scala实现设计模式之外观模式

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package com.linewell.modeldesgin.patternimport java.io.{FileNotFoundException, IOException}import scala.io.Source/** * 读文件，子系统类 * Created by ctao on 2015/8/28. */class FileReader {    def read(fileNameSrc: String): String = {        println("读取文件，获取明文：")        /**         * 读入文件         */        var target = ""        try {            for(s<- Source.fromFile(fileNameSrc)){                target += s.toString            }        } catch {            case io: IOException => io.printStackTrace()            case noFile: FileNotFoundException => noFile.printStackTrace()        }        target    }}

package com.linewell.modeldesgin.pattern/** * 加密文件，子系统类 * Created by ctao on 2015/8/28. */class CipherMachine {    def encrypt(plainText: String): String = {        println("数据加密，将明文转化为密文：")        var es = ""        for (i <- 0 until plainText.length) {            es += String.valueOf(plainText.charAt(i) % 7)        }        print(es)        es    }}

package com.linewell.modeldesgin.patternimport java.io.{FileNotFoundException, IOException, PrintWriter}/** * 写文件，子系统类 * Created by ctao on 2015/8/28. */class FileWriter {    def write(encryptStr: String, fileNameDes: String): Unit = {        print("保存密文，写入文件：")        try {            val out = new PrintWriter(fileNameDes)            out.print(encryptStr)            out.close()        } catch {            case io: IOException => io.printStackTrace()            case noFile: FileNotFoundException => noFile.printStackTrace()            case _ => println("其他异常")        }    }}

package com.linewell.modeldesgin.pattern/** *加密外观类 * Created by ctao on 2015/8/28. */class EncryptFacade {    private val fileReader = new FileReader    private val cipherMachine = new CipherMachine    private val fileWriter = new FileWriter    def fileEncrypt(fileNameSrc: String, fileNameDes: String): Unit = {        fileWriter.write(cipherMachine.encrypt(fileReader.read(fileNameSrc)), fileNameDes)    }}

package com.linewell.modeldesgin.pattern/** * 测试客户端 * Created by ctao on 2015/8/28. */object Client extends App {    val encryptFacade = new EncryptFacade    encryptFacade.fileEncrypt("hello", "des")}

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