【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　　

<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

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

@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：　　

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　

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