1 import  java.io.BufferedReader;
 2 import  java.io.BufferedWriter;
 3 import  java.io.File;
 4 import  java.io.FileReader;
 5 import  java.io.FileWriter;
 6 import  java.io.IOException;
 7
 8 public  class  ReadTextFile {
 9     public  BufferedReader bufread;
10     public  BufferedWriter bufwriter;
11     File writefile;
12     String filepath, filecontent, read;
13     String readContent  =  "" ;
14     // 从文本文件中读取内容
15      public  String readfile(String path)
16       {
17          try    {
18            filepath  =  path;  // 得到文本文件的路径
19             File file  =   new  File(filepath);
20            FileReader fileread  =   new  FileReader(file);
21            bufread  =   new  BufferedReader(fileread);
22              while  ((read  =  bufread.readLine())  !=   null )   {
23                read  =  read + " \r\n " ;        //读取的每一行都加了换行符
24                readContent  =  readContent  +  read;
25            }
26         }   catch  (Exception d)   {
27            System.out.println(d.getMessage());
28        }
29         return  readContent;  // 返回从文本文件中读取内容
30     }
31     public void writeFile(String path)   {
32
33         try {
34             BufferedWriter writer = new BufferedWriter(new FileWriter(path)); // 如果文本文件不存在则创建它
35             for(int i=0;i<256;i++){
36                 for(int j=0;j<7;j++){
37
38                     writer.write(Math.random()+"    ");
39                 }
40                writer.newLine();
41             }
42              //使用缓冲区中的方法，将数据刷新到目的地文件中去。
43              writer.flush();
44              //关闭缓冲区,同时关闭了writer流对象
45              writer.close();
46           }catch (IOException e) {
47          // TODO Auto-generated catch block
48             e.printStackTrace();
49           }
50     }
51
52
53
54      public   static   void  main(String[] args)  throws  Exception   {
55        ReadTextFile parse  =   new  ReadTextFile();
56        // 写文件
57        parse.writeFile( "D:/radar.txt");
58        //读文件(主要实现将整个文本读取出来，或读取文件函数返回字符串类型，或将每一行读取后放入全局字符串数组中)
59        String filecontent  =  parse.readfile( "D:/radar.txt" );
60
61        System.out.println(filecontent);
62
63
64     }
65 }