Java - 将管道和逗号分隔的文件转换为 xml

Posted 2023-04-13

【中文标题】Java - 将管道和逗号分隔的文件转换为 xml

【英文标题】：Java - convert pipe and comma delimited file into xml

【发布时间】：2015-09-25 15:59:55

【问题描述】：

我想将管道和逗号都分隔的文件转换为 xml。我要转换的分隔文件格式为：

   UUID  |  Location |   Name  |  Age, UUID  |    Location   |   Name   | Age
   123   | Bangalore |  Paras  |  23, 234    |    Bangalore  | Varun    |  25

我希望将其转换为：

<data>
  <UUID>123</UUID> 
  <location>Bangalore</location>
  <name> Paras  </name>
  <age> 23</age>
</data>
<data>
  <UUID>234</UUID> 
  <location>Bangalore</location>
  <name> Paras  </name>
  <age> 23</age>
</data>

【问题讨论】：

你有什么问题？

java中有什么方法可以做这样的事情，我知道将csv转换为xml，但我的文件包含两者。

请将其添加到您的帖子中，并向我们展示您的尝试并解释失败的原因。

读取文件并使用一些xml库来编写xml文件。我相信您首选的搜索引擎会为您提供帮助。

【参考方案1】：

您需要双重解析您的输入字符串。下面的示例将帮助您开始。

import java.io.BufferedOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.PrettyPrintWriter;
import com.thoughtworks.xstream.io.xml.StaxDriver;



class Data 
    String UUID;
    String location;
    String name;
    String age;

    public Data(String[] elements)
        int i = 0;
        UUID = elements[i++].trim();
        location = elements[i++].trim();
        name  = elements[i++].trim();
        age = elements[i++].trim();
    

和转换器

public class Convert 

    static final String[] headers = "UUID","location","name","age";


    public static void main(String[] args) throws IOException 

        List<Data> dataList = new ArrayList<Data>();
        LineNumberReader r = new LineNumberReader(new FileReader("test.csv"));

        String line = r.readLine();
        while(line != null)
            String[] dataArray = line.split(",");
            for(String record:dataArray)
                String[] elements = record.split("\\|");
                Data data = new Data(elements);
                //If you dont want to accumulate data then you can stream xml out. 
                dataList.add(data);
            
            line = r.readLine();
        
        r.close();

        // now use your favorite xml library to stream out. I use xstream. in your case even direct constructing xml seems ok too. 
        XStream xstream = new XStream(new StaxDriver());
        xstream.alias("data", Data.class);
        xstream.toXML(dataList, System.out);

        //if you want formatted xml then use PrettyPrintWriter..
/*      BufferedOutputStream stdout = new BufferedOutputStream(System.out);
        PrettyPrintWriter p = new PrettyPrintWriter(new OutputStreamWriter(stdout));
        xstream.marshal(dataList, p);
*/      
    

我的示例 csv 文件是

123|    Bangalore  |  Paras  |  23  , 234    |    Bangalore  | Varun    |  25
456|    Mumbai  |  xyz  |  30  , 999    |    Ahmedabad  | abc    |  28

输出是

<list>
  <data>
    <UUID>123</UUID>
    <location>Bangalore</location>
    <name>Paras</name>
    <age>23</age>
  </data>
  <data>
    <UUID>234</UUID>
    <location>Bangalore</location>
    <name>Varun</name>
    <age>25</age>
  </data>
  <data>
    <UUID>456</UUID>
    <location>Mumbai</location>
    <name>xyz</name>
    <age>30</age>
  </data>
  <data>
    <UUID>999</UUID>
    <location>Ahmedabad</location>
    <name>abc</name>
    <age>28</age>
  </data>
</list>

【讨论】：

并添加任何验证（如 null 等）。