使用 xstream 反序列化具有重复条目的 xml [英] Deserializing xml with duplicate entries using xstream

问题描述

我试图读入一个 xml 文件并将其内容存储为一个对象以供以后使用.我可以使用 toXML() 方法重现一个类似的对象并提供示例数据，但是当我在同一个对象上调用 fromXML() 时，我得到一个错误.问题是我有多个字段实例.xml 看起来像这样...

I am trying to read in an xml file and store its contents as an object for later use. I can reproduce a similar object using the toXML() method and providing sample data however when I call fromXML() on the same object I get an error. The problem is I have multiple instances of fiels. The xml looks something like this...

<House>   
  <Address>
    <Number>1234</Number>
    <Street>Sample St.</Street>
    <City>Sample City</City>
  </Address>
  <Resident>
    <Name>Joe</Name>
    <Age>38</Age>
    <Profession>
      <Title>Engineer</Title>
      <Title>Developer</Title>
    </Profession>
  </Resident>
  <Resident>
    <Name>Cathy</Name>
    <Age>35</Age>
    <Profession>
      <Title>Engineer</Title>
      <Title>Developer</Title>
    </Profession>
  </Resident>
</House>

所以在这个例子中，有两个居民，他们每个人都有两个职位.我尝试将这些标签定义为它们各自类的构造函数中的数组列表，但这似乎不起作用.如果我只有一个 Resident 或 Title 等实例，这很好用.

So in this example there are two residents and they each have two job titles. I tried defining these tags as arraylists in the constructors' for their respective classes but that didn't seem to work. This works fine if I only have one instance of Resident or Title etc.

这是Java代码(从下面的评论中复制):

Here is the Java code (copied from comment below):

XStream xstream = new XStream(new DomDriver()); 
FileReader fin = new FileReader("path_to_file.xml"); 
BufferedReader br = new BufferedReader(fin); 

while(br.ready())
{ 
  str += br.readLine() + "\n"; 
} 

House house = (House)xstream.fromXML(str);


import java.util.ArrayList;


public class House {

private Address Address;
private ArrayList<Resident> Resident;

public House(Address address, ArrayList<Resident> resident) {

    Address = address;
    Resident = resident;
}

public Address getAddress() {
    return Address;
}

public void setAddress(Address address) {
    Address = address;
}

public ArrayList<Resident> getResident() {
    return Resident;
}

public void setResident(ArrayList<Resident> resident) {
    Resident = resident;
}

}

推荐答案

这里是使用注解的方法.

Here is how to do it using annotations.

@XStreamAlias("house")
public class House{

@XStreamAlias("Address")
private String address;

@XStreamImplicit
protected List<Resident> residents;

    ...

}

在常驻班上，您会这样做:

And at the Resident class you do:

@XStreamAlias("resident")
public class Resident{

@XStreamAlias("name")
private String name;

@XStreamAlias("age")
private int age;

@XStreamAlias("profession")
private String profession;


@XStreamImplicit
protected List<String> titles

    ...

}

记得处理注释.

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