Java 将 List 转换为 String常见方式

在Java中，将List转换为String的常见方式有以下几种：

1. 使用String.join()方法（Java 8+）:

List<String> list = Arrays.asList("apple", "banana", "cherry");
String result = String.join(", ", list);
System.out.println(result); // 输出: apple, banana, cherry

2. 使用StringBuilder或StringBuffer的append()方法:

List<String> list = Arrays.asList("apple", "banana", "cherry");
StringBuilder sb = new StringBuilder();
for (String s : list) {
    sb.append(s).append(", ");
}
String result = sb.substring(0, sb.length() - 2); // 移除最后的逗号和空格
System.out.println(result); // 输出: apple, banana, cherry

3. 使用Java 8的Streams API:

List<String> list = Arrays.asList("apple", "banana", "cherry");
String result = list.stream().collect(Collectors.joining(", "));
System.out.println(result); // 输出: apple, banana, cherry

4. 使用Apache Commons Lang库的StringUtils.join()方法:

List<String> list = Arrays.asList("apple", "banana", "cherry");
String result = StringUtils.join(list, ", ");
System.out.println(result); // 输出: apple, banana, cherry

5. 使用Google Guava库的Joiner.on()方法:

List<String> list = Arrays.asList("apple", "banana", "cherry");
String result = Joiner.on(", ").join(list);
System.out.println(result); // 输出: apple, banana, cherry

选择哪种方法取决于你的具体需求和对API的偏好。简单性和可读性通常是首要考虑因素。