关于使用spring boot自带的jackson解析xml心得

一、声明版本依赖

项目负责版本管理的pom依赖如下声明引用

  <parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.7.18</version><relativePath/></parent>

在定义share或者api的pom中

添加如下依赖，因为需要用到jackson xml的注解

 <dependency><groupId>com.fasterxml.jackson.dataformat</groupId><artifactId>jackson-dataformat-xml</artifactId></dependency>

用的比较多是

@JacksonXmlRootElement 标注在类上
@JacksonXmlProperty 标注下属性上
@JacksonXmlElementWrapper 标注在集合属性上

具体怎么使用网上比我写的详细

应用pom添加如下依赖

 <dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><exclusions><exclusion><artifactId>jackson-core</artifactId><groupId>com.fasterxml.jackson.core</groupId></exclusion></exclusions></dependency>

二、示例

小demo 

@Data
@JacksonXmlRootElement(localName = "ROOT")
public class XmlBean {@JacksonXmlProperty(localName = "Name")private String name;@JacksonXmlElementWrapper(localName = "List")private List<String> list;
}   XmlMapper xmlMapper = new XmlMapper();
xmlMapper.configure(ToXmlGenerator.Feature.WRITE_XML_DECLARATION, true);
System.out.println(xmlMapper.writeValueAsString(new XmlBean()));输出
<?xml version='1.0' encoding='UTF-8'?><ROOT><Name/></ROOT>

对于有层级的集合

@Data
@JacksonXmlRootElement(localName = "ROOT")
public class XmlBean {@JacksonXmlProperty(localName = "Name")private String name;@JacksonXmlElementWrapper(localName = "List")@JacksonXmlProperty(localName = "Detail")private List<Detail> list;@Datapublic static class Detail{@JacksonXmlProperty(localName = "Key")private String key;}
}

  XmlBean xmlBean = new XmlBean();System.out.println(xmlMapper.writeValueAsString(xmlBean));xmlBean.setName("测试");XmlBean.Detail detail = new XmlBean.Detail();detail.setKey("key");xmlBean.setList(Lists.newArrayList(detail));System.out.println(xmlMapper.writerWithDefaultPrettyPrinter().writeValueAsString(xmlBean));

输出为

<ROOT><Name>测试</Name><List><Detail><Key>key</Key></Detail></List>
</ROOT>

同理，xml转bean

三、获取节点

 /*** 根据xml或者节点的值** @param xml      指定xml如此* @param nodeName 节点名称，区分大小写* @return 节点对应的值* @throws JsonProcessingException 异常*/public static String nodeValue(String xml, String nodeName) throws JsonProcessingException {XmlMapper xmlMapper = new XmlMapper();xmlMapper.configure(ToXmlGenerator.Feature.WRITE_XML_DECLARATION, false);JsonNode rootNode = xmlMapper.readTree(xml);List<JsonNode> values = rootNode.findValues(nodeName);//此处只保留第一条且需要做判空处理return values.get(0).asText();}