SimpleXML Android Error ValueRequiredException

时间：2014-09-11 09:31:44

标签： java android simple-framework

我正在整合SimpleXml反序列化，但每次都有异常。不知道究竟是什么原因。请查看此问题下提供的详细信息。提前谢谢。

以下是模型类 。 

import java.util.ArrayList;

import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Root;

@Root(name = "images")
public class ImagesModel {

    @ElementList(name="image")
    private ArrayList<ImageClass> imgList = new ArrayList<ImageClass>();

    public ArrayList<ImageClass> getImageList(){
        return imgList;
    }
}


import java.util.ArrayList;

import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;
import org.simpleframework.xml.ElementList;

@Element(name = "image")
public class ImageClass {
        @Attribute(name = "name")
        private String imageName;

        public String getImageName(){
            return imageName;
        }

        public ImageClass(String imageName) {
            this.imageName = imageName;
        }

        @ElementList(name="ver")
        private ArrayList<Version> versions = new ArrayList<Version>();

        public ArrayList<Version> getVersionsList(){
            return versions;
        }
    }

import org.simpleframework.xml.Attribute;
import org.simpleframework.xml.Element;

@Element(name = "diff")
public class PixelDetail{
        @Attribute(name = "x")
        private String x;

        public String getX(){
            return x;
        }

        @Attribute(name = "x")
        private String y;

        public String getY(){
            return y;
        }

        public PixelDetail(String x, String y) {
            this.x = x;
            this.y = y;
        }
    }

import java.util.ArrayList;

import org.simpleframework.xml.Element;
import org.simpleframework.xml.ElementList;

@Element(name = "version")
public class Version{
        @ElementList(name="diff")
        private ArrayList<PixelDetail> pixelsData = new ArrayList<PixelDetail>(); 

        public ArrayList<PixelDetail> getPixelsList(){
            return pixelsData;
        }
    }

XML结构 

<images>

    <image name="Org1" >
        <version>
            <ver>
                <diff
                    x="79"
                    y="19" />

                <diff
                    x="215"
                    y="73" />

                <diff
                    x="68"
                    y="202" />

                <diff
                    x="96"
                    y="289" />

                <diff
                    x="173"
                    y="164" />
            </ver>

            <ver>
                <diff
                    x="14 "
                    y="93 " />

                <diff
                    x="57 "
                    y="46 " />

                <diff
                    x=" 192"
                    y="17" />

                <diff
                    x="180 "
                    y="139" />

                <diff
                    x="135 "
                    y="242 " />
            </ver>

            <ver>
                <diff
                    x="286 "
                    y="123" />

                <diff
                    x="31"
                    y="292" />

                <diff
                    x="170"
                    y="216" />

                <diff
                    x="189"
                    y="234" />

                <diff
                    x="131 "
                    y="286" />
            </ver>
        </version>
    </image>
    <image name="Org2" >
        <version>
            <ver>
                <diff
                    x="197"
                    y="41" />

                <diff
                    x="269"
                    y="162" />

                <diff
                    x="297"
                    y="19" />

                <diff
                    x="4"
                    y="52" />

                <diff
                    x="178"
                    y="284" />
            </ver>

            <ver>
                <diff
                    x="213"
                    y="59" />

                <diff
                    x="208"
                    y="97" />

                <diff
                    x="284"
                    y="162" />

                <diff
                    x="193"
                    y="138" />

                <diff
                    x="5"
                    y="221" />
            </ver>

            <ver>
                <diff
                    x="219"
                    y="97" />

                <diff
                    x="40"
                    y="44" />

                <diff
                    x="67"
                    y="21" />

                <diff
                    x="181"
                    y="37" />

                <diff
                    x="208"
                    y="172" />
            </ver>
        </version>
    </image>
</images>

记录Cat错误 

09-11 14:52:55.926: W/System.err(5525): org.simpleframework.xml.core.ValueRequiredException: Unable to satisfy @org.simpleframework.xml.Attribute(empty=, name=name, required=true) on field 'imageName' private java.lang.String com.wavinno.iotasol.spotdifference.models.ImageClass.imageName for class com.wavinno.iotasol.spotdifference.models.ImageClass at line 5

1 个答案:

答案 0 :(得分：0)

以下是一些可以做的事情：

正确注释

课程应使用@Root而不是@Element。

使用内联列表

这将为列表添加额外的image元素：

@ElementList(name="image")  
private ArrayList<ImageClass> imgList = new ArrayList<ImageClass>();
像这样：

<images>
   <image>
      <image name="abc">
         <!-- ... -->
      </image>
   </image>
</images>

因此image - 元素的属性（第一个被使用！）不可用。添加inline = true代替使用内联列表。

未构建版本元素

与上面的xml一样，没有version - 元素。

重复注释

类x的{​​{1}}和y的注释使用相同的名称：

PixelDetail

复制＆amp;粘贴错字？ ; - ）

默认构造函数

对于（反）序列化，每个类都需要具有默认构造函数。可见性并不重要，即使是私人也是如此。

您可以在此处查看固定代码：

班级 @Attribute(name = "x") private String x; @Attribute(name = "x") /* ! */ private String y; 

ImageClass

班级@Root(name = "image") public class ImageClass { @Attribute(name = "name") private String imageName; public String getImageName() { return imageName; } public ImageClass(String imageName) { this.imageName = imageName; } ImageClass() { } @ElementList(name = "version") private ArrayList<Version> versions = new ArrayList<Version>(); public ArrayList<Version> getVersionsList() { return versions; } } 

ImagesModel

班级@Root(name = "images") public class ImagesModel { @ElementList(name = "image", inline = true) private ArrayList<ImageClass> imgList = new ArrayList<ImageClass>(); public ArrayList<ImageClass> getImageList() { return imgList; } } 

PixelDetail

班级@Root(name = "diff") public class PixelDetail { @Attribute(name = "x") private String x; public String getX() { return x; } @Attribute(name = "y") private String y; public String getY() { return y; } public PixelDetail(String x, String y) { this.x = x; this.y = y; } PixelDetail() { } } 

Version
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