Java 如何使用 FasterXML 反序列化带有注释的 XML
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How to deserialize XML with annotations using FasterXML
提问by sbenderli
I have the following XML schema:
我有以下 XML 架构：
<Courses semester="1">
<Course code="A231" credits="3">Intermediate A</Course>
<Course code="A105" credits="2">Intro to A</Course>
<Course code="B358" credits="4">Advanced B</Course>
</Courses>
I need to convert this into POJO as:
我需要将其转换为 POJO：
public class Schedule
{
public int semester;
public Course[] courses;
}
public class Course
{
public String code;
public int credits;
public String name;
}
There are two important things to note here:
这里有两件重要的事情需要注意：
- The courses object are not wrapped in a tag
- Some of the properties are attributes
- 课程对象未包装在标签中
- 一些属性是属性
How do I need to annotate my objects to get FasterXML to deserialize this xml?
我需要如何注释我的对象才能让 FasterXML 反序列化这个 xml？
回答by Micha? Ziober
You have to add Hymanson-dataformat-xmldependency to your project:
您必须向Hymanson-dataformat-xml项目添加依赖项：
<dependency>
<groupId>com.fasterxml.Hymanson.dataformat</groupId>
<artifactId>Hymanson-dataformat-xml</artifactId>
<version>2.3.3</version>
</dependency>
After that you can use XML annotations in this way:
之后，您可以以这种方式使用 XML 注释：
@HymansonXmlRootElement(localName = "Courses")
class Schedule {
@HymansonXmlProperty(isAttribute = true)
private int semester;
@HymansonXmlProperty(localName = "Course")
private Course[] courses;
// getters, setters, toString, etc
}
class Course {
@HymansonXmlProperty(isAttribute = true)
private String code;
@HymansonXmlProperty(isAttribute = true)
private int credits;
@HymansonXmlText(value = true)
private String name;
// getters, setters, toString, etc
}
Now, you have to use XmlMapperinstead of ObjectMapper:
现在，您必须使用XmlMapper代替ObjectMapper：
HymansonXmlModule module = new HymansonXmlModule();
module.setDefaultUseWrapper(false);
XmlMapper xmlMapper = new XmlMapper(module);
System.out.println(xmlMapper.readValue(xml, Schedule.class));
Above script prints:
以上脚本打印：
Schedule [semester=1, courses=[[code=A231, credits=3, name=Intermediate A], [code=A105, credits=2, name=Intro to A], [code=B358, credits=4, name=Advanced B]]]
