比如以下XML文件配置的内容，可以由以下类相应的具体实例来表达
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xsi="http://www.w3.org/2001/XMLSchema-instance"
schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<groupId>com.dslztx</groupId>
<artifactId>parent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
</project>>
class Equivalent {
String xmlns;
String xsi;
String schemaLocation;
Parent parent;
}
class Parent {
String groupId;
String artifactId;
String version;
}
public class Main {
public static void main(String[] args) {
Equivalent equivalent = new Equivalent();
equivalent.xmlns = "http://maven.apache.org/POM/4.0.0";
equivalent.xsi = "http://www.w3.org/2001/XMLSchema-instance";
equivalent.schemaLocation = "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd";
Parent parent = new Parent();
parent.groupId = "com.dslztx";
parent.artifactId = "parent";
parent.version = "1.0-SNAPSHOT";
equivalent.parent = parent;
}
}
有些XML文件引入XSD文件来限定XML文件中能够配置的内容，那么获取XML文件的等价类可以通过分析XSD文件得到