xml和Bean相互转换

雨点打透心脏的1/2处 2024-03-31 11:18 64阅读 0赞

### 1.引入包 ###

<dependency> 
        <groupId>com.thoughtworks.xstream</groupId> 
        <artifactId>xstream</artifactId> 
        <version>1.4.9</version> 
    </dependency>
    <dependency>
       <groupId>dom4j</groupId>
       <artifactId>dom4j</artifactId>
       <version>1.6.1</version>
    </dependency>

### 2.Java代码 ###

import com.thoughtworks.xstream.XStream;
    import org.dom4j.Document;
    import org.dom4j.DocumentHelper;
    
    /**
     * XML工具类
     */
    public class XmlUtil {
     private static XStream xStream = new XStream();
     /**
     * 解析xml
     * @param xml xml字符串
     * @param elementName 要解析的父标签
     * @param cls 目标类型
     * @return 解析结果
     */
     public static <T> T xmlToBean(String xml, String elementName, Class<T> cls) {
     T object = null;
     try {
     Document document = DocumentHelper.parseText(xml);
     //如果不是SOAP返回的报文，是XML字符串则不需要这行代码
     String beanXml = document.getRootElement().element("Body").element(
     elementName).asXML();
     xStream.alias(elementName, cls);
     object = (T) xStream.fromXML(beanXml);
     } catch (Exception e) {
     e.printStackTrace();
     }
     return object;
     }
    
     /**
     * 转换XML
     * 对象添加 @XStreamAlias("标签名称")
     * 集合添加 @XStreamImplicit(itemFieldName="标签名称")
     * 否则会出现解析的xml中标签带类全称现象
     * @param object 要转换的对象
     * @return 结果字符串
     */
     public static String beanToXml(Object object) {
     xStream.processAnnotations(object.getClass()); // 应用注解
     xStream.autodetectAnnotations(true); //自动检测注解
     return xStream.toXML(object);
     }
    }

### 3.验证 ###

public static void main(String[] args) {
        String json ="";
        List<T> packages =  new ArrayList<T>();
        packages = JSONObject.parseObject(json,new TypeReference<List<T>>() {});
        xStream.alias("res", List.class);
        String xml = XmlUtil.beanToXml(packages);
        System.out.println("xml:"+xml);
    }