如何使用 Java 从 XML 读取值并将其保存在 Hashmap 中 [英] How can I read values from XML and save it in Hashmap using Java
问题描述
我是 XML 解析的新手,我尝试检索 XML 之后的数据并将其保存在哈希图中.我希望将每个字段的描述、ID 和名称保存在 Hashmap 中.
I'm new to XML parsing, I trying to retrieve data following XML n save it in hashmap. I want Description, id and name from each Fields to be saved in Hashmap.
<Entities TotalResults="13689">
<Entity Type="test">
<Fields>
<Field Name="description">
<Value>I want to print THIS</Value>
</Field>
<Field Name="id"><Value>1357</Value></Field>
<Field Name="vc-comments"><Value></Value></Field>
<Field Name="name">
<Value>locked manager - lock state</Value>
</Field>
<Field Name="has-linkage"><Value>N</Value></Field>
</Fields>
</Entity>
<Entity Type="test">
<Fields>
<Field Name="description"><Value>Print this</Value></Field>
<Field Name="user-06"><Value></Value></Field>
<Field Name="id"><Value>1358</Value></Field>
<Field Name="name">
<Value>locked manager - stealing a key </Value>
</Field>
<Field Name="vc-status"><Value></Value></Field>
</Fields>
</Entity>
</Entities>
推荐答案
当你不知道字段时应该使用hash map
You should use hash map when you dont know the fields
解决问题的仪式方式是构建一个 pojo 类像这样
The rite way for you problem is to build a pojo class like this
public class MyPojo
{
private Entities Entities;
public Entities getEntities ()
{
return Entities;
}
public void setEntities (Entities Entities)
{
this.Entities = Entities;
}
@Override
public String toString()
{
return "ClassPojo [Entities = "+Entities+"]";
}
}
public class Entities
{
private String TotalResults;
private Entity[] Entity;//you can use List<> insted
public String getTotalResults ()
{
return TotalResults;
}
public void setTotalResults (String TotalResults)
{
this.TotalResults = TotalResults;
}
public Entity[] getEntity ()
{
return Entity;
}
public void setEntity (Entity[] Entity)
{
this.Entity = Entity;
}
@Override
public String toString()
{
return "ClassPojo [TotalResults = "+TotalResults+", Entity = "+Entity+"]";
}
}
我制作了 2 个 pojos 以便您更好地理解
I have made 2 pojos for your better understanding
您可以创建与 xml 相关的其余部分.以后你就可以用
you can create the rest as related to xml. Later you can just use
File file = new File("My.xml");
JAXBContext jaxbContext = JAXBContext.newInstance(MyPojo.class);
Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
MyPojo myPojo = (MyPojo) jaxbUnmarshaller.unmarshal(file);
System.out.println(myPojo);//get your value with getter setter.
//Description, id, name 可以检索.
//Description, id and name can be retrieved.
一般来说,你使用一个集合(List、Map、Set)来存储对象具有相似特征,这就是泛型存在的原因.
In general, you use a Collection (List, Map, Set) to store objects with similar characteristics, that's why generics exist.
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