我有一个非常大的 XML 字符串。我在这里仅发布 XML 对象的一部分。我正在尝试将此 XML 转换为 Java 对象。我的第一个问题是,我是否需要创建全部 XML 标记值的 Java 对象,或者我可以创建仅选定的内部 XML 对象的 Java 对象吗?请找到我的 XML 字符串。
<DATAPACKET REQUEST-ID = "2">
<HEADER>
<RESPONSE-TYPE CODE="1" DESCRIPTION="Response DataPacket"/>
<SEARCH-RESULT-LIST>
<SEARCH-RESULT-ITEM>
<NAME MATCHED="TRUE"/>
</SEARCH-RESULT-ITEM>
</SEARCH-RESULT-LIST>
</HEADER>
<BODY>
<CONS_SCORE>
<SCORE>0</SCORE>
<REASON1>
<HEADER></HEADER>
<DESCRIPTION></DESCRIPTION>
</REASON1>
<REASON2>
<HEADER></HEADER>
<DESCRIPTION></DESCRIPTION>
</REASON2>
<REASON3>
<HEADER></HEADER>
<DESCRIPTION></DESCRIPTION>
</REASON3>
<REASON4>
<HEADER></HEADER>
<DESCRIPTION></DESCRIPTION>
</REASON4>
</CONS_SCORE>
<CONSUMER_PROFILE2>
<CONSUMER_DETAILS2>
<RUID>1234</RUID>
<NAME>ABC</NAME>
<DATE_OF_BIRTH>1980-03-03T00:00:00+03:00</DATE_OF_BIRTH>
<GENDER>001</GENDER>
</CONSUMER_DETAILS2>
<ID_DETAILS2>
<SLNO>1</SLNO>
<SOURCE_ID>001</SOURCE_ID>
<ID_VALUE>2806</ID_VALUE>
<EXP_DATE>2018-07-13T00:00:00+03:00</EXP_DATE>
</ID_DETAILS2>
</CONSUMER_PROFILE2>
</BODY>
</DATAPACKET>
在上面的对象中,我只想获取 CONSUMER_PROFILE2 对象。这是我的 Dto 类
@XmlRootElement(name = "DATAPACKET")
public class ConsumerProfileDto {
private ConsumerDetailsDto CONSUMER_DETAILS2;
private IdDetailsDto ID_DETAILS2;
public ConsumerDetailsDto getCONSUMER_DETAILS2() {
return CONSUMER_DETAILS2;
}
public void setCONSUMER_DETAILS2(ConsumerDetailsDto cONSUMER_DETAILS2) {
CONSUMER_DETAILS2 = cONSUMER_DETAILS2;
}
public IdDetailsDto getID_DETAILS2() {
return ID_DETAILS2;
}
public void setID_DETAILS2(IdDetailsDto iD_DETAILS2) {
ID_DETAILS2 = iD_DETAILS2;
}
}
CONSUMER_DETAILS2 类
@XmlRootElement(name = "CONSUMER_DETAILS2")
public class ConsumerDetailsDto {
private String NAME;
private String DATE_OF_BIRTH;
private String GENDER;
private String NATIONALITY;
public String getNAME() {
return NAME;
}
public void setNAME(String nAME) {
NAME = nAME;
}
public String getDATE_OF_BIRTH() {
return DATE_OF_BIRTH;
}
public void setDATE_OF_BIRTH(String dATE_OF_BIRTH) {
DATE_OF_BIRTH = dATE_OF_BIRTH;
}
public String getGENDER() {
return GENDER;
}
public void setGENDER(String gENDER) {
GENDER = gENDER;
}
public String getNATIONALITY() {
return NATIONALITY;
}
public void setNATIONALITY(String nATIONALITY) {
NATIONALITY = nATIONALITY;
}
这是解码代码
JAXBContext jaxbContext = JAXBContext.newInstance(ConsumerProfileDto.class);
StringReader reader = new StringReader(responseXML);
Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
ConsumerDetailsDto que= (ConsumerDetailsDto) jaxbUnmarshaller.unmarshal(reader);
System.out.println(que.getDATE_OF_BIRTH());
System.out.println(que.getGENDER());;
System.out.println(que.getNAME());
附注
我使用了 DocumentBuilder,并且可以使用它获取值。但是,我想使用 Jaxb 进行提取。
最佳答案
您无法将反射(reflect)您感兴趣的 XML 元素的 Java 类注释为 @XmlRootElement。您必须在 Java 中镜像所有 XML 元素,从 XML 文件中的最顶层元素 (DATAPACKET) 到您感兴趣的路径中的最低元素(CONSUMER_DETAILS2 和 ID_DETAILS2),即使您只对其中的某些元素感兴趣。
我假设运算符(operator)对 RUID 不感兴趣(因为类 CONSUMER_DETAILS2 不包含此 XML 元素的字段),并且不会从此 XML 加载字段 NATIONALITY。
如果问题的输入 XML 位于名为 input2.xml 的文件中,那么我将拥有以下 Java 类:
数据包
package test;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
@XmlAccessorType(XmlAccessType.NONE)
@XmlRootElement(name = "DATAPACKET")
public class DataPacket {
@XmlAttribute(name = "REQUEST_ID")
private int REQUEST_ID;
@XmlElement(name ="BODY")
private Body BODY;
public DataPacket(){}
public int getREQUEST_ID() {
return REQUEST_ID;
}
public void setREQUEST_ID(int REQUEST_ID) {
this.REQUEST_ID = REQUEST_ID;
}
public Body getBODY() {
return BODY;
}
public void setBODY(Body BODY) {
this.BODY = BODY;
}
}
正文
package test;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
@XmlAccessorType(XmlAccessType.NONE)
class Body {
