Java IO 输入输出流实例解释

package IO;
/*
 * Java In Out 输入输出流
 * Date:2014.02.21
 * Author:璀若星辰
 *reference
 * */
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;


/*主要操作的内容：
 * 1.字节流： 图片，     2.字符流  （字符文件 .html .java .txt）
 *
 *
 * */
public class testIO {
	//读 字符输入流
	public static List
  
   testCharInput() throws Exception {
		FileInputStream fis = new FileInputStream("D:/1.txt");
		try {
			InputStreamReader isr = new InputStreamReader(fis, "gb2312");
			try{
				BufferedReader br = new BufferedReader(isr);
				try{
					List
   
     all = new ArrayList
    
     (); String temp = br.readLine(); while(temp!=null) { System.out.println("temp="+temp); all.add(temp); System.out.println("all= "+all); temp= br.readLine(); } return all; }finally{ br.close(); } }finally{ isr.close(); } } finally{ fis.close(); } } // 读 字节流 public static void testByteInputStream() throws Exception { FileInputStream fis = new FileInputStream("D:/1.txt"); try { BufferedInputStream bis = new BufferedInputStream(fis); try { byte[] bs = new byte[1024]; //1024的长度可改 while (bis.read(bs, 0, 1024) != -1) { System.out.print("bs="+new String(bs)); } } finally { bis.close(); } } finally { fis.close(); } } //写 字符流 public static void testCharOutput(List
     





      list) throws Exception{ FileOutputStream fos = new FileOutputStream("d:/1.txt"); try{ OutputStreamWriter osw = new OutputStreamWriter(fos,"utf-8");//文件的编码 try{ BufferedWriter bw = new BufferedWriter(osw); try{ for(String line:list){ bw.write(line); bw.newLine();//使用newLine()换行 \n } System.out.println("success"); }finally{ bw.close(); } }finally{ osw.close(); } }finally{ fos.close(); } } public static void main(String[] args) throws Exception { //testIO.testCharInput(); //testIO.testByteInputStream(); ArrayList
      
        list = new ArrayList
       
        (); list.add("Happy"); list.add("Boy"); testIO.testCharOutput(list); testIO.testByteInputStream(); } //写入内容时不想删除原来的文本，可以先读出来保存下来，然后和新内容一起写入文本，此处不再赘述 }
Java IO 输入输出流 实例解释
