Java SimpleXML 使用类属性填充内部对象答案

【问题标题】：Java SimpleXML populates inner object with class attributeJava SimpleXML 使用类属性填充内部对象
【发布时间】：2019-06-24 19:35:41
【问题描述】：

我是 Simple XML 的新手，但我遇到了内部元素中不需要的对象填充的问题。

实际的问题是我想要这个层次结构：

<Request>
    <SpecificRequest>
         <UniqueID></UniqueID>
             or
         <Password></Password>
    </SpecificRequest>
</Request>

但是有这个：

<Request>
     <SpecificRequest>
        <mData class="com.example.package.UIDData">
           <UniqueID>6252859A</UniqueID>
        </mData>
     </SpecificRequest >
</Request>

类如下所示：

根请求对象：

@Root(name = "Request")
public class Request {
    @Element(name = "SpecificRequest")
    private SpecificRequest mSpecificRequest;

    public Request(SpecificRequest specificRequest) {
        mSpecificRequest = specificRequest;
    }
}

具体请求对象：

public class SpecificRequest {
    private Data mData;

    public SpecificRequest(Data data) {
        mData = data;
    }
}

通用数据类：

public abstract class Data {
    private Type mType = Type.None;

    protected Data(Type type) {
        mType = type;
    }

    // other abstract stuff
}

以及具体的数据类：

public class UIDData extends Data {
    @Element(name = "UniqueID")
    private String mUID;

    public UIDData(String UID) {
        super(Type.UID);
        mUID = UID;
    }
}

附：这不是this 或this 的重复。

【问题讨论】：

标签： java android xml simple-framework

【解决方案1】：

在 SimpleXml @Element 注释中添加 UIDData.class 作为类型

public class TestClass {

private String getXmlBody(Object o, Matcher matcher) throws Exception {
        Format format = new Format(4, "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>");
        Serializer serializer = new Persister(new AnnotationStrategy(), matcher, format);
        Writer writer = new StringWriter();
        serializer.write(o, writer);
        writer.write('\n');
        return writer.toString();
    }    
 public static void main(String[] args) throws Exception {
 Data data = new UIDData("some UUID value ");
 SpecificRequest specificRequest  =  new SpecificRequest(data);
 Request request = new Request(specificRequest);
 System.out.println(getXmlBody(request, new RegistryMatcher()));
        }
    }
    @Root(name = "Request")
    class Request {
        @Element(name = "SpecificRequest")
        private SpecificRequest mSpecificRequest;

        public Request(SpecificRequest specificRequest) {
            mSpecificRequest = specificRequest;
        }
    }
    class SpecificRequest {
     @Element(type = UIDData.class)
        private Data mData;

        public SpecificRequest(Data data) {
            mData = data;
        }
    }

    abstract class Data {
        private String mType = "";

        protected Data(String type) {
            mType = type;
        }

        // other abstract stuff
    }

    class UIDData extends Data {
        @Element(name = "UniqueID")
        private String mUID;

        public UIDData(String UID) {
            super("UID");
            mUID = UID;
        }
    }

【讨论】：