Java8中List转换String字符串几种方式

@Test
public void ListToString() {
        List<String> list = Arrays.asList("张三", "李四", "王五", "赵六");
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < list.size(); i++) {
            builder.append(list.get(i));
            builder.append(",");
        }
        String substring = builder.substring(0, builder.length() - 1);
        System.out.println("String.join() 转化后的字符串 : " + substring);
    }
// 输出
String.join() 转化后的字符串 : 张三,李四,王五,赵六

@Test
public void ListToString() {
    // 构造list
    List<String> list = Arrays.asList("张三", "李四", "王五", "赵六");
    String str = String.join(",", list);// StringUtils.join(list, ",");
    System.out.println("String.join() 转化后的字符串 : " + str);
 }
// 输出
String.join() 转化后的字符串 : 张三,李四,王五,赵六

@Test
public void ListToString() {
    // 构造list
    List<String> list = Arrays.asList("张三", "李四", "王五", "赵六");
    // 以逗号分隔，带前缀后缀
    String str1 = list.stream().collect(Collectors.joining(",", "{", "}"));
    System.out.println("Collectors.joining 带前缀后缀 : " + str1);
    // 以@分隔，不带前缀后缀
    String str2 = list.stream().collect(Collectors.joining("@"));
    System.out.println("Collectors.joining 不带前缀后缀 : " + str2);
}
// 输出
Collectors.joining 带前缀后缀 : {张三,李四,王五,赵六}
Collectors.joining 不带前缀后缀 : 张三@李四@王五@赵六