使用Java/Javascript将CSV转换为自定义XML

我想用Java/Javascript将CSV转换成XML

例如，我的CSV文件如下表所示：

---

|ID | OLO| |12345 | TLC|

|12345 | VPN|

|67890 | TLC|

---

我希望有这样一个XML文件：

<?xml version='1.0' encoding='UTF-8'?>
<Custom name="Custom_ListaOLO">
  <Attributes>
    <Map>
      <entry key="12345">
        <value>
          <List>
            <String>TLC</String>
            <String>VPN</String>
          </List>
        </value>
      </entry>
      <entry key="67890">
        <value>
          <List>
            <String>TLC</String>
          </List>
        </value>
      </entry>
    </Map>
  </Attributes>
</Custom>

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或：

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虚拟专用网
您可以通过MOXy实现使用JAXB封送来满足上述要求

JAXB
Java Architecture for XML Binding（JAXB）是一个软件框架，它提供了将Java类映射到XML表示的方法

JAXB封送处理
将java对象转换为xml

MOXy
使开发人员能够处理复杂的XML结构

首先读取csv文件并创建java对象，然后使用jaxb封送和moxy实现将java对象转换为xml

尝试以下解决方案

为xml文件中表示的
和
元素创建两个java pojo类（
Custom
和
Entry
）

Custom.java

import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlRootElement;

import org.eclipse.persistence.oxm.annotations.XmlPath;

@XmlRootElement(name="Custom")
public class Custom {

    private String name;
    private List<Entry> entry;

    public String getName() {
        return name;
    }

    @XmlAttribute
    public void setName(String name) {
        this.name = name;
    }

    public Custom() {
        entry = new ArrayList<Entry>();
    }

    @XmlPath("Attributes/Map/entry")
    public List<Entry> getEntry() {
        return entry;
    }

    public void setEntry(List<Entry> entry) {
        this.entry = entry;
    }
}

inputCSV.csv

ID,OLO
12345,TLC
12345,VPN
67890,TLC

output.xml

<?xml version="1.0" encoding="UTF-8"?>
<Custom name="Custom_ListaOLO">
   <Attributes>
      <Map>
         <entry key="12345">
            <value>
               <List>
                  <String>TLC</String>
                  <String>VPN</String>
               </List>
            </value>
         </entry>
         <entry key="67890">
            <value>
               <List>
                  <String>TLC</String>
               </List>
            </value>
         </entry>
      </Map>
   </Attributes>
</Custom>


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import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;

import org.eclipse.persistence.jaxb.JAXBContextFactory;
import org.eclipse.persistence.jaxb.xmlmodel.ObjectFactory;

public class Demo {

    public static void main(String[] args) throws JAXBException {
        String line;
        String key = null;
        Custom custom = new Custom();
        Entry entry = null;
        int index = 0;

        try {
            BufferedReader br = new BufferedReader(new FileReader("inputCSV.csv")); //get csv file
            while ((line = br.readLine()) != null) {    //get every single line individually in csv file
                if(index > 0){  //skip the column's names (first line of csv file)
                    String[] value = line.split(",");   //collect the comma separated values (ID and OLO) into array
                    if(key == null || !key.equals(value[0])){   //first line of the csv file and when find the new key value, then create new entry
                        if(entry != null){
                            custom.getEntry().add(entry);   //add entry object into entry list of custom
                        }
                        key = value[0]; //assign the key value to variable (String key) for identify the new entry
                        entry = new Entry();    //create a new entry
                        entry.setKey(value[0]); //assign the key value to entry
                        entry.getString().add(value[1]);    //add string value String list of entry with new key
                    }else{
                        entry.getString().add(value[1]);    //add string value String list of entry under the same key
                    }
                }
                index++;
            }
            custom.setName("Custom_ListaOLO");  //set value to name attribute of custom element
            custom.getEntry().add(entry);   //add last entry into entry list of custom
        } catch (IOException e) {
            e.printStackTrace();
        }

        //marshaling with JAXB
        JAXBContext jaxbContext = JAXBContextFactory.createContext(new Class[]{Custom.class, ObjectFactory.class}, null);
        Marshaller marshaller = jaxbContext.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(custom, new File("output.xml")); //generate the output xml file
        marshaller.marshal(custom, System.out);
    }
}

ID,OLO
12345,TLC
12345,VPN
67890,TLC

<?xml version="1.0" encoding="UTF-8"?>
<Custom name="Custom_ListaOLO">
   <Attributes>
      <Map>
         <entry key="12345">
            <value>
               <List>
                  <String>TLC</String>
                  <String>VPN</String>
               </List>
            </value>
         </entry>
         <entry key="67890">
            <value>
               <List>
                  <String>TLC</String>
               </List>
            </value>
         </entry>
      </Map>
   </Attributes>
</Custom>