【Bean转XML】JAXB读取xml文档转换为java对象报错：IllegalAnnotationExceptions 类的两个属性具有相同名称 "corpId"

1、POM 依赖　　

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<dependency>             <groupId>javax.xml.bind</groupId>             <artifactId>jaxb-api</artifactId>             <version>2.3.1</version>         </dependency>           <dependency>             <groupId>com.sun.xml.bind</groupId>             <artifactId>jaxb-impl</artifactId>             <version>2.3.0</version>         </dependency>         <dependency>             <groupId>org.glassfish.jaxb</groupId>             <artifactId>jaxb-runtime</artifactId>             <version>2.3.0</version>         </dependency>         <dependency>             <groupId>javax.activation</groupId>             <artifactId>activation</artifactId>             <version>1.1.1</version>         </dependency>

　　2、转换工具类

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package com.tencent.iov.qw.utils;   import com.google.common.base.Charsets; import javax.xml.bind.JAXBContext; import javax.xml.bind.JAXBException; import javax.xml.bind.Marshaller; import javax.xml.bind.Unmarshaller; import java.io.StringReader; import java.io.StringWriter; import java.util.HashMap; import java.util.Map;   /**  * XML处理工具  *  * @author YG  * @date 2020/01/27  */ public class XmlParseUtill {       /**      * java对象转xml      *      * @param obj 对象      *      * @return xml      */     public static String toXml(Object obj) {         Map<String, Object> props = new HashMap<>(5);         // 是否格式化输出xml         props.put(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);         // 输出编码         props.put(Marshaller.JAXB_ENCODING, Charsets.UTF_8.name());         // 是否省略xml头信息（<?xml version="1.0" encoding="gb2312" standalone="yes"?>）         props.put(Marshaller.JAXB_FRAGMENT, false);         return toXml(obj, props);     }       /**      * java对象转xml      *      * @param obj   对象      * @param props xml转换的配置熟悉      *      * @return xml      */     public static String toXml(Object obj, Map<String, Object> props) {         if (obj == null) {             return "";         }         StringWriter sw = new StringWriter();         try {             JAXBContext context = JAXBContext.newInstance(obj.getClass());             Marshaller marshaller = context.createMarshaller();               for (Map.Entry<String, Object> entry : props.entrySet()) {                 String key = entry.getKey();                 Object value = entry.getValue();                 marshaller.setProperty(key, value);             }               marshaller.marshal(obj, sw);         } catch (JAXBException e) {             throw new RuntimeException("convert to Xml failed", e);         }         return sw.toString();     }       /**      * 解析xml      *      * @param xmlStr xml      * @param clazz  类型      */     public static <T> T parseXml(String xmlStr, Class<T> clazz) {         T xmlObject;         try {             JAXBContext context = JAXBContext.newInstance(clazz);             Unmarshaller unmarshal = context.createUnmarshaller();             StringReader sr = new StringReader(xmlStr);             //noinspection unchecked             xmlObject = (T) unmarshal.unmarshal(sr);         } catch (Exception e) {             throw new RuntimeException("parse from Xml String failed", e);         }         return xmlObject;     }   }

3、Java Bean 转XMl，实体类

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@Data @ConfigurationProperties(prefix = "wechat.cp") @RefreshScope @XmlRootElement(name = "xml") public class WxCpProperties {   /**    * 设置微信企业号的corpId    */   @XmlElement(name = "AppId")   private String corpId;     private List<AppConfig> appConfigs;   }

　　4、转换异常原因分析：　　

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xception in thread "main" java.lang.RuntimeException: convert to Xml failed     at com.tencent.iov.qw.utils.XmlParseUtill.toXml(XmlParseUtill.java:74)     at com.tencent.iov.qw.utils.XmlParseUtill.toXml(XmlParseUtill.java:41)     at com.tencent.iov.qw.utils.XmlParseUtill.main(XmlParseUtill.java:47) Caused by: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions 类的两个属性具有相同名称 "corpId"     this problem is related to the following location:         at public java.lang.String com.tencent.iov.qw.config.WxCpProperties.getCorpId()         at com.tencent.iov.qw.config.WxCpProperties     this problem is related to the following location:         at private java.lang.String com.tencent.iov.qw.config.WxCpProperties.corpId         at com.tencent.iov.qw.config.WxCpProperties

　　　　使用@Data注解，但是处理器同时处理访问了字段熟悉和Get方法，只需要指定处理程序只访问字段就行了

　　　　在类上加上注解： @XmlAccessorType(XmlAccessType.FIELD) ，再次处理正常

5、处理结果　

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<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <xml>     <AppId>45166</AppId> </xml>