解析这样的XML 需要怎么做

Question

 <?xml version="1.0" encoding="UTF-8"?>
<!-- 根目录 -->
<ResNursingOrderBean>
<code>1</code>
<message>获取数据成功</message>
<totalScore>分数</totalScore> 
<!-- 外层list对象 -->
    <NursedList > 
        <projectId >1</projectId> 
        <projectName>教育程度</projectName>
        <projectMark>0</projectMark>
        <projectType>1</projectType>
        <!-- 内层List对象 -->
            <OptionList id="选项答案">
                <optionId >B</optionId>
                <optionName>中专</optionName>
                <optionMark>0</optionMark>
            </OptionList>
            <OptionList id="选项答案">
                <optionId >C</optionId>
                <optionName>大专</optionName>
                <optionMark>0</optionMark>
            </OptionList>
    </NursedList>  
    <NursedList >
        <projectId >1</projectId>  
        <projectName>入院方式</projectName>
        <projectMark>0</projectMark>
        <projectType>1</projectType>
            <OptionList id="选项答案">
                <optionId >A</optionId>
                <optionName>步行</optionName>
                <optionMark>0</optionMark>
            </OptionList>
            <OptionList id="选项答案">
                <optionId >B</optionId>
                <optionName>轮椅</optionName>
                <optionMark>0</optionMark>
            </OptionList>
    </NursedList>   
</ResNursingOrderBean>  

Answer 1

给父节点元素中加id标识