如果我不想将某些变量编组到XML文件中怎么办？ [英] What if I do not want some variables to be marshalled into XML file?

问题描述

package jaxb.classes;

import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)
public class Task {
    @XmlElement(name="input")
    private String input;   // String representing the input file
    @XmlElement(name="output")
    private String output; // String representing the output file
    @XmlElement(name="format")
    private Format format; // a jaxb.classes.Format representing the format of conversion
    @XmlElement(name="taskID")
    private long taskID; // a unique ID for each task.
    @XmlElement(name="isReady")
    public boolean isReady; // boolean value representing whether the task is ready for conversion


    public boolean isChanging; // boolean representing if the user is changing the task DO NOT MARSHALL
    public boolean isExecuting; // boolean representing whether the task is being executed  DO NOT MARSHALL

    public long getTaskID(){
        return taskID;
    }

    public String getInput(){
        return input;
    }

    public String getOutput(){
        return output;
    }

    public Format getFormat(){
        return format;
    }

    public void setOutput(String out){
        output = out;
    }

    public void setFormat(Format f){
        format = f;
    }

}  

所以，这是一个类表示转换的待处理任务。这将转换为包含已保存数据的XML。

但是，我不希望 isChanging ， isExecuting 将被制作成XML。当他们被回读时，我希望它们是 false 。

So, here is a class that represents the pending tasks for conversion. This will be converted into XML which will contain the saved data.
However, I do not want isChanging, isExecuting to be made into XML. I want them to be false when they are read back.

我该怎么做？

推荐答案

有几种方法可以支持此用例：

There are a couple of ways to support this use case:

选项＃1 - @XmlTransient

Option #1 - @XmlTransient

您可以使用 @XmlTransient 注释来防止字段/属性被编组或者是unmarshalled。

You can use the @XmlTransient annotation to prevent a field/property from being marshalled or unmarshalled.

选项＃2 - @XmlAccessorType（XmlAccessType.NONE）

Option #2 - @XmlAccessorType(XmlAccessType.NONE)

您可以使用 @XmlAccessorType（XmlAccessType.NONE）对类进行批注，以便仅对带注释的字段/属性进行编组/ unmarshalled。

You can annotated the class with @XmlAccessorType(XmlAccessType.NONE) so that only annotated fields/properties will be marshalled/unmarshalled.

更多信息

• http://blog.bdoughan.com/2012/04/jaxb -and-unmapped-properties.html

• http://blog.bdoughan.com/2012/04/jaxb-and-unmapped-properties.html

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