Java 操作 文件 File

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写文件

public static void stream(String  path) throws FileNotFoundException, IOException {          Long startTime = System.currentTimeMillis();          BufferedReader reader = getReader(new File(path));            String line;           while ((line = reader.readLine()) != null) {              // 空转          System.out.println(line);                }          Long estimatedTime = System.currentTimeMillis() - startTime;          System.out.printf("stream Diff: %d ms\n", estimatedTime);        } 

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读文件

public static void stream(String file) throws FileNotFoundException, IOException {          Long startTime = System.currentTimeMillis();          BufferedReader reader = getReader(new File(path));            String line;                while ((line = reader.readLine()) != null) {              // 空转          System.out.println(line);                 }          Long estimatedTime = System.currentTimeMillis() - startTime;          System.out.printf("stream Diff: %d ms\n", estimatedTime);        } 

 public static BufferedReader getReader(File f) throws FileNotFoundException, IOException {          BufferedReader reader = null;          if (f.getName().endsWith(".gz")) {              reader = new BufferedReader(new InputStreamReader(new GZIPInputStream(new FileInputStream(f))));          } else {              reader = new BufferedReader(new InputStreamReader(new FileInputStream(f)));          }          return reader;      }  

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