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全球观点：Xml转Java实体类对象 xml转Javabena 对象 且多级嵌套 复杂嵌套

来源：博客园


(资料图片)

最近在做企微开发，遇到了一个比较复杂的xml然后要去我将xml转成实体类xml如下

 1403610513create_user11380000000011        
01<![CDATA[企业微信]]>

为了看起来更加清晰我将这个xml转JSON 的放在下面

{  "xml": {    "ToUserName": "toUser",    "FromUserName": "sys",    "CreateTime": "1403610513",    "MsgType": "event",    "Event": "change_contact",    "ChangeType": "create_user",    "UserID": "zhangsan",    "Name": "张三",    "Department": "1,2,3",    "MainDepartment": "1",    "IsLeaderInDept": "1,0,0",    "DirectLeader": "lisi,wangwu",    "Position": "产品经理",    "Mobile": "13800000000",    "Gender": "1",    "Email": "zhangsan@gzdev.com",    "BizMail": "zhangsan@qyycs2.wecom.work",    "Status": "1",    "Avatar": "http://wx.qlogo.cn/mmopen/ajNVd",    "Alias": "zhangsan",    "Telephone": "020-123456",    "Address": "广州市",    "ExtAttr": {      "Item": [        {          "Name": "爱好",          "Type": "0",          "Text": {            "Value": "旅游"          }        },        {          "Name": "卡号",          "Type": "1",          "Web": {            "Title": "企业微信",            "Url": "https://work.weixin.qq.com"          }        }      ]    }  }}

由此我们发现企微回调的这个xml的层级比较复杂 那接下来我们将正式开始转Javabena对象

引入依赖

            javax.xml.bind            jaxb-api                            com.sun.xml.bind            jaxb-core            2.3.0                            com.sun.xml.bind            jaxb-impl            2.3.0                            org.glassfish.jaxb            jaxb-runtime            2.3.0                            javax.activation            activation            1.1.1

