Java 加解密

野性酷女 2022-07-21 05:58 256阅读 0赞

package com.wt.ast.common.util;
    
    import java.io.BufferedInputStream;
    import java.io.BufferedOutputStream;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.OutputStream;
    
    public class VideoEd {
    	
    	public static void main(String[] args) {
    		
    //		String originFile1 = "F:\\Youku Files\\transcode\\2134.doc";
    //		String desFile1 = "F:\\Youku Files\\transcode\\des\\des1.doc";
    //		
    //		String originFile2 = "F:\\Youku Files\\transcode\\origin.doc";
    //		String desFile2 = "F:\\Youku Files\\transcode\\des\\des2.doc";
    		
    //		String originFile1 = "F:\\Youku Files\\transcode\\origin.rmvb";
    //		String desFile1 = "F:\\Youku Files\\transcode\\des\\des1.rmvb";
    //		
    //		String originFile2 = "F:\\Youku Files\\transcode\\origin.rmvb";
    //		String desFile2 = "F:\\Youku Files\\transcode\\des\\des2.rmvb";
    		
    		String originFile1 = "F:\\Youku Files\\transcode\\123.jpg";
    		String desFile1 = "F:\\Youku Files\\transcode\\des\\des1.jpg";
    		
    		String originFile2 = "F:\\Youku Files\\transcode\\123.jpg";
    		String desFile2 = "F:\\Youku Files\\transcode\\des\\des2.jpg";
    			
    //			Codec1(desFile1, desFile2,false);
    			
    		Codec1(originFile1, desFile1,true);
    			Codec1(desFile1, desFile2,false);
    //		Codec3(originFile2, desFile2,true);
    	}
    	
    	/*
    	 * 加解密
    	 */
    	/**
    	 * @param originFile
    	 * @param desFile
    	 * @param flag true加密
    	 * false解密
    	 */
    	public static void Codec1(String originFile, String desFile,boolean flag) {
    
    		long startTime = System.currentTimeMillis();
    		mkdirsPackage(desFile);
    
    		InputStream is = null;
    		OutputStream os = null;
    
    		try {
    			
    			byte[] b = new byte[8];
    			b = "11111111".getBytes();
    
    			is = new BufferedInputStream(new FileInputStream(new File(
    					originFile)));
    			os = new BufferedOutputStream(new FileOutputStream(
    					new File(desFile)));
    
    			if(flag){
    				
    				os.write(b);
    			}else{
    				is.read(b);
    			}
    			
    			byte[] bytes = new byte[1024];
    
    			int length = 0;
    
    			while ((length = is.read(bytes)) > 0) {
    
    				os.write(bytes, 0, length);
    			}
    
    		} catch (Exception e) {
    		} finally {
    
    			if (null != is) {
    
    				try {
    					is.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    
    			if (null != os) {
    				try {
    					os.flush();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    				try {
    					os.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    		}
    
    		long endTime = System.currentTimeMillis();
    
    		long timeSpent = (endTime - startTime) / 1000;
    
    		System.out.println("Codec1'is.read(bytes)'花了" + timeSpent + "秒");
    	}
    
    	public static void Codec2(String originFile, String desFile) {
    
    		long startTime = System.currentTimeMillis();
    		mkdirsPackage(desFile);
    
    		InputStream is = null;
    		OutputStream os = null;
    
    		try {
    
    			
    			byte[] b = new byte[8];
    			b = "11111111".getBytes();
    
    			is = new BufferedInputStream(new FileInputStream(new File(
    					originFile)));
    			os = new BufferedOutputStream(new FileOutputStream(
    					new File(desFile)));
    
    			is.read(b);
    
    			byte[] bytes = new byte[1024];
    
    			int length = 0;
    
    			while ((length = is.read(bytes,0,1024)) > 0) {
    
    				os.write(bytes, 0, length);
    			}
    
    		} catch (Exception e) {
    		} finally {
    
    			if (null != is) {
    
    				try {
    					is.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    
    			if (null != os) {
    				try {
    					os.flush();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    				try {
    					os.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    		}
    
    		long endTime = System.currentTimeMillis();
    
    		long timeSpent = (endTime - startTime) / 1000;
    
    		System.out.println("Codec2花了'is.read(bytes,0,1024)'" + timeSpent + "秒");
    	}
    	
    	public static void Codec3(String originFile, String desFile,boolean flag) {
    
    		long startTime = System.currentTimeMillis();
    		mkdirsPackage(desFile);
    
    		InputStream is = null;
    		OutputStream os = null;
    
    		try {
    			
    			byte[] b = new byte[8];
    			b = "11111111".getBytes();
    
    			is = new FileInputStream(new File(originFile));
    			os = new FileOutputStream(new File(desFile));
    
    			if(flag){
    				
    				os.write(b);
    			}else{
    				is.read(b);
    			}
    			
    			byte[] bytes = new byte[1024];
    
    			int length = 0;
    
    			while ((length = is.read(bytes)) > 0) {
    
    				os.write(bytes, 0, length);
    			}
    
    		} catch (Exception e) {
    		} finally {
    
    			if (null != is) {
    
    				try {
    					is.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    
    			if (null != os) {
    				try {
    					os.flush();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    				try {
    					os.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    		}
    
    		long endTime = System.currentTimeMillis();
    
    		long timeSpent = (endTime - startTime) / 1000;
    
    		System.out.println("Codec1'is.read(bytes)'花了" + timeSpent + "秒");
    	}
    	
    	public static void mkdirsPackage(String desPath){
    		File file = new File(desPath);
    		//判断目标文件所在的目录是否存在  
            if(!file.getParentFile().exists()) {  
                file.getParentFile().mkdirs();
            } 
    	}
    }