Java：List转成逗号隔开的字符串

原创于 2025-11-26 10:30:16 发布 · 523 阅读

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方法一：使用Java 8的Stream API和Collectors.joining()方法

import java.util.List;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        List<String> list = List.of("apple", "banana", "cherry");
        String result = list.stream().collect(Collectors.joining(", "));
        System.out.println(result);
    }
}

方法二：使用Java 8的String.join()方法

import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> list = List.of("apple", "banana", "cherry");
        String result = String.join(", ", list);
        System.out.println(result);
    }
}

方法三：使用循环遍历列表并拼接字符串

import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> list = List.of("apple", "banana", "cherry");
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < list.size(); i++) {
            sb.append(list.get(i));
            if (i != list.size() - 1) {
                sb.append(", ");
            }
        }
        String result = sb.toString();
        System.out.println(result);
    }
}

方法四：使用Java 8的StringJoiner类

import java.util.List;
import java.util.StringJoiner;

public class Main {
    public static void main(String[] args) {
        List<String> list = List.of("apple", "banana", "cherry");
        StringJoiner stringJoiner = new StringJoiner(", ");
        for (String element : list) {
            stringJoiner.add(element);
        }
        String result = stringJoiner.toString();
        System.out.println(result);
    }
}