IO异常 的处理

 package com.throwsss;

 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;

 /**
  *  IO异常 的处理
  * @author Administrator
  *用 throw new RuntimeException(e);方法
  */
 class Read{
     public static void readTest(){
         File file = new File("D://aa.txt");
         InputStream inputStream = null;
         try {
             inputStream = new FileInputStream(file);
             byte[] bs = new byte[1024];
             int length = 0;
             while((length = inputStream.read(bs)) != -1){
                 String str = new String(bs,0,length);
                 System.out.println(str);
             }
         } catch (FileNotFoundException e) {
             //e.printStackTrace();
             throw new RuntimeException(e);
         } catch (IOException e){
             //e.printStackTrace();
             throw new RuntimeException(e);
         } finally{
             if(inputStream != null){
             try {
                 inputStream.close();
                 System.out.println("文件釋放成功");
             } catch (IOException e) {
                 // TODO Auto-generated catch block
                 //e.printStackTrace();
                 System.out.println("文件释放失败");
                 throw new RuntimeException(e);

             }
             }
         }

     }
 }
 public class Throwss {

     public static void main(String[] args) {
         // TODO Auto-generated method stub

         Read read = new Read();
         read.readTest();
     }

 }