java xml转json

你可以使用现成的Java库来将XML数据转换为JSON格式。以下是使用Jackson库的示例代码：

1. 添加Jackson依赖

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.12.0</version>
</dependency>

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.0</version>
</dependency>

2. 编写转换代码

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;

public class XmlToJsonConverter {

    public static void main(String[] args) throws Exception {
        String xml = "<root><name>John</name><age>30</age></root>";

        // Create ObjectMapper instances for XML and JSON
        XmlMapper xmlMapper = new XmlMapper();
        ObjectMapper jsonMapper = new ObjectMapper();

        // Convert XML to JSON
        JsonNode jsonNode = xmlMapper.readTree(xml);
        ObjectNode objectNode = jsonMapper.createObjectNode();
        objectNode.setAll((ObjectNode) jsonNode);

        // Print JSON output
        System.out.println(objectNode.toString());
    }
}

此代码将XML字符串转换为JSON字符串，并将其打印到控制台。你可以根据你的需求对输出进行处理。