使用Apache Common CSV讀寫CSV檔案

jar包下載下傳位址：​​http://commons.apache.org/proper/commons-csv/​​，點選Download進行下載下傳！

示例直接看代碼吧：

我們首先定義一個Student的Bean：

class Student {
    public Student() {

    }
    public Student(String id, String name, String gender, String major) {
        super();
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.major = major;
    }

    private String id;
    private String name;
    private String gender;
    private String major;

    public String getID() {
        return id;
    }
    public void setID(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getGender() {
        return gender;
    }
    public void setGender(String gender) {
        this.gender = gender;
    }
    public String getMajor() {
        return major;
    }
    public void setMajor(String major) {
        this.major = major;
    }

    @Override
    public String toString() {
        return id + ',' + name + ',' + gender + ','      

import java.io.FileReader;
import java.io.FileWriter;
import java.io.Reader;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVPrinter;
import org.apache.commons.csv.CSVRecord;

public class CSVDemo {
    public static void main(String[] arg) {
        final String[] FILE_HEADER = {"ID","Name","Gender","Major"};
        final String FILE_NAME = "student.csv";

        Student stuTZY = new Student("001", "譚振宇", "男", "GIS");
        Student stuZJL = new Student("002", "周傑倫", "男", "音樂");
        List<Student> students = new ArrayList<>();
        students.add(stuTZY);
        students.add(stuZJL);

        // 這裡顯式地配置一下CSV檔案的Header，然後設定跳過Header（要不然讀的時候會把頭也當成一條記錄）
        CSVFormat format = CSVFormat.DEFAULT.withHeader(FILE_HEADER).withSkipHeaderRecord();

        // 這是寫入CSV的代碼
        try(Writer out = new FileWriter(FILE_NAME);
            CSVPrinter printer = new CSVPrinter(out, format)) {
            for (Student student : students) {
                List<String> records = new ArrayList<>();
                records.add(student.getID());
                records.add(student.getName());
                records.add(student.getGender());
                records.add(student.getMajor());
                printer.printRecord(records);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        // 這是從上面寫入的檔案中讀出資料的代碼
        try(Reader in = new FileReader(FILE_NAME)) {
            Iterable<CSVRecord> records = format.parse(in);
            String strID;
            String strName;
            for (CSVRecord record : records) {
                strID = record.get("ID");
                strName = record.get("Name");
                System.out.println(strID + " " + strName);
            }
        } catch (Exception e) {
            e.printStackTrace();      

001 譚振宇
002 周傑倫