scala当中的文件操作和网络请求

def main(args: Array[String]): Unit = {

//注意文件的编码格式，如果编码格式不对，那么读取报错

val file: BufferedSource = Source.fromFile("F:\\files\\file.txt","GBK");

val lines: Iterator[String] = file.getLines()

for(line <- lines){

println(line)

}

//注意关闭文件

file.close()

}

def main(args: Array[String]): Unit = {

val file: BufferedSource = Source.fromFile("F:\\files\\file2.txt","GBK");

val split: Array[String] = file.mkString.split(" ")

println(split.mkString("\t"))

file.close()

}

def main(args: Array[String]): Unit = {

val source: BufferedSource = Source.fromURL("http://www.baidu.com")

val string: String = source.mkString

? ?

println(string)

source.close()

}

def main(args: Array[String]): Unit = {

val writer = new PrintWriter("F:files\\printWriter.txt")

for(i <- 1 to 100){

writer.println(i)

writer.flush()

}

writer.close()

}

def main(args: Array[String]): Unit = {

//控制台交互--老API

print("请输入内容:")

val consoleLine1 = Console.readLine()

println("刚才输入的内容是:" + consoleLine1)

? ?

//控制台交互--新API

print("请输入内容(新API):")

val consoleLine2 = StdIn.readLine()

println("刚才输入的内容是:" + consoleLine2)

}

@SerialVersionUID(1L)

class Person extends Serializable{

override def toString = name + "," + age

? ?

val name = "Nick"

val age = 20

? ?

}

? ?

object PersonMain extends App{

override def main(args: Array[String]): Unit = {

? ?

import java.io.{FileOutputStream, FileInputStream, ObjectOutputStream, ObjectInputStream}

val nick = new Person

val out = new ObjectOutputStream(new FileOutputStream("Nick.obj"))

out.writeObject(nick)

out.close()

? ?

val in = new ObjectInputStream(new FileInputStream("Nick.obj"))

val saveNick = in.readObject()

in.close()

println(saveNick)

}

}

def main(args: Array[String]): Unit = {

import scala.util.matching.Regex

val pattern1 = new Regex("(S|s)cala")

val pattern2 = "(S|s)cala".r

val str = "Scala is scalable and cool"

println((pattern2 findAllIn str).mkString(","))

}