对比使用InputStream&OutputStream 、BufferedInputStream&BufferedOutputStream、 BufferedReader&~Writer的时长

Love The Way You Lie 2021-11-13 23:26 173阅读 0赞

package ReleaseCopyAndStickFunctionDemo;
    import java.io.BufferedInputStream;
    import java.io.BufferedOutputStream;
    import java.io.BufferedReader;
    import java.io.BufferedWriter;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.FileReader;
    import java.io.FileWriter;
    import java.io.IOException;
    import java.io.OutputStream;
    import java.io.Reader;
    import java.io.StreamTokenizer;
    import java.io.Writer;
    import java.text.BreakIterator;
    import javax.print.DocFlavor.INPUT_STREAM;
    import javax.swing.JFileChooser;
    import javax.xml.transform.stream.StreamResult;
    import org.omg.CORBA_2_3.portable.InputStream;
    /**
     * 对比使用InputStream  BUfferedInputStream BufferedReader的时长 
     * 实现文件内容的复制和粘贴
     * @author 李。。
     * @version 1.8
     * @date 2019年8月1日 上午9:05:41
     * @content JAVA代码
     * @motto 代码千万条，可读第一条。代码不规范，error多两行。
     */
    public class CopyAndStickDemo{
        public static final String filePath="c://test";
        public static final String filePath1="c://text/复制成功的文件.txt";
    	public static void main(String[] args){
    		System.out.println("函数"+"inOutputStream()"+"的使用时长为");
    		long time=-1;
    		try  {
    			   time=inOutputStream();
    			
    		     } catch (IOException e) {
    		    	 
    			    e.printStackTrace();
    		}
    		finally
    		{
    			System.out.println("耗时"+time+"毫秒");
    		}
    		System.out.println("函数"+" BufferedInputOutputStream()"+
    		                   "的使用时长为");
    		try {
    			time=BufferedInputOutputStream();
    		} catch (IOException e) {
    			
    			e.printStackTrace();
    		}
    		finally
    		{
    			System.out.println("耗时"+time+"毫秒");
    		}
    		System.out.println("函数"+"WriterAndReader()"+
                    "的使用时长为");
    		try {
    			time=WriterAndReader();
    		} catch (IOException e) {
    			
    			e.printStackTrace();
    		}
    		finally
    		{
    			System.out.println("耗时"+time+"毫秒");
             }
    		
    	  }
    	/**
    	 * 使用OutputStream和InputStream进指定为文件内容的复制粘贴的功能
    	 * @throws IOException 抛出输入输出流异常
    	 */
    	public static long inOutputStream() throws IOException
    	{ long startTime=System.currentTimeMillis();
    	   
    		JFileChooser fileChoose=new JFileChooser(filePath);
    		//显示文件夹的对话框
    		fileChoose.showOpenDialog(null);
    		//将选择的文件的对象赋给file对象
    		File file=fileChoose.getSelectedFile();
    		fileChoose.showOpenDialog(null);
    		File file1=fileChoose.getSelectedFile();
    		//使用InputSteam 和OutputStream 实现文件内容的复制和粘贴
    	    FileInputStream inputStream=new FileInputStream(file);
    	    OutputStream outputStream=new FileOutputStream(file1,false);
    	    byte[]bytes=new byte[20000];//字节数组
    	   int size=inputStream.available();
    	   inputStream.read(bytes);
    	   //对文件的内容进行读取输出
    	   String content=null;
    	   content=new String(bytes);
    	   //System.out.println("文件"+file.getName()+"的内容为："+content);
    	   inputStream.close();
    	    //进行文件的写入
             outputStream.write(bytes);
             //对文件进行关闭
             outputStream.close();
             long endTime=System.currentTimeMillis();
             System.out.println("文件夹："+filePath);
             System.out.println("文件"+file.getName()+"的内容"+"复制到"+
                                "文件"+file1.getName()+"成功！");
             return endTime-startTime;
             
    	   }
    	 public static long BufferedInputOutputStream() throws IOException
    	 {
    		 int i=0;
    		 long startTime=System.currentTimeMillis();
    		 JFileChooser fileChoose=new JFileChooser(filePath);
    		 fileChoose.showOpenDialog(null);
    		 File file=fileChoose.getSelectedFile();
    		 fileChoose.showOpenDialog(null);
    		 File file1=fileChoose.getSelectedFile();
    		FileInputStream inputStream=new FileInputStream(file);
    		 OutputStream outputStream=new FileOutputStream(file1,false);
    		BufferedInputStream in=new BufferedInputStream(inputStream);
    		BufferedOutputStream out=new BufferedOutputStream(outputStream);
    		//对文件内容进行输出
    		int size = 0;
    		try {
    			size = in.available();
    		} catch (IOException e1) {
    			
    			e1.printStackTrace();
    		}
    		byte []bytes=new byte[size];
    		 in.read(bytes);
    		 
    		 //System.out.println("文件"+file.getName()+
    		 //"的内容为:"+new String(bytes));
    		 
    		//进行文件内容的复制
    		 try {
    				out.write(bytes);
    			} catch (IOException e) {
    			
    				e.printStackTrace();
    			}
    			finally{
    				  System.out.println("文件"+file.getName()+"的内容"+"复制到"+
    	                      "文件"+file1.getName()+"成功！");
    			}
    //		try {
    //			while((i=in.read())!=-1)
    //			{
    //				out.write(i);;
    //			}
    //		} catch (IOException e) {
    //		
    //			e.printStackTrace();
    //		}
    //		finally{
    //			  System.out.println("文件"+file.getName()+"的内容"+"复制到"+
    //                      "文件"+file1.getName()+"成功！");
    //		}
    		in.close();
    		inputStream.close();
    		out.close();
    		outputStream.close();
    		long endTime=System.currentTimeMillis();
    		
    		return endTime-startTime;
    		 
    	 }
    	 /**
    	  * 字符流的方式进行文件内容的复制粘贴功能
    	  * @return
    	 * @throws IOException 
    	  */
    	 public static long  WriterAndReader() throws IOException
    	 {
    		 int i=0;
        long startTime=System.currentTimeMillis();
    	JFileChooser fileChoose=new JFileChooser(filePath);
    	fileChoose.showOpenDialog(null);
    	File file=fileChoose.getSelectedFile();
    	fileChoose.showOpenDialog(null);
    	File file1=fileChoose.getSelectedFile();
    	Reader reader=null;
    	Writer writer=null;
    	 try {
    	        reader=new FileReader(file);
    	        writer=new FileWriter(file1);
    	} catch (FileNotFoundException e) {
    		
    		e.printStackTrace();
    	}
    	 BufferedReader bReader=new BufferedReader(reader);
    	 BufferedWriter bWriter=new BufferedWriter(writer);
    	 //对文件的内容进行输出
    	 System.out.println("文件"+file.getName()+"的内容为：");
    
    	     StringBuffer content=new StringBuffer();
    	  try {
    		while((i=bReader.read())!=-1)
    		  {
    			  bWriter.write(i);
    		  }
    	} catch (IOException e) {
    		
    		e.printStackTrace();
    	}
    	  try {
    		bReader.close();
    	} catch (IOException e1) {
    		
    		e1.printStackTrace();
    	}
    	try {
    		bWriter.flush();
    	} catch (IOException e) {
    		
    		e.printStackTrace();
    	}
    	  try {
    		bWriter.close();
    	} catch (IOException e) {
    		
    		e.printStackTrace();
    	}
    	  long endTime=System.currentTimeMillis();
    	
    	return endTime-startTime;
    		 
    	 }
    
    }

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