我怎样才能将 XPath 与 java 一起用于这个 XML？

Question

这是一个缩短版本，出于 xml 即时接收的安全原因而更改了数据，我正在尝试检查字段“workemail”是否为空，如果不是，我将创建一个：

我已经尝试使用它的绝对路径和相对路径，并使用 getLength 来查看它是否给了我任何东西，但我只得到：

java.net.MalformedURLException: no protocol



public void checkEmployeeEmail(String input) throws IOException, ParserConfigurationException, SAXException, XPathExpressionException {
        DocumentBuilderFactory factory =
                DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();

        StringBuilder xmlStringBuilder = new StringBuilder();
        ByteArrayInputStream inputStream =  new ByteArrayInputStream(
                xmlStringBuilder.toString().getBytes("UTF-8"));
        Document doc = builder.parse(input);
        XPath xPath =  XPathFactory.newInstance().newXPath();
        String expression = "//*/PersonalInfo_GetAll_AllEmployeesByCompanyResult/PersonalInfoItem/EmailWork";
        NodeList nodeList = (NodeList) xPath.compile(expression).evaluate(doc, XPathConstants.NODESET);
        System.out.println(nodeList.getLength());

    }
}




<?xml version="1.0" encoding="utf-8"?>

<soap:Envelope
    xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">

    <soap:Body>
        <PersonalInfo_GetAll_AllEmployeesByCompanyResponse
            xmlns="https://api.nmbrs.nl/soap/v3/EmployeeService">
            <PersonalInfo_GetAll_AllEmployeesByCompanyResult>
                <PersonalInfoItem>
                    <EmployeeId>1</EmployeeId>
                    <EmployeePersonalInfos>
                        <PersonalInfo_V2>
                            <Id>1</Id>
                            <DisplayName>person 1</DisplayName>
                            <EmployeeNumber>7</EmployeeNumber>
                            <FirstName>firstname1</FirstName>
                            <Initials>T.T</Initials>
                            <LastName>firstname</LastName>
                            <Nickname>lastname</Nickname>
                            <Gender>female</Gender>
                            <NationalityCode>1</NationalityCode>
                            <PlaceOfBirth>amsterdam</PlaceOfBirth>
                            <CountryOfBirthISOCode>NL</CountryOfBirthISOCode>
                            <IdentificationNumber>NV2H6DD52</IdentificationNumber>
                            <IdentificationType>10</IdentificationType>
                            <TelephoneMobilePrivate>0000000</TelephoneMobilePrivate>
                            <TelephoneMobileWork>000000</TelephoneMobileWork>
                            <EmailPrivate>person@gmail.com</EmailPrivate>
                            <EmailWork>tblabla@workemail.com</EmailWork>
                            <BurgerlijkeStaat>2</BurgerlijkeStaat>
                            <Naamstelling>1</Naamstelling>
                            <Birthday>1994-04-14T00:00:00</Birthday>
                            <CreationDate>2020-07-30T08:54:41.04</CreationDate>
                            <StartPeriod>7</StartPeriod>
                            <StartYear>2020</StartYear>
                        </PersonalInfo_V2>
                        <PersonalInfo_V2>
                            <Id>98351</Id>
                            <DisplayName>person2</DisplayName>
                            <EmployeeNumber>7</EmployeeNumber>
                            <LastName>lastname2</LastName>
                            <Nickname>firstname2</Nickname>
                            <Gender>undefined</Gender>
                            <NationalityCode>0</NationalityCode>
                            <IdentificationType>0</IdentificationType>
                            <EmailWork>person2@workemail.com</EmailWork>
                            <BurgerlijkeStaat>0</BurgerlijkeStaat>
                            <Naamstelling>0</Naamstelling>
                            <Birthday>0001-01-01T00:00:00</Birthday>
                            <CreationDate>2020-06-17T12:52:21.273</CreationDate>
                            <StartPeriod>1</StartPeriod>
                            <StartYear>1</StartYear>
                        </PersonalInfo_V2>
                    </EmployeePersonalInfos>
                </PersonalInfoItem>
                 </EmployeePersonalInfos>
                </PersonalInfoItem>
            </PersonalInfo_GetAll_AllEmployeesByCompanyResult>
        </PersonalInfo_GetAll_AllEmployeesByCompanyResponse>
    </soap:Body>
</soap:Envelope>

