    @Attribute
    private String text;

    @Override
    public String getErrorText() {
        return text;
    }

    @Override
    public void setErrorText(String errorText) {
        this.text = errorText;
    }

}

package com.massaiolir.simple.iface;

public class Con extends BaseObject {

}

package com.massaiolir.simple.iface;

import java.util.ArrayList;

import org.simpleframework.xml.ElementList;

public class ConList extends BaseObject {
    @ElementList(entry = "Con", inline = true)
    public ArrayList<Con> cons;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class ConRes extends BaseObject {
    @Element(name = "ConList")
    public ConList conList;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root
public class ResC extends BaseObject {
    @Element(name = "ConRes")
    public ConRes conRes;
}

ResC类：

package com.massaiolir.simple.iface;

import java.io.File;

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

public class Main {
    public static void main(String[] args) throws Exception {
        Serializer serial = new Persister();
        ResC resc = serial.read(ResC.class, new File("data/testdata.xml"));

        System.out.println(" == Printing out all of the error text. == ");
        System.out.println(resc.getErrorText());
        System.out.println(resc.conRes.getErrorText());
        System.out.println(resc.conRes.conList.getErrorText());
        for (Con con : resc.conRes.conList.cons) {
            System.out.println(con.getErrorText());
        }
        System.out.println(" == Finished printing out all of the error text. == ");
    }
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class BaseObject implements Error {
    @Element(name = "Err", required = false, type = ConcreteError.class)
    private Error err;

    @Override
    public String getErrorText() {
        return err.getErrorText();
    }

    @Override
    public void setErrorText(String errorText) {
        err.setErrorText(errorText);
    }
}

package com.massaiolir.simple.iface;

public interface Error {
    void setErrorText(String errorText);

    String getErrorText();
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Attribute;

public class ConcreteError implements Error {
    @Attribute
    private String text;

    @Override
    public String getErrorText() {
        return text;
    }

    @Override
    public void setErrorText(String errorText) {
        this.text = errorText;
    }

}

package com.massaiolir.simple.iface;

public class Con extends BaseObject {

}

package com.massaiolir.simple.iface;

import java.util.ArrayList;

import org.simpleframework.xml.ElementList;

public class ConList extends BaseObject {
    @ElementList(entry = "Con", inline = true)
    public ArrayList<Con> cons;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;

public class ConRes extends BaseObject {
    @Element(name = "ConList")
    public ConList conList;
}

package com.massaiolir.simple.iface;

import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root
public class ResC extends BaseObject {
    @Element(name = "ConRes")
    public ConRes conRes;
}

---

这就是它的全部。很简单吧。我能在十分钟内把一切都搞定。实际上，我花了更长的时间来写这个响应，而不是我给你写的代码。如果你不理解我刚刚写的代码，请让我知道。我希望这有助于您理解如何进行类似的操作。

非常感谢您提供了这个代码示例。这正是我一直在寻找的：-）@Robert Strauch：没问题，希望它也能帮助其他人。