使用Marshaller 将Java对象转化为XML格式和字符串转为xml

使用Marshaller 将Java对象转化为XML格式

1. 对象转xml内容
   ①工具类

   public static String convertObjectToXml(Object obj) throws Exception {StringWriter writer = new StringWriter();// 创建 JAXBContext 和 MarshallerJAXBContext context = JAXBContext.newInstance(obj.getClass());Marshaller marshaller = context.createMarshaller();// 设置 Marshaller 属性// 指定是否使用换行和缩排对已编组 XML 数据进行格式化的属性名称marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);// 指定是否带有xml报文头marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");// 将 Java 对象转换成 XML 标签marshaller.marshal(obj, writer);return writer.toString();
   }
   

   ②嵌套对象

   import javax.xml.bind.annotation.XmlAccessType;
   import javax.xml.bind.annotation.XmlAccessorType;
   import javax.xml.bind.annotation.XmlRootElement;/*** Created with IntelliJ IDEA.** @Author: Administrator* @Date: 2023/04/17/13:32* @Description:*/@XmlRootElement(name = "WinResponse")
   @XmlAccessorType(XmlAccessType.FIELD)
   public class WinResponse {private RowItem rowItem;public WinResponse() {}public WinResponse(RowItem rowItem) {this.rowItem = rowItem;}public RowItem getRowItem() {return rowItem;}public void setRowItem(RowItem rowItem) {this.rowItem = rowItem;}
   }	
   

   import javax.xml.bind.annotation.XmlRootElement;/*** Created with IntelliJ IDEA.** @Author: Administrator* @Date: 2023/04/17/13:32* @Description:*/
   @XmlRootElement
   public class RowItem {private String brlb;private String codetype;private String code;public RowItem() {}public RowItem(String brlb, String codetype, String code) {this.brlb = brlb;this.codetype = codetype;this.code = code;}public String getBrlb() {return brlb;}public void setBrlb(String brlb) {this.brlb = brlb;}public String getCodetype() {return codetype;}public void setCodetype(String codetype) {this.codetype = codetype;}public String getCode() {return code;}public void setCode(String code) {this.code = code;}
   }
   

③效果图

2. 字符串转xml标签

   /*** * @param value 标签内的值* @param xml 标签名称* @return* @throws Exception*/
   public static String convertStringToXml(String value, String xml) throws Exception {// 创建一个新的 XML 文档DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = factory.newDocumentBuilder();Document doc = builder.newDocument();// 创建根元素Element rootElement = doc.createElement(xml);doc.appendChild(rootElement);// 创建子元素并设置文本内容rootElement.setTextContent(value);// 将 XML 文档转换为字符串TransformerFactory tfactory = TransformerFactory.newInstance();Transformer transformer = tfactory.newTransformer();transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");StringWriter writer = new StringWriter();transformer.transform(new DOMSource(doc), new StreamResult(writer));return writer.toString();}