根据映射关系建立实体类 并添加JAXB注解

  • @XmlRootElement。这是在JAXB中使用的Object必须有的注解。它定义了XML内容的根元素。
  • @XmlType。它将类映射到XML模式类型。我们可以用它来排列XML中的元素。
  • @XmlTransient。这将确保Object属性不被写入XML中。
  • @XmlAttribute: 这将创建Object属性作为一个属性。
  • @XmlElement(name = “ABC”): 这将创建名称为 "ABC "的元素。
  • @XmlElementWrapper： 注解表示生成一个包装器元素（一般用于集合元素）。我们注意到企微回调的xml层级比较复杂 那么这个实体类我们就要思考思考了我已经给你们建好了如下
import lombok.AllArgsConstructor;import lombok.Builder;import lombok.Data;import lombok.NoArgsConstructor;import javax.xml.bind.annotation.*;import java.util.List;@Builder@Data@AllArgsConstructor@NoArgsConstructor@XmlRootElement(name = "xml")@XmlAccessorType(XmlAccessType.FIELD)@XmlType(propOrder = {        "toUserName",        "fromUserName",        "createTime",        "msgType",        "event",        "changeType",        "userID",        "name",        "department",        "mainDepartment",        "isLeaderInDept",        "directLeader",        "position",        "mobile",        "gender",        "email",        "bizMail",        "status",        "avatar",        "alias",        "telephone",        "address",        "items",})public class MemberXml {    @XmlElement(name = "ToUserName",required = true)    private String toUserName;    @XmlElement(name = "FromUserName",required = true)    private String fromUserName;    @XmlElement(name = "CreateTime",required = true)    private String createTime;    @XmlElement(name = "MsgType",required = true)    private String msgType;    @XmlElement(name = "Event",required = true)    private String event;    @XmlElement(name = "ChangeType",required = true)    private String changeType;    @XmlElement(name = "UserID",required = true)    private String userID;    @XmlElement(name = "Name",required = true)    private String name;    @XmlElement(name = "Department",required = true)    private String department;    @XmlElement(name = "MainDepartment",required = true)    private String mainDepartment;    @XmlElement(name = "IsLeaderInDept",required = true)    private String isLeaderInDept;    @XmlElement(name = "DirectLeader",required = true)    private String directLeader;    @XmlElement(name = "Position",required = true)    private String position;    @XmlElement(name = "Mobile",required = true)    private String mobile;    @XmlElement(name = "Gender",required = true)    private String gender;    @XmlElement(name = "Email",required = true)    private String email;    @XmlElement(name = "BizMail",required = true)    private String bizMail;    @XmlElement(name = "Status",required = true)    private String status;    @XmlElement(name = "Avatar",required = true)    private String avatar;    @XmlElement(name = "Alias",required = true)    private String alias;    @XmlElement(name = "Telephone",required = true)    private String telephone;    @XmlElement(name = "Address",required = true)    private String address;    @XmlElementWrapper(name = "ExtAttr",required = true)    @XmlElement(name = "Item",required = true)    private List items;}
import lombok.AllArgsConstructor;import lombok.Builder;import lombok.Data;import lombok.NoArgsConstructor;import javax.xml.bind.annotation.*;@Builder@Data@AllArgsConstructor@NoArgsConstructor@XmlRootElement(name = "Item")@XmlAccessorType(XmlAccessType.FIELD)@XmlType(propOrder ={        "type",        "name",        "webValue",        "textValue"} )public class Item {    @XmlElement(name = "Type",required = true)    private String type;    @XmlElement(name = "Name",required = true)    private String name;    @XmlElement(name = "Text",required = true)    private TextValue textValue;    @XmlElement(name = "Web",required = true)    private WebValue webValue;}
import lombok.AllArgsConstructor;import lombok.Builder;import lombok.Data;import lombok.NoArgsConstructor;import javax.xml.bind.annotation.*;@Builder@Data@AllArgsConstructor@NoArgsConstructor@XmlAccessorType(XmlAccessType.FIELD)@XmlRootElement(name = "Text")@XmlType(propOrder ={        "value"} )public class TextValue {    @XmlElement(name = "Value",required = true)    private String value;}
import lombok.AllArgsConstructor;import lombok.Builder;import lombok.Data;import lombok.NoArgsConstructor;import javax.xml.bind.annotation.*;@Builder@Data@AllArgsConstructor@NoArgsConstructor@XmlRootElement(name = "Web")@XmlAccessorType(XmlAccessType.FIELD)@XmlType(propOrder ={        "title",        "url"} )public class WebValue {    @XmlElement(name = "Title",required = true)    private String title;    @XmlElement(name = "Url",required = true)    private String url;}

创建xml和实体互转的工具类

public class JaxbUtil { /** * JavaBean转换成xml *  * @param obj * @param encoding * @return */public static String convertToXml(Object obj, String encoding) {String result = null;try {JAXBContext context = JAXBContext.newInstance(obj.getClass());Marshaller marshaller = context.createMarshaller();marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding); StringWriter writer = new StringWriter();marshaller.marshal(obj, writer);result = writer.toString();} catch (Exception e) {e.printStackTrace();} return result;} /** * xml转换成JavaBean *  * @param xml * @param c * @return */@SuppressWarnings("unchecked")public static  T converyToJavaBean(String xml, Class c) {T t = null;try {JAXBContext context = JAXBContext.newInstance(c);Unmarshaller unmarshaller = context.createUnmarshaller();t = (T) unmarshaller.unmarshal(new StringReader(xml));} catch (Exception e) {e.printStackTrace();} return t;}}

测试

现在我们测试一下 将xml与实体类对象传入

打印测试结果成功

当然如果有人发现Items没有赋值成功 那就要检查实体类中的注解是否正确

比如根节点是否标记正确

关键词： 比较复杂 产品经理 作为一个