1. 引入pom依赖
<dependency><groupId>org.dom4j</groupId><artifactId>dom4j</artifactId><version>2.1.3</version>
</dependency>2. 解析xml, 修改xml节点的值
import org.apache.commons.io.IOUtils;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.List;public class Dom4jParseUserXmlTest { //业务数据xml格式public static String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +"<DATA>\n" +" <HEAD>\n" +" <BIZID>AD03-1713863079</BIZID>\n" +" <COUNT>1</COUNT>\n" +" <CONSUMER>app</CONSUMER>\n" +" </HEAD>\n" +" <BODY>\n" +" <ITEM>\n" +" <CUST_NAME>张三</CUST_NAME>\n" +" <CUST_SEX>0</CUST_SEX>\n" +" <CUST_MOBILE>17812345678</CUST_MOBILE>\n" +" </ITEM>\n" +" </BODY>\n" +"</DATA>";public static void main(String[] args) { //创建解析器对象SAXReader saxReader=new SAXReader();try { InputStream inputStream = IOUtils.toInputStream(new String(xml), StandardCharsets.UTF_8.name()); Document document = saxReader.read(inputStream);Element rootElement = document.getRootElement();System.out.println("1.------->root:"+rootElement.getName());System.out.println("2.------->获取root子标签列表");List<Element> usersSubElementList = rootElement.elements();for (Element userElement : usersSubElementList) { System.out.println("DATA标签的子标签的名字是"+ userElement.getName());System.out.println("3.------->获取"+ userElement.getName() +"的子标签列表");List<Element> userSubElementList = userElement.elements();for (Element userSubElement : userSubElementList) { if("BIZID".equals(userSubElement.getName())) {//修改节点值userSubElement.setText("111111111111111111111111111");}System.out.println("标签下的子标签名为:"+userSubElement.getName());System.out.println("标签下的子标签文本是:"+userSubElement.getText());}}
// //获取users标签的第一个标签
// Element firstUserElement = rootElement.element("user");
// //第一个user标签的子标签password的文本内容
// String password = firstUserElement.attributeValue("password");
// System.out.println(password);} catch (DocumentException e) { e.printStackTrace();}}
}3. 换个思路, XML转json, 然后解析json
3.1 用 Jackson 库
Jackson 是一个强大的 JSON 处理库，它也支持 XML 到 JSON 的转换。
-
添加 Jackson 依赖（Maven）：
<dependency><groupId>com.fasterxml.jackson.dataformat</groupId><artifactId>jackson-dataformat-xml</artifactId><version>2.15.0</version> </dependency> <dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.15.0</version> </dependency> -
实现代码：
import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.dataformat.xml.XmlMapper;public class XmlToJsonConverter {public static String convertXmlToJson(String xml) throws Exception {// 创建 XmlMapper 实例XmlMapper xmlMapper = new XmlMapper();// 将 XML 字符串解析为 JsonNodeJsonNode node = xmlMapper.readTree(xml.getBytes());// 创建 ObjectMapper 实例ObjectMapper jsonMapper = new ObjectMapper();// 将 JsonNode 转换为 JSON 字符串return jsonMapper.writerWithDefaultPrettyPrinter().writeValueAsString(node);}public static void main(String[] args) {String xml = "<person><name>John Doe</name><age>30</age></person>";try {String json = convertXmlToJson(xml);System.out.println("JSON Output:\n" + json);} catch (Exception e) {e.printStackTrace();}} }
输出：
{"person" : {"name" : "John Doe","age" : "30"}
}
3.2 使用 org.json 库
<dependency><groupId>org.json</groupId><artifactId>json</artifactId><version>20231013</version>
</dependency>代码
// 示例XML字符串String xmlString= "<person><name>John Doe</name><age>30</age></person>";// 将XML转换为JSONJSONObject jsonObject = XML.toJSONObject(xmlString);String jsonString = jsonObject.toString(4); // 4是缩进空格数，用于美化输出System.out.println(jsonString);