@XmlElement(name = "CONSUMER_PROFILE2")
private ConsumerProfile profile;
public Body(){}
public ConsumerProfile getProfile() {
return profile;
}
public void setProfile(ConsumerProfile profile) {
this.profile = profile;
}
}
消费者概况
package test;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
@XmlAccessorType(XmlAccessType.NONE)
public class ConsumerProfile {
@XmlElement(name = "CONSUMER_DETAILS2")
private ConsumerDetails CONSUMER_DETAILS2;
@XmlElement(name = "ID_DETAILS2")
private IdDetails ID_DETAILS2;
public ConsumerProfile(){}
public ConsumerDetails getCONSUMER_DETAILS2() {
return CONSUMER_DETAILS2;
}
public void setCONSUMER_DETAILS2(ConsumerDetails cONSUMER_DETAILS2) {
CONSUMER_DETAILS2 = cONSUMER_DETAILS2;
}
public IdDetails getID_DETAILS2() {
return ID_DETAILS2;
}
public void setID_DETAILS2(IdDetails iD_DETAILS2) {
ID_DETAILS2 = iD_DETAILS2;
}
}
消费者详细信息
package test;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
@XmlAccessorType(XmlAccessType.NONE)
class ConsumerDetails {
@XmlElement(name="NAME")
private String NAME;
@XmlElement(name="DATE_OF_BIRTH")
private String DATE_OF_BIRTH;
@XmlElement(name="GENDER")
private String GENDER;
private String NATIONALITY;
public ConsumerDetails(){}
public String getNAME() {
return NAME;
}
public void setNAME(String nAME) {
NAME = nAME;
}
public String getDATE_OF_BIRTH() {
return DATE_OF_BIRTH;
}
public void setDATE_OF_BIRTH(String dATE_OF_BIRTH) {
DATE_OF_BIRTH = dATE_OF_BIRTH;
}
public String getGENDER() {
return GENDER;
}
public void setGENDER(String gENDER) {
GENDER = gENDER;
}
public String getNATIONALITY() {
return NATIONALITY;
}
public void setNATIONALITY(String nATIONALITY) {
NATIONALITY = nATIONALITY;
}
}
ID详细信息
package test;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
@XmlAccessorType(XmlAccessType.NONE)
class IdDetails {
@XmlElement(name="SLNO")
private int SLNO;
@XmlElement(name="SOURCE_ID")
private String SOURCE_ID;
@XmlElement(name="ID_VALUE")
private int ID_VALUE;
@XmlElement(name="EXP_DATE")
private String EXP_DATE;
public IdDetails(){}
public int getSLNO() {
return SLNO;
}
public void setSLNO(int SLNO) {
this.SLNO = SLNO;
}
public String getSOURCE_ID() {
return SOURCE_ID;
}
public void setSOURCE_ID(String SOURCE_ID) {
this.SOURCE_ID = SOURCE_ID;
}
public int getID_VALUE() {
return ID_VALUE;
}
public void setID_VALUE(int ID_VALUE) {
this.ID_VALUE = ID_VALUE;
}
public String getEXP_DATE() {
return EXP_DATE;
}
public void setEXP_DATE(String EXP_DATE) {
this.EXP_DATE = EXP_DATE;
}
}
此外,在同一个“测试”包中,jaxb.index 文件包含:
DataPacket
ConsumerProfile
ConsumerDetails
IdDetails
然后,当使用这个 Test 类进行测试时:
package test;
import java.io.File;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
public class Test {
public static void main(String[] args) {
try{
JAXBContext jc = JAXBContext.newInstance(DataPacket.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
File xml = new File("input2.xml");
DataPacket dp = (DataPacket) unmarshaller.unmarshal(xml);
Body body = dp.getBODY();
ConsumerProfile profile = body.getProfile();
ConsumerDetails consumerDetail = profile.getCONSUMER_DETAILS2();
IdDetails idDetails = profile.getID_DETAILS2();
System.out.println("ConsumerDetails name:"+consumerDetail.getNAME()+
" date of birth:"+consumerDetail.getDATE_OF_BIRTH()+
" gender:"+consumerDetail.getGENDER()+
"IdDetails SLNO:"+idDetails.getSLNO()+
" SOURCE_ID:"+idDetails.getSOURCE_ID()+
" ID_VALUE:"+idDetails.getID_VALUE()+
" EXP_DATE:"+idDetails.getEXP_DATE());
}
catch(JAXBException e){
System.out.println(e.getMessage());
e.printStackTrace();
}
}
}
关于java - 无法在 Java 中使用 Jaxb 仅提取选定的标签值,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46463740/