List<String> list= Arrays.list("A", "B", "C");
String result = String.join(", ", list); // A, B, C

// 兼容性好（全版本Java）
List<String> list= Arrays.list("A", "B", "C");
StringBuilder sb = new StringBuilder();
for (String s : list) {
    if (sb.length() > 0) {
        sb.append(" | ");
    }
    sb.append(s);
}
String result = sb.toString(); // A | B | C

// 支持處理復(fù)雜轉(zhuǎn)換
List<String> list= Arrays.list("A", "B", "C");
String result = list.stream()
        .map(String::toLowerCase) // 元素處理示例
        .collect(Collectors.joining(" - ")); // a - b - c

List<String> list= Arrays.list("A", "B", "C");

// 需引入依賴 <commons-lang3>
String result = StringUtils.join(list, " \ "); // A \ B \ C


// 需引入依賴 <Guava>
String result = Joiner.on(", ").skipNulls().join(list); // 自動(dòng)跳null

// 添加前綴后綴
String jsonStyle = "[ " + String.join(", ", list) + " ]";
// 輸出：[ A, B, C ]

// 動(dòng)態(tài)生成帶序號(hào)列表
StringBuilder sb = new StringBuilder();
for (int i = 0; i < sjzjList.size(); i++) {
    sb.append((i+1)+". "+sjzjList.get(i)+"\n");
}
// 輸出：1. A\n2. B\n3. C

// 多級列表轉(zhuǎn)換
List<List<String>> multiList = Arrays.asList(
    Arrays.asList("A1", "A2"),
    Arrays.asList("B1", "B2")
);

String nestedResult = multiList.stream()
    .map(subList -> "(" + String.join("/", subList) + ")")
    .collect(Collectors.joining(" → ")); 
// 輸出：(A1/A2) → (B1/B2)

// 使用HTML轉(zhuǎn)義（示例）
String htmlSafe = list.stream()
    .map(s -> StringEscapeUtils.escapeHtml4(s))  // commons-text
    .collect(Collectors.joining("<br/>"));

// 處理逗號(hào)場景
String csv = sjzjList.stream()
    .map(s -> "\"" + s.replace("\"", "\"\"") + "\"") // 雙引號(hào)轉(zhuǎn)義
    .collect(Collectors.joining(","));