Java实现csv文件转xml

一、需求

        从csv文件读取内容，写入到xml文件中去

二、实现

        第一步先从csv读取内容

        第二步把读取的内容写到xml

       注意：读取csv文件的内容是利用的hutool框架，所以要在pom文件加入依赖

     cn.hutool
     hutool-all
     4.1.19

代码如下：

package com.lsl.mylsl.controller;

import cn.hutool.core.io.FileUtil;
import cn.hutool.core.text.csv.CsvData;
import cn.hutool.core.text.csv.CsvReader;
import cn.hutool.core.text.csv.CsvRow;
import cn.hutool.core.text.csv.CsvUtil;
import cn.hutool.core.util.CharsetUtil;
import com.lsl.mylsl.module.Student;
import org.w3c.dom.document;
import org.w3c.dom.Element;

import javax.xml.parsers.documentBuilder;
import javax.xml.parsers.documentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class MyTest {



    public static void main(String[] args) {

        List studentList = readCsv();
        createXml(studentList);

    }

    
    public static List readCsv() {
        CsvReader reader = CsvUtil.getReader();
        //从文件中读取CSV数据
        CsvData data = reader.read(FileUtil.file("C:\Users\perfe\Desktop\list.csv"), CharsetUtil.CHARSET_GBK);
        List rows = data.getRows();

        for (CsvRow row : rows) {
            List rawList = row.getRawList();
            System.out.println(rawList);
        }
        //csv文件的列依次是id,stuName,age,addr
        List studentList = new ArrayList<>();
        for (int i = 1; i < rows.size(); i++) {
            CsvRow row = rows.get(i);
            Student stu = new Student();
            List rawList = row.getRawList();
            stu.setId(Integer.valueOf(rawList.get(0)));
            stu.setStuName(rawList.get(1));
            stu.setAge(Integer.valueOf(rawList.get(2)));
            stu.setAddr(rawList.get(3));
            studentList.add(stu);
        }

        System.out.println(studentList);
        return studentList;
    }


    
    public static void createXml(List studentList){
        try {
            // 创建解析器工厂
            documentBuilderFactory factory = documentBuilderFactory.newInstance();
            documentBuilder db = factory.newdocumentBuilder();
            document document = db.newdocument();
            // 不显示standalone="no"
            document.setXmlStandalone(true);
            Element students = document.createElement("students");

            for (Student stu : studentList){
                Element student = document.createElement("student");
                student.setAttribute("flag", "true");

                Element id = document.createElement("id");
                id.setTextContent(stu.getId()+"");
                student.appendChild(id);

                Element name = document.createElement("name");
                name.setTextContent(stu.getStuName());
                student.appendChild(name);

                Element age = document.createElement("age");
                age.setTextContent(stu.getAge()+"");
                student.appendChild(age);

                Element addr = document.createElement("addr");
                addr.setTextContent(stu.getAddr());
                student.appendChild(addr);

                students.appendChild(student);

            }

            // 将students节点（已包含student）添加到dom树中
            document.appendChild(students);

            // 创建TransformerFactory对象
            TransformerFactory tff = TransformerFactory.newInstance();
            // 创建 Transformer对象
            Transformer tf = tff.newTransformer();

            // 输出内容是否使用换行
            tf.setOutputProperty(OutputKeys.INDENT, "yes");
            // 创建xml文件并写入内容
            tf.transform(new DOMSource(document), new StreamResult(new File("D:\Download\students.xml")));
            System.out.println("生成student.xml成功");
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("生成student.xml失败");
        }
    }




//    public static void filter(List list){
//
//        for (int m=list.size()-1;m==0;m--){
//            if (!"a".equals(list.get(m))){
//                list.remove(m);
//            }
//        }
//
//    }
//
//    public byte[] blobToByte(Blob blob) throws Exception {
//        byte[] bytes = null;
//        try {
//            InputStream in=blob.getBinaryStream();
//            BufferedInputStream inBuffered = new BufferedInputStream(in);
//            ByteArrayOutputStream out = new ByteArrayOutputStream(1024);
//            byte[] temp = new byte[1024];
//            int size = 0;
//            while ((size = inBuffered.read(temp)) != -1) {
//                out.write(temp, 0, size);
//            }
//            inBuffered.close();
//            in.close();
//            bytes = out.toByteArray();
//        } catch(Exception ex){
//            ex.printStackTrace();
//        }
//        return bytes;
//    }

}

生成截图如下：