package com.mstf.ui;

import java.io.*;

public class TestWriter

{

public static void main(String args[]){

//PrintWriter做過濾流+FileWriter

//doFilter1();

//2、PrintWriter做過濾流+OutputStreamWriter

//doFilter2();

//3、PrintWriter可以作為節點流

//doNode();

//4、PrintWriter可以進行橋轉換，接受一個OutputStream對象

doBridge();

}

//1、PrintWriter做過濾流+FileWriter

public static void doFilter1(){

FileWriter fw = null;

PrintWriter pw = null;

try{

//創建字符流

fw = new FileWriter("newPoem.txt");

//封裝字符流的過濾流

pw = new PrintWriter(fw);

//文件寫入

pw.println("陽關萬里道，");

pw.println("不見一人歸。");

pw.println("惟有河邊雁，");

pw.println("秋來南向飛。");

}catch(IOException e){

e.printStackTrace();

}finally{

//關閉外層流

if(pw != null){

pw.close();

}

}

}

//2、PrintWriter做過濾流+OutputStreamWriter

public static void doFilter2(){

FileOutputStream fos = null;

OutputStreamWriter osw = null;

PrintWriter pw = null;

try

{

//創建字節流

fos = new FileOutputStream("newPoem.txt");

//通過橋連接，把字節流轉變為字符流，并指定編碼格式

osw = new OutputStreamWriter(fos,"UTF-8");//寫入文件時指定編碼格式

//封裝字符流的過濾流

pw = new PrintWriter(osw);

//文件寫入

pw.println("陽關萬里道，");

pw.println("不見一人歸。");

pw.println("惟有河邊雁，");

pw.println("秋來南向飛。");

}

catch (FileNotFoundException e)

{

e.printStackTrace();

}catch(UnsupportedEncodingException e){

e.printStackTrace();

}finally{

//關閉外層流

if(pw != null){

pw.close();

}

}

}

//3、PrintWriter可以作為節點流,構造器中可以接受File對象或者文件名

public static void doNode(){

PrintWriter pw = null;

try

{

//直接創建字符節點流，并輸出

pw = new PrintWriter("newPoem.txt");

pw.println("陽關萬里道，");

pw.println("不見一人歸。");

pw.println("惟有河邊雁，");

pw.println("秋來南向飛。");

}

catch (FileNotFoundException e)

{

e.printStackTrace();

}finally{

//關閉外層流

if(pw != null){

pw.close();

}

}

}

//4、PrintWriter可以進行橋轉換，接受一個outputStream對象，不能指定編碼方式

public static void doBridge(){

FileOutputStream fos = null;

PrintWriter pw = null;

try

{

fos = new FileOutputStream("newPoem.txt");

pw = new PrintWriter(fos);

//文件寫入

pw.println("陽關萬里道，");

pw.println("不見一人歸。");

pw.println("惟有河邊雁，");

pw.println("秋來南向飛。");

}

catch (FileNotFoundException e)

{

e.printStackTrace();

}finally{

//關閉外層流

if(pw != null){

pw.close();

}

}

}

}