xml和bean互相转换的两种方式

绝地灬酷狼 2022-03-11 09:00 866阅读 0赞

1.JAXB

注解：

@XmlRootElement(name = "xml") 根外包裹标签名
    @XmlAccessorType(XmlAccessType.FIELD) 注解加在属性上即可

@XmlElement(name = "Voice")加载属性上

工具类

public static String beanToXml(Object obj, Class<?> load) {
            String xmlStr = null;
            try {
                JAXBContext context = JAXBContext.newInstance(load);
                Marshaller marshaller = context.createMarshaller();
                // 去掉生成xml的默认报文头
                marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
                StringWriter writer = new StringWriter();
                marshaller.marshal(obj, writer);
                xmlStr = writer.toString();
            } catch (JAXBException e) {
                logger.error("实体转为xml时出错!", e);
            }
            return xmlStr;
        }
    
        public static Object xmlToBean(String str, Class<?> load) {
            Object object = null;
            try {
                JAXBContext context = JAXBContext.newInstance(load);
                Unmarshaller unmarshaller = context.createUnmarshaller();
                object = unmarshaller.unmarshal(new StringReader(str));
            } catch (JAXBException e) {
                logger.error("xml转换到实体时出错!", e);
            }
            return object;
        }

jacksonXml

@JacksonXmlElementWrapper：可用于指定List等集合类，外围标签名；   
　　 @JacksonXmlProperty：指定包装标签名，或者指定标签内部属性名；   
　　 @JacksonXmlRootElement：指定生成xml根标签的名字；   
　　 @JacksonXmlText：指定当前这个值，没有xml标签包裹。

@JacksonXmlRootElement(localName = "xml")根标签

@JacksonXmlProperty(localName = "ToUserName")每个属性的标签

工具类

public static <T> T xmlToBean(String xml,Class<T> clazz){
            T t = null;
            XmlMapper xmlMapper = new XmlMapper();
            xmlMapper.configure(DeserializationFeature.FAIL_ON_IGNORED_PROPERTIES,true);
            try {
                t = xmlMapper.readValue(xml,clazz);
            } catch (IOException e) {
                logger.error("xml转换到实体时出错!", e);
                e.printStackTrace();
            }
            return t;
        }
    
        public static String beanToXml(Object object){
            XmlMapper xmlMapper = new XmlMapper();
            String xml = null;
            try {
                xmlMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
                xml = xmlMapper.writeValueAsString(object);
            } catch (JsonProcessingException e) {
                e.printStackTrace();
            }
            return xml;
        }