如何使用Simple XML序列化Map <String,String>？

   <groupId>org.simpleframework</groupId>
   <artifactId>simple-xml</artifactId>
   <version>2.7.1</version>
</dependency>

import org.simpleframework.xml.ElementMap;
import org.simpleframework.xml.Root;

import java.util.Map;

@Root
public class StringStringMap {

    @ElementMap(entry = "entry", key = "key", attribute = true, inline = true)
    private Map<String, String> map;

    public StringStringMap() {
    }

    public StringStringMap(Map<String, String> map) {
        this.map = map;
    }

    public Map<String, String> getMap() {
        return map;
    }

    public void setMap(Map<String, String> map) {
        this.map = map;
    }
}

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

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

public class Main {

    public static void main(String[] args) throws Exception {
        // 创建一个Map并添加一些数据
        Map<String, String> map = new HashMap<>();
        map.put("key1", "value1");
        map.put("key2", "value2");
        map.put("key3", "value3");

        // 将Map包装在StringStringMap对象中
        StringStringMap stringStringMap = new StringStringMap(map);

        // 创建一个序列化器
        Serializer serializer = new Persister();

        // 将对象序列化为XML文件
        serializer.write(stringStringMap, new File("map.xml"));

        // 从XML文件反序列化对象
        StringStringMap deserializedMap = serializer.read(StringStringMap.class, new File("map.xml"));

        // 输出反序列化后的Map
        System.out.println(deserializedMap.getMap());
    }
}