Answer 1

你需要改变：

Document doc = builder.parse(input);

收件人：

Document doc = builder.parse(new File("C:\\temp\\test.xml"));

解释见下文：java.net.MalformedURLException: no protocol

几件事：

1. 我没有发现以下任何用途：

   ByteArrayInputStream inputStream = new ByteArrayInputStream( xmlStringBuilder.toString().getBytes("UTF-8"));

2. 您可能找不到电子邮件，因为您的 xml 具有命名空间定义。如果遇到这种情况，请参阅：

how to ignore namespaces with XPath

1. 您的 xml 格式错误。我在下面给出了固定的：

      <?xml version="1.0" encoding="utf-8"?>
      <soap:Envelope
      xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   
      <soap:Body>
          <PersonalInfo_GetAll_AllEmployeesByCompanyResponse
              xmlns="https://api.nmbrs.nl/soap/v3/EmployeeService">
              <PersonalInfo_GetAll_AllEmployeesByCompanyResult>
                  <PersonalInfoItem>
                      <EmployeeId>1</EmployeeId>
                      <EmployeePersonalInfos>
                          <PersonalInfo_V2>
                              <Id>1</Id>
                              <DisplayName>person 1</DisplayName>
                              <EmployeeNumber>7</EmployeeNumber>
                              <FirstName>firstname1</FirstName>
                              <Initials>T.T</Initials>
                              <LastName>firstname</LastName>
                              <Nickname>lastname</Nickname>
                              <Gender>female</Gender>
                              <NationalityCode>1</NationalityCode>
                              <PlaceOfBirth>amsterdam</PlaceOfBirth>
                              <CountryOfBirthISOCode>NL</CountryOfBirthISOCode>
                              <IdentificationNumber>NV2H6DD52</IdentificationNumber>
                              <IdentificationType>10</IdentificationType>
                              <TelephoneMobilePrivate>0000000</TelephoneMobilePrivate>
                              <TelephoneMobileWork>000000</TelephoneMobileWork>
                              <EmailPrivate>person@gmail.com</EmailPrivate>
                              <EmailWork>tblabla@workemail.com</EmailWork>
                              <BurgerlijkeStaat>2</BurgerlijkeStaat>
                              <Naamstelling>1</Naamstelling>
                              <Birthday>1994-04-14T00:00:00</Birthday>
                              <CreationDate>2020-07-30T08:54:41.04</CreationDate>
                              <StartPeriod>7</StartPeriod>
                              <StartYear>2020</StartYear>
                          </PersonalInfo_V2>
                          <PersonalInfo_V2>
                              <Id>98351</Id>
                              <DisplayName>person2</DisplayName>
                              <EmployeeNumber>7</EmployeeNumber>
                              <LastName>lastname2</LastName>
                              <Nickname>firstname2</Nickname>
                              <Gender>undefined</Gender>
                              <NationalityCode>0</NationalityCode>
                              <IdentificationType>0</IdentificationType>
                              <EmailWork>person2@workemail.com</EmailWork>
                              <BurgerlijkeStaat>0</BurgerlijkeStaat>
                              <Naamstelling>0</Naamstelling>
                              <Birthday>0001-01-01T00:00:00</Birthday>
                              <CreationDate>2020-06-17T12:52:21.273</CreationDate>
                              <StartPeriod>1</StartPeriod>
                              <StartYear>1</StartYear>
                          </PersonalInfo_V2>                        
                      </EmployeePersonalInfos>
                  </PersonalInfoItem>
              </PersonalInfo_GetAll_AllEmployeesByCompanyResult>
          </PersonalInfo_GetAll_AllEmployeesByCompanyResponse>
      </soap:Body>
    </soap:Envelope>