代码生成- XML到Java

<person>
    <name>John Doe</name>
    <age>30</age>
</person>

public class Person {
    private String name;
    private int age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;

import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;

public class CodeGenerator {
    public static void main(String[] args) {
        VelocityEngine ve = new VelocityEngine();
        ve.init();

        Template t = ve.getTemplate("person.vm");

        Map<String, Object> context = new HashMap<>();
        context.put("name", "John Doe");
        context.put("age", 30);

        StringWriter writer = new StringWriter();
        t.merge(context, writer);

        System.out.println(writer.toString());
    }
}

public class Person {
    private String name;
    private int age;

    public String getName() {
        return $name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return $age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}