003 写入文本文件

提供三个写入文本文件的函数。

public static boolean writeStringToTextFile(String content, String filePath, Charset charset)

 1 public static boolean writeStringToTextFile(String content, String filePath, Charset charset){
 2     Path file = Paths.get(filePath);
 3     try {
 4         Files.writeString(file, content, charset);
 5         return true;
 6     }catch (IOException err){
 7         err.printStackTrace();
 8         return false;
 9     }
10 }

public static boolean writeStringListToTextFile(List<String> lines, String filePath, Charset charset)

 1 // 写入时会在每个字符串后自动添加换行符。
 2 public static boolean writeStringListToTextFile(List<String> lines, String filePath, Charset charset){
 3     Path file = Paths.get(filePath);
 4     try {
 5         Files.write(file, lines, charset);
 6         return true;
 7     }catch (IOException err){
 8         err.printStackTrace();
 9         return false;
10     }
11 }

public static boolean writeStringStreamToTextFile(Stream<String> lines, String filePath, Charset charset)

 1 // 写入时在每个字符串后添加换行符。
 2 public static boolean writeStringStreamToTextFile(Stream<String> lines, String filePath, Charset charset){
 3     Path file = Paths.get(filePath);
 4     try {
 5         BufferedWriter bwriter = Files.newBufferedWriter(file, charset);
 6         lines.forEach(line->{
 7             try {
 8                 bwriter.write(line);
 9                 bwriter.newLine();
10             }catch (IOException err){
11                 err.printStackTrace();
12             }
13         });
14         bwriter.close();
15         return true;
16     }catch (IOException err){
17         err.printStackTrace();
18         return false;
19     }
20 }

测试代码

 1 public static void main(String[] args) {
 2     String file = "d:/mytest.txt";
 3     String s = """
 4             窗前明月光；
 5             疑是地上霜。
 6             举头望明月；
 7             低头思故乡。
 8             """;
 9     writeStringToTextFile(s, file, StandardCharsets.UTF_8);
10     List<String> dataList = List.of(
11             "窗前明月光；",
12             "疑是地上霜。",
13             "举头望明月；",
14             "低头思故乡。"
15             );
16     writeStringListToTextFile(dataList, file, StandardCharsets.UTF_8);
17     writeStringStreamToTextFile(dataList.stream(), file, StandardCharsets.UTF_8);
18 }