通过 JAXB 将 xml 转换为 java 对象

Question

我有以下带有 measurement 部分的 xml，我想将其转换为 java 对象。但我对本节设计 POJO 的对象有疑问。你能帮我吗？谢谢

<root_element>
   <element>some_value</element>
   <element>some_value</element>     // SOME OTHERS ELEMENT'S
   <element>some_value</element>
   <measurement>                     // BEGINING OF THE SECTION WHERE I HAVE A PROBLEM
       <component>SO2</component>
       <averaged_time>
            <averaged_hours>1</averaged_hours>
            <value>9.054</value>
       </averaged_time>
       <component>NO2</component>
       <averaged_time>
            <averaged_hours>1</averaged_hours>
            <value>14.155</value>
       </averaged_time>
   </measurement>                    // END OF THE SECTION WHERE I HAVE A PROBLEM
   <element>some_value</element>
</root_element>

我有这样的东西（我没有在这里写其他参数，那些工作没有问题）。 JAXB 在Measurement 中返回我最后一个“组件”和“averaged_time”元素。我知道ArrayList <Measurement> 是不好的方法。

@XmlRootElement
public class root_element {

      private ArrayList<Measurement> measurements;

      public ArrayList<Measurement> getMeasurements() {
            return measurements;
      }

      @XmlElement (name = "measurement")
      public void setMeasurement(ArrayList<Measurement> measurements) {
            this.measurements = measurements;
      }
}

测量对象

public class Measurement {

    private String component;
    private AveragedTime averagedTime;  

    public String getComponent() {
        return component;
    }

    @XmlElement (name = "component")
    public void setComponent(String component) {
        this.component = component;
    }

    public AveragedTime getAveragedTime() {
        return averagedTime;
    }

    @XmlElement (name = "averaged_time")
    public void setAveragedTime(AveragedTime averagedTime) {
        this.averagedTime = averagedTime;
    }
}

平均时间对象

public class AveragedTime {

        private int averaged_hours;
        private double value;

        public int getAveraged_hours() {
            return averaged_hours;
        }

        @XmlElement (name = "averaged_hours")
        public void setAveraged_hours(int averaged_hours) {
            this.averaged_hours = averaged_hours;
        }

        public double getValue() {
            return value;
        }

        @XmlElement (name = "value")
        public void setValue(double value) {
            this.value = value;
        }

Answer 1

我看到的XML问题，应该是

<root_element>
   <element>some_value</element>
   <element>some_value</element>     // SOME OTHERS ELEMENT'S
   <element>some_value</element>
   <measurement>                     // BEGINING OF THE SECTION WHERE I HAVE A PROBLEM
       <component>SO2</component>
       <averaged_time>
            <averaged_hours>1</averaged_hours>
            <value>9.054</value>
       </averaged_time>
   </measurement>
   <measurement>   
       <component>NO2</component>
       <averaged_time>
            <averaged_hours>1</averaged_hours>
            <value>14.155</value>
       </averaged_time>
   </measurement>                    // END OF THE SECTION WHERE I HAVE A PROBLEM
   <element>some_value</element>
</root_element>

让你所有的 POJO 看起来都很好，即按照上面建议的 xml 同步。

否则，如果您需要继续使用现有的 XML，请按如下方式更改您的类：

@XmlRootElement
public class root_element {

      private Measurement measurements;

     //getter-setters
}

测量类

public class Measurement {

    private List<String> component;
    private List<AveragedTime> averagedTime;  

    //getter-setters

 }

休息一切似乎都很好。