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();
    }

}