Java 输入输出流总结

1. 运用BufferedInputStream 读取文件流和BufferedOutputStream写文件流：

Java代码 

1. protected static void writeFile2(String inputPath, String outputPath) {  
2.         BufferedInputStream bis = null;  
3.         BufferedOutputStream bos = null;  
4.         try {  
5.             bis = new BufferedInputStream(new FileInputStream(inputPath));  
6.             bos = new BufferedOutputStream(new FileOutputStream(outputPath));  
7.             int buffer = 1024 * 1024;  
8.             byte[] data = new byte[buffer];  
9.             int len;  
10.             while ((len = bis.read(data)) != -1) {  
11.                 bos.write(data, 0, len);  
12.             }  
13.         } catch (Exception e) {  
14.             e.printStackTrace();  
15.         } finally {  
16.             try {  
17.                 if (bis != null) {  
18.                     bis.close();  
19.                 }  
20.                 if (bos != null) {  
21.                     bos.close();  
22.                 }  
23.             } catch (IOException e) {  
24.             }  
25.         }  
26.     }  

 

2. BufferedReader 读取文件流和BufferedWriter写文件流：

Java代码 

1. protected static String readFile(String inputPath) {  
2.         BufferedReader br = null;  
3.         try {  
4.             br = new BufferedReader(new InputStreamReader(new FileInputStream(  
5.                     inputPath)));  
6.             StringBuffer result = new StringBuffer();  
7.             String lineString = null;  
8.             while ((lineString = br.readLine()) != null) {  
9.                 result.append(lineString);  
10.                 result.append("\n");  
11.             }  
12.             return result.toString();  
13.   
14.         } catch (IOException e) {  
15.             e.printStackTrace();  
16.             return null;  
17.         } finally {  
18.             try {  
19.                 if (br != null) {  
20.                     br.close();  
21.                 }  
22.             } catch (IOException e) {  
23.             }  
24.         }  
25.   
26.     }  

 

Java代码 

1. protected static void writeFile(String inputString, String outputPath)  
2.             {  
3.         BufferedWriter bw = null;  
4.         try {  
5.             bw = new BufferedWriter(new FileWriter(outputPath));  
6.             bw.write(inputString);  
7.         } catch (IOException e) {  
8.             e.printStackTrace();  
9.         } finally {  
10.             try {  
11.                 if (bw != null) {  
12.                     bw.close();  
13.                 }  
14.             } catch (IOException e) {  
15.             }  
16.         }  
17.     }