Question

从MySQL数据库读取数据并将其写入XML文件。 AM收到以下错误＆＃34; HIERARCHY_REQUEST_ERR：尝试插入不允许的节点。＆＃34; 任何想法如何解决这个

＆＃13;

private static Document buildCustomerXML(ResultSet _customerRS, ResultSet contractRS) throws Exception 
  { 

  Document xmlDoc = new DocumentImpl(); 

  /* Creating the root element */ 
  
  Element rootElement1 = xmlDoc.createElement("Contracts"); 
  xmlDoc.appendChild(rootElement1);
  while(contractRS.next()){
	  Element contract = xmlDoc.createElement("Contract"); 

	    /* Build the CustomerId as a Attribute*/ 
	    contract.setAttribute("ID", _customerRS.getString("ID")); 
	    rootElement1.appendChild(contract); 
  }
  Element rootElement = xmlDoc.createElement("Employees"); 
  xmlDoc.appendChild(rootElement);
  while(_customerRS.next()) 
   { 
	   
    Element employee = xmlDoc.createElement("Employee"); 

    /* Build the CustomerId as a Attribute*/ 
    employee.setAttribute("id", _customerRS.getString("id")); 

    /* Creating elements within customer DOM*/ 
    Element contractid = xmlDoc.createElement("ContractID"); 
    Element lastName = xmlDoc.createElement("Name"); 
    Element skills = xmlDoc.createElement("Skills");
    Element skill = xmlDoc.createElement("Skill");
     /* Populating Customer DOM with Data*/ 
    contractid.appendChild(xmlDoc.createTextNode(_customerRS.getString("Contractid"))); 
    lastName.appendChild(xmlDoc.createTextNode(_customerRS.getString("last"))); 
    
    skill.appendChild(xmlDoc.createTextNode(_customerRS.getString("Skill"))); 
    
    /* Adding the firstname and lastname elements to the Customer Element*/ 
    employee.appendChild(contractid); 
    employee.appendChild(lastName);
   
    skills.appendChild(skill);
    employee.appendChild(skills);
   
    

    /* Appending Customer to the Root Class*/ 
    rootElement.appendChild(employee); 
   } 
  return xmlDoc; 
  }

＆＃13;

Answer 1

问题在于您要创建两个根元素：

Element rootElement1 = xmlDoc.createElement("Contracts"); 
xmlDoc.appendChild(rootElement1);

和

Element rootElement = xmlDoc.createElement("Employees"); 
xmlDoc.appendChild(rootElement);

Document只能有一个顶级元素。您应该创建一个根元素（例如＆＃34; ContractsEmployees＆＃34;）并将这两个元素作为子元素追加。或者您可以为每个元素创建两个单独的文档。

此外，这不是创建文档的正确方法（您使用内部类）。使用文档构建器。

DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document xmlDoc = builder.newDocument();

在JAVA中创建XML文件时出错

1 个答案: