BufferedWriter与BufferedRead --------------------------Test2

 package com.test;

 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 /**
  * 将两个文档合并为一个文档，需要注意要读取的文件的编码格式与java文件的编码格式相同
  * @author Administrator
  *
  */
 public class Demo3 {

     public static void main(String[] args) {
         // TODO Auto-generated method stub
         Readwrite111 readwrite111 = new Readwrite111();
         readwrite111.copyDate();

     }

 }

 class Readwrite111 {
     public static void copyDate() {
         BufferedReader bufferedReader = null;
         BufferedReader bufferedReader2 = null;
         BufferedWriter bufferedWriter = null;
         try {
             //将要进行合并的文档
             File file = new File("D://userMsg//userinfo.txt");
             File file2 = new File("D://userMsg//userinfo11.txt");
             //保存读取到的文档内容
             List<String> list = new ArrayList<String>();
             String str = null;
             //开始进行第一个文档的读取
             FileReader fileReader = new FileReader(file);
             bufferedReader = new BufferedReader(fileReader);
             while((str = bufferedReader.readLine())!= null){
                 list.add(str);

             }
             //开始进行第二个文档的读取
             FileReader fileReader2 = new FileReader(file2);
             bufferedReader2 = new BufferedReader(fileReader2);
             while((str = bufferedReader2.readLine())!=null){
                 list.add(str);

             }
             //将要进行合并的文档，并此将结果写入到此文档中
             File file3 = new File("D://userMsg//userinfo22.txt");
             FileWriter fileWriter = new FileWriter(file3);
             bufferedWriter = new BufferedWriter(fileWriter);
             for(String s : list){
                 bufferedWriter.write(s);
                 //写入数据是进行换行
                 bufferedWriter.write("\r\n");
                 System.out.println(s);
             }
             bufferedWriter.flush();
         } catch (FileNotFoundException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } catch (IOException e){
             e.printStackTrace();
         }finally{
             try {
                 if(bufferedReader!=null){
                     bufferedReader.close();
                 }
                 if(bufferedReader2!=null){
                     bufferedReader2.close();
                 }
                 if(bufferedWriter!=null){
                     bufferedWriter.close();
                 }
             } catch (IOException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }

     }
 }