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1 package shi; 2 3 import java.io.*; 4 5 public class wenjianIO { 6 public static void main(String agrs[]){ 7 FileInputStream fis=null; 8 File f=new File("F:/test/javakc.txt"); 9 10 try {11 fis=new FileInputStream(f);12 byte[]arr=new byte[(int)f.length()];13 fis.read(arr);14 String str= new String (arr);15 System.out.println(str);16 17 } catch (FileNotFoundException e) {18 // TODO Auto-generated catch block19 e.printStackTrace();20 } catch (IOException e) {21 // TODO Auto-generated catch block22 e.printStackTrace();23 }24 finally{25 if(fis!=null){26 try{27 fis.close();28 }29 catch(IOException e){30 e.printStackTrace();31 }32 }33 }34 35 }36 37 }View Code
java向檔案中讀寫內容
package shi;import java.io.*;public class wenjianIO { public static void main(String agrs[]){ FileInputStream fis=null; FileOutputStream fos=null; File f=new File("F:/test/javakc.txt"); try {// 向檔案中寫內容 fos=new FileOutputStream(f); String s="你的小EZ,有走歪了"; byte[]b=s.getBytes(); fos.write(b); // 向檔案中讀取內容 fis=new FileInputStream(f); byte[]b2=new byte[(int) f.length()]; fis.read(b2); String str=new String (b2); System.out.println(str); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally{ if(fis!=null){ try{ fos.close(); fis.close(); } catch(IOException e){ e.printStackTrace(); } } } }}
在java中讀取檔案中的內容