scala读写文件 comparing values of types Unit and Int using `!=' will always yield true
由于scala没有对写入文件的支持,所以写文件时通常借助java进行IO操作
1 //方式一(小文件)
2
3 /* val s1 = Source.fromFile("D:\\inputword\\hello.txt","GBK");
4 val buffer = s1.toList.toArray
5
6 val des = new PrintWriter("C:\\Users\\Administrator\\Desktop\\scalatest.txt");
7
8 des.write(buffer,0,buffer.length);
9 des.flush();
10 des.close();
11 s1.close();
12 */
13
14 //方式二(大文件)
15 val s2 = Source.fromFile("C:\\Users\\Administrator\\Desktop\\log.data", "UTF-8");
16
17 val buffer = new Array[Char](1024);
18 val des = new PrintWriter("C:\\Users\\Administrator\\Desktop\\scalatest.txt");
19
20 val reader = s2.reader();
21
22 var count: Int = 0;
23
24 while ({ count = reader.read(buffer); count } != -1) {
25 des.write(buffer, 0, buffer.length);
26 }
27
28 //错误(comparing values of types Unit and Int using `!=' will always yield true),在java中这么写没问题,但在scala中赋值过程本身返回的是Unit,如果你想这么用,参考上面的while循环,使用赋值语句块即可
29 /*while((count = reader.read(buffer)) != -1) {
30
31 }*/
32
33 des.close();
34 des.flush();
35 s2.close();
