Java ——流(Stream)、文件(File)和IO

public static void main(String[] args) {
        try {
            //1、创建一个空的文件
            File file = new File("abc.txt");
            if (!file.exists()) {
                file.createNewFile();
            }
            //2、准备数据
            StringBuffer data = new StringBuffer();
        
            for(int i = 0;i<8000;i++) {
                data.append(UUID.randomUUID().toString());
            }
            data.append("4321*");
            
            System.out.println(data);
            
            //往文件中写入数据
            FileWriter writer = new FileWriter(file);
            writer.write(data.toString());
            writer.flush();//刷新
            //释放资源
            writer.close();
        } catch (Exception e) {
            System.out.println("haha");
        }
    }