1//--BufferedReader 行读取
 2BufferedReader br = null;
 3try {
 4    br = new BufferedReader(new FileReader("foo.txt"));
 5    List<String> content = new ArrayList<String>();
 6    String line = null;
 7    while((line=br.readLine())!=null){
 8        content.add(line);
 9    }
10} catch (FileNotFoundException e) {
11} catch(IOException e){
12} finally{
13    if(br != null){
14        try {
15            br.close();
16        } catch (IOException e) {
17        }
18    }
19}

 1//--借助于 buffer 缓冲区来读字节
 2InputStream is = null;
 3try {
 4    is = new FileInputStream("foo.txt");
 5    StringBuffer content = new StringBuffer();
 6    int read = -1;
 7    byte[] buffer = new byte[1024];
 8    while((read=is.read(buffer))!=-1){
 9        content.append(new String(buffer,0,read));
10    }
11} catch (FileNotFoundException e) {
12} catch(IOException e){
13} finally{
14    if(is != null){
15        try {
16            is.close();
17        } catch (IOException e) {
18        }
19    }
20}