JAVA：使用Xmlserializer編寫xml - 上下文問題

Question

我正在嘗試編寫XML文檔並將其POST，但在使用XmlSerializer（我在Android Studio中工作）時無法獲得正確的文檔格式。

我希望寫的XML：

<?xml version="1.0" encoding="UTF-8"?> 
<ser:serviceParameters xmlns:ser="http://www.endinfosys.com/Voyager/serviceParameters"> 
    <ser:parameters> 
     <ser:parameter key="action"> 
     <ser:value>add</ser:value> 
     </ser:parameter> 
    </ser:parameters> 
    <ser:patronIdentifier lastName="LastName" patronHomeUbId="1@DB" patronId="12345"> 
    <ser:authFactor type="B">150</ser:authFactor> 
    </ser:patronIdentifier> 
    <ser:definedParameters xsi:type="pat:bookbagRecordsType" xlns:pat="http://www.endinfosys.com/Voyager/patronPreferences" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> 
    <pat:record> 
      <pat:bibId>54414</pat:bibId> 
      <pat:databaseCode>LOCAL</pat:databaseCode> 
    </pat:record> 
    </ser:definedParameters> 
</ser:serviceParameters> 

這是我必須生產代碼XML：

private static String writeXml(String surname, String barcode, String thisbibid){ 
    XmlSerializer serializer = Xml.newSerializer(); 
    StringWriter writer = new StringWriter(); 
    try { 
     serializer.setOutput(writer); 
     serializer.startDocument("UTF-8", true); 
     serializer.startTag("ser", "serviceParameters"); 
     serializer.attribute("http://www.endinfosys.com/Voyager/serviceParameters", "xmlns", "ser"); 
     serializer.startTag("ser", "parameters"); 
     serializer.startTag("ser", "parameter"); 
     serializer.attribute("ser", "action", "add"); 
     serializer.endTag("ser", "parameter"); 
     serializer.endTag("ser", "parameters"); 
     serializer.startTag("ser", "patronIdentifier"); 
     serializer.attribute("", "lastName", surname); 
      serializer.attribute("", "patronHomeUbId", "local"); 
      serializer.attribute("", "patronId", "12345"); 
      serializer.startTag("ser", "authFactor"); 
       serializer.attribute("", "type", "B"); 
     serializer.text("150"); 
      serializer.endTag("ser", "authFactor"); 
     serializer.endTag("ser", "patronIdentifier"); 
     serializer.startTag("ser", "definedParameters"); 
     serializer.attribute("http://www.endinfosys.com/Voyager/patronPreferences", "xmlns", "pat"); 
     serializer.attribute("pat", "bookbagRecordsType", "xsi:type"); 
     serializer.startTag("pat", "record"); 
      serializer.startTag("pat", "bibId"); 
       serializer.text(thisbibid); 
      serializer.endTag("pat", "bibId"); 
      serializer.startTag("pat", "databaseCode"); 
       serializer.text("LOCAL"); 
      serializer.endTag("pat", "databaseCode"); 
     serializer.endTag("pat", "record"); 
     serializer.endTag("ser", "definedParameters"); 
     serializer.endTag("ser", "serviceParameters"); 
     serializer.endDocument(); 
     return writer.toString(); 
    } catch (Exception e) { 
     throw new RuntimeException(e); 
    } 
} 

但是字符串輸出爲：

<?xml version='1.0' encoding='UTF-8' standalone='yes' ?><n0:serviceParameters n1:xmlns="ser" xmlns:n0="ser" xmlns:n1="http://www.endinfosys.com/Voyager/serviceParameters"><n0:parameters><n0:parameter n0:action="add" /></n0:parameters><n0:patronIdentifier lastName="LastName" patronHomeUbId="local" patronId="12345"><n0:authFactor type="B">150</n0:authFactor></n0:patronIdentifier><n0:definedParameters n2:xmlns="pat" n3:bookbagRecordsType="xsi:type" xmlns:n2="http://www.endinfosys.com/Voyager/patronPreferences" xmlns:n3="pat"><n3:record><n3:bibId>54414</n3:bibId><n3:databaseCode>LOCAL</n3:databaseCode></n3:record></n0:definedParameters></n0:serviceParameters> 

我已嘗試改變.attribute元素的順序，但無法正確獲取前綴。任何幫助，將不勝感激

Answer 1

哪些包是Xml.newSerializer（）？我試圖重現你的錯誤，顯然你的代碼是確定的。它應該返回預期的XML。

Answer 2

找到setPrefix方法和大量的試驗和錯誤後，我得到了XML的格式以匹配需要的內容。

private static String writeXml(String surname, String barcode, String thisbibid){ 
    XmlSerializer serializer = Xml.newSerializer(); 
    StringWriter writer = new StringWriter(); 
    try { 
     serializer.setOutput(writer); 
     serializer.startDocument("UTF-8", true); 
     serializer.setPrefix("ser", "http://www.endinfosys.com/Voyager/serviceParameters"); 
     serializer.startTag("", "ser:serviceParameters"); 
     serializer.startTag("", "ser:parameters"); 
     serializer.startTag("", "ser:parameter"); 
     serializer.attribute("", "key", "action"); 
     serializer.startTag("", "ser:value"); 
     serializer.text("add"); 
     serializer.endTag("", "ser:value"); 
     serializer.endTag("", "ser:parameter"); 
     serializer.endTag("", "ser:parameters"); 
     serializer.startTag("", "ser:patronIdentifier"); 
     serializer.attribute("", "lastName", surname); 
     serializer.attribute("", "patronHomeUbId", "local"); 
     serializer.attribute("", "patronId", "12345"); 
     serializer.startTag("", "ser:authFactor"); 
     serializer.attribute("", "type", "B"); 
     serializer.text("150"); 
     serializer.endTag("", "ser:authFactor"); 
     serializer.endTag("", "ser:patronIdentifier"); 
     serializer.setPrefix("pat", "http://www.endinfosys.com/Voyager/patronPreferences"); 
     serializer.setPrefix("xsi", "http://www.w3.org/2001/XMLSchema-instance"); 
     serializer.startTag("", "ser:definedParameters"); 
     serializer.attribute("", "xsi:type", "pat:bookbagRecordsType"); 
     serializer.startTag("", "pat:record"); 
      serializer.startTag("", "pat:bibId"); 
       serializer.text(thisbibid); 
      serializer.endTag("", "pat:bibId"); 
      serializer.startTag("", "pat:databaseCode"); 
       serializer.text("LOCAL"); 
      serializer.endTag("", "pat:databaseCode"); 
     serializer.endTag("", "pat:record"); 
     serializer.endTag("", "ser:definedParameters"); 
     serializer.endTag("", "ser:serviceParameters"); 
     serializer.endDocument(); 
     return writer.toString(); 
    } catch (Exception e) { 
     throw new RuntimeException(e); 
    } 
} 

不必設置前綴，然後選擇「硬編碼」，它在開始/結束標記不是從文檔清晰的http://developer.android.com/reference/org/xmlpull/v1/XmlSerializer.html。

現在向前移動到下一個絆腳石;）