java - @XmlElement 是否可以使用非标准名称注释方法？

Question

这就是我正在做的:

@XmlType(name = "foo")
@XmlAccessorType(XmlAccessType.NONE)
public final class Foo {
  @XmlElement(name = "title")
  public String title() {
    return "hello, world!";
  }
}

JAXB 提示:

com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 2 counts of IllegalAnnotationExceptions
JAXB annotation is placed on a method that is not a JAXB property
    this problem is related to the following location:
        at @javax.xml.bind.annotation.XmlElement(nillable=false, name=title, required=false, defaultValue=, type=class javax.xml.bind.annotation.XmlElement$DEFAULT, namespace=##default)
        at com.example.Foo

要做什么？我不想(也不能)重命名该方法。

Answer 1

有几个不同的选项:

选项 #1 - 引入字段

如果该值像您的示例中那样是常量，那么您可以将一个字段引入您的领域类，并让 JAXB 映射到该字段:

import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlType;

@XmlType(name = "foo")
@XmlAccessorType(XmlAccessType.NONE)
public final class Foo {
    @XmlElement
    private final String title = "hello, world!";

  public String title() {
    return title;
  }
}

选项 #2 - 引入属性

如果计算值，则需要引入 JavaBean 访问器并将 JAXB 映射到该访问器:

import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlType;

@XmlType(name = "foo")
@XmlAccessorType(XmlAccessType.NONE)
public final class Foo {

  public String title() {
    return "hello, world!";
  }

  @XmlElement
  public String getTitle() {
      return title();
  }

}