为CsvMapper和CsvSchema添加自定义标头

import com.fasterxml.jackson.dataformat.csv.CsvMapper;
import com.fasterxml.jackson.dataformat.csv.CsvSchema;

import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;

public class CsvExample {
    public static void main(String[] args) throws IOException {
        // 创建CsvMapper实例
        CsvMapper csvMapper = new CsvMapper();

        // 定义自定义标头
        List<String> headers = Arrays.asList("ID", "Name", "Age", "Email");

        // 创建CsvSchema实例，并设置自定义标头
        CsvSchema schema = CsvSchema.emptySchema().withHeader(headers.toArray(new String[0]));

        // 准备要写入的数据
        List<Person> people = Arrays.asList(
                new Person(1, "Alice", 30, "alice@example.com"),
                new Person(2, "Bob", 25, "bob@example.com")
        );

        // 将数据写入CSV文件
        csvMapper.writer(schema).writeValue(new File("people.csv"), people);
    }
}

class Person {
    private int id;
    private String name;
    private int age;
    private String email;

    // 构造函数、getter和setter省略
    public Person(int id, String name, int age, String email) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.email = email;
    }

    // Getters and Setters
    public int getId() { return id; }
    public void setId(int id) { this.id = id; }
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public int getAge() { return age; }
    public void setAge(int age) { this.age = age; }
    public String getEmail() { return email; }
    public void setEmail(String email) { this.email = email; }
}

CsvSchema schema = CsvSchema.emptySchema().withHeader(headers.toArray(new String[0]));
csvMapper.writer(schema).writeValue(new File("people.csv"), people);