您可以使用Jackson来执行以下操作：
导入这些库：

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.11.1</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.dataformat</groupId>
    <artifactId>jackson-dataformat-xml</artifactId>
    <version>2.11.1</version>
</dependency>

然后在你的课堂上这样做：

public class Example {
        private String name;
        private int number;
    }
    Example example = new XmlMapper().readValue(xml, Example.class);
    String json = new ObjectMapper().writeValueAsString(example);