我们有一个 Java 程序,需要将 CSV 文件转换为 Hierarchy XML:
输出应该是这样的:
`<?xml version="1.0" encoding="UTF-8"?>
<UteXmlComuniction xmlns="http://www....../data">
<Client Genaral Data>
<Client>
<pfPg></pfPg>
<name>Arnold</name>
<Family>Bordon</family>
</Client>
<Contract>
<ContractDetail>
<Contract>100020</Contract>
<ContractYear>2019</ContractYear>
</ContractDetail>
</Contract>
</Client Genaral Data>``
但是对于 CSV 文件我们很灵活,我们可以根据需要定义它。我想也许可以这样工作:
"UteXmlComuniction/ClientGeneralData/Client/pfpg", "UteXmlComuniction/ClientGeneralData/Client/name" ,
"UteXmlComuniction/ClientGeneralData/Client/Family" , ...```
这是我们的代码,但它只提供了平面 XML。另外,我无法在 CSV 文件中插入 "/"
字符,因为程序无法接受该字符。
public class XMLCreators {
// Protected Properties
protected DocumentBuilderFactory domFactory = null;
protected DocumentBuilder domBuilder = null;
public XMLCreators() {
try {
domFactory = DocumentBuilderFactory.newInstance();
domBuilder = domFactory.newDocumentBuilder();
} catch (FactoryConfigurationError exp) {
System.err.println(exp.toString());
} catch (ParserConfigurationException exp) {
System.err.println(exp.toString());
} catch (Exception exp) {
System.err.println(exp.toString());
}
}
public int convertFile(String csvFileName, String xmlFileName,
String delimiter) {
int rowsCount = -1;
try {
Document newDoc = domBuilder.newDocument();
// Root element
Element rootElement = newDoc.createElement("XMLCreators");
newDoc.appendChild(rootElement);
// Read csv file
BufferedReader csvReader;
csvReader = new BufferedReader(new FileReader(csvFileName));
int line = 0;
List<String> headers = new ArrayList<String>(5);
String text = null;
while ((text = csvReader.readLine()) != null) {
StringTokenizer st = new StringTokenizer(text, delimiter, false);
String[] rowValues = new String[st.countTokens()];
int index = 0;
while (st.hasMoreTokens()) {
String next = st.nextToken();
rowValues[index++] = next;
}
if (line == 0) { // Header row
for (String col : rowValues) {
headers.add(col);
}
} else { // Data row
rowsCount++;
Element rowElement = newDoc.createElement("row");
rootElement.appendChild(rowElement);
for (int col = 0; col < headers.size(); col++) {
String header = headers.get(col);
String value = null;
if (col < rowValues.length) {
value = rowValues[col];
} else {
// ?? Default value
value = "";
}
Element curElement = newDoc.createElement(header);
curElement.appendChild(newDoc.createTextNode(value));
rowElement.appendChild(curElement);
}
}
line++;
}
ByteArrayOutputStream baos = null;
OutputStreamWriter osw = null;
try {
baos = new ByteArrayOutputStream();
osw = new OutputStreamWriter(baos);
TransformerFactory tranFactory = TransformerFactory.newInstance();
Transformer aTransformer = tranFactory.newTransformer();
aTransformer.setOutputProperty(OutputKeys.INDENT, "yes");
aTransformer.setOutputProperty(OutputKeys.METHOD, "xml");
aTransformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
Source src = new DOMSource(newDoc);
Result result = new StreamResult(osw);
aTransformer.transform(src, result);
osw.flush();
System.out.println(new String(baos.toByteArray()));
} catch (Exception exp) {
exp.printStackTrace();
} finally {
try {
osw.close();
} catch (Exception e) {
}
try {
baos.close();
} catch (Exception e) {
}
}
// Output to console for testing
// Resultt result = new StreamResult(System.out);
} catch (IOException exp) {
System.err.println(exp.toString());
} catch (Exception exp) {
System.err.println(exp.toString());
}
return rowsCount;
// "XLM Document has been created" + rowsCount;
}
}
您对我应该如何修改代码或如何更改我的 CSV 以获得层次结构 XML 有什么建议吗?
最佳答案
csv: pfPg;姓名;家庭;契约(Contract);契约(Contract)年份
有几个用于在 Java 中读取 csv 的库。将值存储在容器中,例如 HashMap 。
然后创建代表您的 xml 结构的 java 类。
class Client {
private String pfPg;
private String name;
private String Family
}
class ClientGenaralData {
private Client client;
private Contract contract;
}
通过编写自定义代码或像推土机这样的映射器来完成从 csv 到 Java 类的映射...然后使用 xml 与 Jackson 或 JAXB 绑定(bind)从 Java 对象创建 xml。
关于java - 使用 JAVA 将 CSV 文件转换为 Hierarchy XML,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/61370034/