一、Java讀取文件
案例1：讀取D盤的1.txt文件
編碼：
1 File file = new File("D:/1.txt");
2 FileReader fr = new FileReader(file);
3 BufferedReader bf = new BufferedReader(fr);
4 StringBuffer sbuffer = new StringBuffer();
5 String temp = null;
6 while((temp = bf.readLine()) !=null){
7 sbuffer.append(temp+"\n");
8 }
9 System.out.println(sbuffer.toString());
10
11 System.out.println();
結果：
二、寫入文件
案例：講D盤中的1.txt文件內容寫入D盤一個2.txt文件。
編碼：
1 File file = new File("D:/1.txt");
2 FileReader fr = new FileReader(file);
3 BufferedReader bf = new BufferedReader(fr);
4 StringBuffer sbuffer = new StringBuffer();
5 String temp = null;
6 while((temp = bf.readLine()) !=null){
7 sbuffer.append(temp+"\n");
8 }
9 System.out.println(sbuffer.toString());
10
11 System.out.println();
12 File outfile = new File("D:/2.txt");
13 if(!outfile.exists()){
14 try {
15 outfile.createNewFile();
16 } catch (IOException e) {
17 // TODO Auto-generated catch block
18 e.printStackTrace();
19 }
20 }
21 byte[] b = (sbuffer.toString()).getBytes();
22 FileOutputStream fs = null;
23 fs = new FileOutputStream(outfile);
24 fs.write(b);
25
26 fs.close();
27 bf.close();
28
