Question

我想知道是否有一种可接受的方法可以将管道分隔的文本文件转换为Java中的XML。我想要转换的分隔文件格式为：

RefNo   |    Location   |   Name  |  Age
123     | North America |  Steve  |  32

我希望将其转换为：

<data>
    <RefNo>123</RefNo> 
    <location>North America</location>
    <name> Steve </name>
    <age> 32 </age>
</data>

Answer 1

以下是您的问题的一些答案，但首先您应该用逗号替换管道分隔符，因为它是CSV到XML。

您可以使用s.replaceAll("|",",")课程中的String并按照以下说明进行操作：

Conversion of CSV to XML with JAVA

Java lib or app to convert CSV to XML file?

Answer 2

运行此处给出的XSLT转换，或根据需要进行调整：

http://andrewjwelch.com/code/xslt/csv/csv-to-xml_v2.html

Answer 3

我找到了另一种将CSV转换为XML的方法....

import java.io.*;
import java.util.*;
import org.w3c.dom.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
public class CSV2XML {
// Protected Properties
    protected DocumentBuilderFactory domFactory = null;
    protected DocumentBuilder domBuilder = null;
// CTOR
    public CSV2XML()
    {
        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)
    {
        int rowsCount = -1;
        try
        {
            Document newDoc = domBuilder.newDocument();
// Root element
            Element rootElement = newDoc.createElement("CSV2XML");
            newDoc.appendChild(rootElement);

// Read comma seperated file

            BufferedReader csvReader;
            csvFileName = "C:\\frnds.csv";
            csvReader = new BufferedReader(new FileReader(csvFileName));
            int fieldCount = 0;
            String[] csvFields = null;
            StringTokenizer stringTokenizer = null;
// Assumption: first line in CSV file is column/field  names
// As the column names are used to name the elements in the XML file,
// avoid using spaces/any other characters not suitable   for XML element naming

            String curLine = csvReader.readLine();
            if(curLine != null)
            {
                stringTokenizer = new StringTokenizer(curLine, ",");
                fieldCount = stringTokenizer.countTokens();
                if(fieldCount > 0)
                {
                    csvFields = new String[fieldCount];
                    int i=0;
                    while(stringTokenizer.hasMoreElements())
                        csvFields[i++] =
                                String.valueOf(stringTokenizer.nextElement());
                }
            }
// Now we know the columns, Let's now read data row lines
            while((curLine = csvReader.readLine()) != null)
            {
                stringTokenizer = new StringTokenizer(curLine, ",");
                fieldCount = stringTokenizer.countTokens();
                if(fieldCount > 0)
                {
                    Element rowElement = newDoc.createElement("row");
                    int i=0;
                    while(stringTokenizer.hasMoreElements())
                    {
                        try
                        {
                            String curValue =
                                    String.valueOf(stringTokenizer.nextElement());
                            Element curElement =
                                    newDoc.createElement(csvFields[i++]);
                            curElement.appendChild(newDoc.createTextNode(curValue));
                            rowElement.appendChild(curElement);
                        }
                        catch(Exception exp)
                        {
                        }
                    }
                    rootElement.appendChild(rowElement);
                    rowsCount++;
                }
            }
            csvReader.close();
// Save the document to the disk file
            TransformerFactory tranFactory = TransformerFactory.newInstance();
            Transformer aTransformer = tranFactory.newTransformer();
            Source src = new DOMSource(newDoc);
            xmlFileName = "C:\\stest.xml";
            Result dest = new StreamResult(new File(xmlFileName));
            aTransformer.transform(src, dest);
            rowsCount++;
        }
        catch(IOException exp)
        {
            System.err.println(exp.toString());
        }
        catch(Exception exp)
        {
            System.err.println(exp.toString());
        }
        return rowsCount;
    }
    public static void main(String[] args)
    {
        try
        {
            args = new String[] {"C:\\frnds.csv", "C:\\stest.xml"};
            if(args.length != 2)
            {
                System.out.println("Usage: java CSV2XML <inputCSVFile> <outputXMLFile>");
                return;
            }
        }
        catch(Exception exp)
        {
            System.err.println(exp.toString());
        }
        try
        {
            CSV2XML csvConverter = new CSV2XML();
            int rowsCount = csvConverter.convertFile(args[0], args[1]);
            if(rowsCount >= 0)
            {
                System.out.println("CSV File '" + args[0] + "' successfully converted to XML File '"+ args[1] + "'\n" + "(" + String.valueOf(rowsCount) + " rows)");
            }
            else
            {
                System.out.println("Error while converting input CSV  File '" + args[0] + "' to output XML File '"+ args[1] + "'");
            }
        }
        catch(Exception exp)
        {
            System.err.println(exp.toString());
        }
    }
}

Java - 将管道分隔的文本文件转换为XML

3 个答案: