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判断两文件中的内容是否一致_如何查看两个so库内容是否一致

作者：小惠珠哦 | 2024-07-23 22:25:15

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如何查看两个so库内容是否一致

1、判断两文件中的内容是否一致的shell脚本内容

  1. #!/bin/bash
  2.  
  3. file1=$1
  4. file2=$2
  5.  
  6. if [ -z $file1 ]; then 
  7. exit 1
  8. fi
  9. if [ -z $file2 ]; then
  10. exit 2
  11. fi
  12.  
  13. type=$3
  14. if [ -z $type ];then 
  15. type=1
  16. fi
  17.  
  18. sed -i '/^#/d' $file1
  19. sed -i '/^#/d' $file2
  20. sed -i '/^[ ]*$/d' $file1
  21. sed -i '/^[ ]*$/d' $file2
  22.  
  23. java -cp /root/homework/CheckFile/IsSameFiles.jar com.utils.IsSameFiles.App $file1 $file2 $type

2、IsSameFiles.jar文件中的内容

①com.utils.IsSameFiles.App主类中的main()方法

  1. public static void main( String[] args ) {
  2.     	if(args.length < 2) {
  3.     		System.out.println("You need to enter at least two parameters!");
  4.     		return;
  5.     	}
  6.     	
  7.     	String file1 = args[0];
  8.     	String file2 = args[1];
  9.     	int type = 1;
  10.     	if(args.length >= 3) {
  11.     		type = Integer.parseInt(args[2]);
  12.     	}
  13.     	
  14.     	boolean result = false;
  15.     	try {
  16.     		// type 表示检查文件的类型，1：小文件MD5值，2：大文件MD5值，3：小文件有效内容，4：大文件有效内容
  17.     		switch(type) {
  18.     		case 1:{
  19.     			// 比较两个小文件MD5是否相等
  20. 	    		long startTime = System.currentTimeMillis();
  21. 				result = CheckLittleFilesMD5.checkFiles(file1, file2);
  22. 				long endTime = System.currentTimeMillis();
  23. 				System.out.println("CheckLittleFilesMD5.checkFiles() use time " + (endTime - startTime) + "ms");
  24. 				break;
  25. 			}
  26.     		case 2:{
  27.     			// 比较两个大文件MD5是否相等
  28.     			long startTime = System.currentTimeMillis();
  29. 				result = CheckBigFilesMD5.checkFiles(file1, file2);
  30. 				long endTime = System.currentTimeMillis();
  31. 				System.out.println("CheckBigFilesMD5.checkFile() use time " + (endTime - startTime) + "ms");
  32. 				break;
  33.     		}
  34.     		case 3:{
  35.     			// 比较两个小文件具体内容的新增与删减
  36.     			long startTime = System.currentTimeMillis();
  37. 				List<String> resultList = CheckLittleFilesContent.checkFiles(file1, file2);
  38. 				long endTime = System.currentTimeMillis();
  39. 				if(!resultList.isEmpty()) {
  40. 					System.out.println("+++++++++ unequal +++++++++++++");
  41. 					System.out.println("+++++++++ 标号'-'代表src文件中删除的内容，标号'+'代表opt文件中新增的内容  +++++++++++++");
  42. 					
  43. 				}
  44. 				System.out.println("CheckLittleFilesContent.checkFile() use time " + (endTime - startTime) + "ms");
  45. 				for(String res : resultList) {
  46. 					System.out.println(res);
  47. 				}
  48. 				break;
  49.     		}
  50.     			
  51.     		}
  52.     		
  53. 		} catch (IOException e) {
  54. 			// TODO Auto-generated catch block
  55. 			e.printStackTrace();
  56. 		}
  57.         
  58.     }

②CheckLittleFilesContent类的具体内容

  1. public class CheckLittleFilesContent {
  2. 	
  3. 	protected static char hexDigits[] = 
  4. 		{ '0', '1', '2', '3', '4', '5', '6','7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };  
  5. 	
  6. 	protected static MessageDigest messageDigest = null;  
  7.     static {  
  8.         try {  
  9.             messageDigest = MessageDigest.getInstance("MD5");  
  10.         } catch (NoSuchAlgorithmException nsaex) {  
  11.             System.err.println(CheckBigFilesMD5.class.getName()+"初始化失败，MessageDigest不支持MD5!");  
  12.             nsaex.printStackTrace();  
  13.         }  
  14.     } 
  15.     
  16.     private static final int buffSize = 1 * 1024;
  17. 	// key:文件中行内容的MD5，value:文件中行的内容
  18. 	private static Map<String, String> srcFileMap = new HashMap<String, String>();
  19. 	private static Map<String, String> optFileMap = new HashMap<String, String>();
  20. 	// List的下表代表行号，值代表文件中当前行内容的MD5
  21. 	private static List<String> srcFileMD5List = new ArrayList<String>();
  22. 	private static List<String> optFileMD5List = new ArrayList<String>();
  23. 	
  24. 	/**
  25.      * 检查两个小文件有效内容是否相等
  26.      * @return boolean true 相等
  27. 	 * @throws IOException 
  28.      * @throws IOException
  29.      */
  30. 	public static List<String> checkFiles(String srcFilePath, String optFilePath) throws IOException {
  31. 		File srcFile = new File(srcFilePath);
  32.         File optFile = new File(optFilePath);
  33.         
  34.         if (srcFile.length() == optFile.length()) {
  35.             System.out.println("+++++++++ equals +++++++++++++");
  36.             return new ArrayList<String>();
  37.         }
  38. 		
  39. 		// 加载需要比较的两个文件到内存中
  40. 		loadFiles(srcFilePath, optFilePath);
  41. 		
  42. 		// 求srcFileMD5List与optFileMD5List的差集
  43. 		List<String> tmplist = new ArrayList<String>();
  44. 		tmplist.addAll(srcFileMD5List);
  45. 		srcFileMD5List.removeAll(optFileMD5List);
  46. 		optFileMD5List.removeAll(tmplist);
  47. 		
  48. //		// 求srcFileMD5List与optFileMD5List的交集
  49. //		List<String> tmplist = new ArrayList<String>();
  50. //		tmplist.addAll(srcFileMD5List);
  51. //		tmplist.retainAll(optFileMD5List);
  52. //		
  53. //		// 求srcFileMD5List与optFileMD5List的差集
  54. //		srcFileMD5List.removeAll(tmplist);
  55. //		optFileMD5List.removeAll(tmplist);
  56. 		
  57. 		List<String> resultList = new ArrayList<String>();
  58. 		for(String srcFileMD5 : srcFileMD5List) {
  59. 			String srcFileContent = srcFileMap.get(srcFileMD5);
  60. 			resultList.add(srcFileContent);
  61. 		}
  62. 		for(String optFileMD5 : optFileMD5List) {
  63. 			String optFileContent = optFileMap.get(optFileMD5);
  64. 			resultList.add(optFileContent);
  65. 		}
  66. 		
  67. 		return resultList;
  68. 		
  69. 	}
  70. 	
  71. 	private static void loadFiles(String srcFilePath, String optFilePath) throws IOException {
  72. 		
  73. 		File file = new File(srcFilePath);
  74. 		InputStream in = new FileInputStream(file);
  75. 		InputStreamReader isr = new InputStreamReader(in);// InputStreamReader 是字节流通向字符流的桥梁,
  76. 		BufferedReader br = new BufferedReader(isr);
  77. 		String buff = "";
  78. 		long lineIndex = 0;
  79. 		StringBuffer sb = new StringBuffer();
  80. 		
  81. 		while((buff = br.readLine()) != null) {
  82. 			lineIndex++;
  83. 			String srcMD5 = getMD5String(buff);
  84. 			srcFileMap.put(srcMD5, sb.append("-").append(lineIndex).append("---").append(buff).toString());
  85. 			srcFileMD5List.add(srcMD5);
  86. 			sb.setLength(0);
  87. 		}
  88. 		
  89. 		file = new File(optFilePath);
  90. 		in = new FileInputStream(file);
  91. 		isr = new InputStreamReader(in);// InputStreamReader 是字节流通向字符流的桥梁,
  92. 		br = new BufferedReader(isr);
  93. 		lineIndex = 0;
  94. 		while((buff = br.readLine()) != null) {
  95. 			lineIndex++;
  96. 			String optMD5 = getMD5String(buff);
  97. 			optFileMap.put(optMD5, sb.append("+").append(lineIndex).append("---").append(buff).toString());
  98. 			optFileMD5List.add(optMD5);
  99. 			sb.setLength(0);
  100. 		}
  101. 		
  102. 		try {
  103. 			if(br != null)
  104. 				br.close();
  105. 			if(isr != null)
  106. 				isr.close();
  107. 			if(in != null) {
  108. 				in.close();
  109. 			}
  110. 		}catch(IOException e) {
  111. 			if(br != null)
  112. 				br.close();
  113. 			if(isr != null)
  114. 				isr.close();
  115. 			if(in != null) {
  116. 				in.close();
  117. 			}
  118. 		}finally {
  119. 			if(br != null)
  120. 				br=null;
  121. 			if(isr != null)
  122. 				isr=null;
  123. 			if(in != null) {
  124. 				in=null;
  125. 			}
  126. 		}
  127. 	}
  128. 	
  129. 	private static String getMD5String(String s) {  
  130.         return getMD5String(s.getBytes());  
  131.     }  
  132.   
  133.     private static String getMD5String(byte[] bytes) {  
  134.         messageDigest.update(bytes);  
  135.         return bufferToHex(messageDigest.digest());  
  136.     }  
  137. 	
  138. 	private static String bufferToHex(byte bytes[]) {  
  139.         return bufferToHex(bytes, 0, bytes.length);  
  140.     }  
  141.   
  142.     private static String bufferToHex(byte bytes[], int m, int n) {  
  143.         StringBuffer stringbuffer = new StringBuffer(2 * n);  
  144.         int k = m + n;  
  145.         for (int l = m; l < k; l++) {  
  146.             appendHexPair(bytes[l], stringbuffer);  
  147.         }  
  148.         return stringbuffer.toString();  
  149.     } 
  150.     
  151.     private static void appendHexPair(byte bt, StringBuffer stringbuffer) {  
  152.         char c0 = hexDigits[(bt & 0xf0) >> 4];  
  153.         char c1 = hexDigits[bt & 0xf];  
  154.         stringbuffer.append(c0);  
  155.         stringbuffer.append(c1);  
  156.     }  
  157.     
  158.  
  159. }

③CheckLittleFilesMD5类的具体内容

  1. public class CheckLittleFilesMD5 {
  2. 	
  3. 	/**
  4.      * 检查两个小文件MD5是否相等
  5.      * @return boolean true 相等
  6.      * @throws IOException
  7.      */
  8.     public static boolean checkFiles(String tmpFile1, String tmpFile2) throws IOException {
  9.         File file1 = new File(tmpFile1);
  10.         File file2 = new File(tmpFile2);
  11.         
  12.         if (file1.length() != file2.length()) {
  13.             System.out.println("+++++++++ unequal +++++++++++++");
  14.             return false;
  15.         }
  16.         
  17.         InputStream fileStream1 = new FileInputStream(file1);
  18.         InputStream fileStream2 = new FileInputStream(file2);
  19. //        InputStream 转 byte[]
  20.         byte[] imageByteArray = new byte[fileStream1.available()];
  21.         return isSameFiles(imageByteArray, new byte[fileStream2.available()]);
  22.     }
  23.     
  24.     /**
  25.      * 验证两个文件字节流是否相等
  26.      * @return boolean true 相等
  27.      * @throws IOException
  28.      */
  29.     private static boolean isSameFiles(byte[] fileByte1, byte[] fileByte2) {
  30.         String firstFileMd5 = DigestUtils.md5Hex(fileByte1);
  31.         String secondFileMd5 = DigestUtils.md5Hex(fileByte2);
  32.         if (firstFileMd5.equals(secondFileMd5)) {
  33.             System.out.println("---- equals ------ md5 " + firstFileMd5);
  34.             return true;
  35.         } else {
  36.             System.out.println(firstFileMd5 + " is firstFileMd5 ++ unequal ++ secondFileMd5 = " + secondFileMd5);
  37.             return false;
  38.         }
  39.     }
  40.  
  41. }

④CheckBigFilesMD5类的具体内容

  1. public class CheckBigFilesMD5 {
  2. 	
  3. 	protected static char hexDigits[] = 
  4. 		{ '0', '1', '2', '3', '4', '5', '6','7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };  
  5. 	
  6. 	protected static MessageDigest messageDigest = null;  
  7.     static {  
  8.         try {  
  9.             messageDigest = MessageDigest.getInstance("MD5");  
  10.         } catch (NoSuchAlgorithmException nsaex) {  
  11.             System.err.println(CheckBigFilesMD5.class.getName()+"初始化失败，MessageDigest不支持MD5!");  
  12.             nsaex.printStackTrace();  
  13.         }  
  14.     } 
  15.     
  16.     /**
  17.      * 检查两个大文件MD5是否相等
  18.      * @return boolean true 相等
  19.      * @throws IOException
  20.      */
  21.     public static boolean checkFiles(String srcFile, String optFile) throws IOException {
  22. 		File tmpSrcFile = new File(srcFile);
  23. 		File tmpOptFile = new File(optFile);
  24. 		
  25. 		if (tmpSrcFile.length() != tmpOptFile.length()) {
  26.             System.out.println("+++++++++ unequal +++++++++++++");
  27.             return false;
  28.         }
  29. 		
  30. 		String srcFileMD5 = getFileMD5String(tmpSrcFile);
  31. 		String optFileMD5 = getFileMD5String(tmpOptFile);
  32. 		
  33. 		if(srcFileMD5.equals(optFileMD5)) {
  34. 			System.out.println("---- equals ------ md5 " + srcFileMD5);
  35.             return true;
  36.         } else {
  37.             System.out.println(srcFileMD5 + " is srcFileMD5 ++ unequal ++ optFileMD5 = " + optFileMD5);
  38.             return false;
  39.         }
  40.     }
  41. 	
  42. 	
  43. 	public static String getFileMD5String(File file) throws IOException {  
  44.         FileInputStream in = new FileInputStream(file);  
  45.         FileChannel ch = in.getChannel();  
  46.           
  47.         //700000000 bytes are about 670M  
  48.         int maxSize=700000000;  
  49.           
  50.         long startPosition=0L;  
  51.         long step=file.length()/maxSize;  
  52.           
  53.         if(step == 0){  
  54.             MappedByteBuffer byteBuffer = ch.map(FileChannel.MapMode.READ_ONLY, 0,file.length());  
  55.             messageDigest.update(byteBuffer);  
  56.             return bufferToHex(messageDigest.digest());  
  57.         }  
  58.           
  59.         for(int i=0;i<step;i++){  
  60.             MappedByteBuffer byteBuffer = ch.map(FileChannel.MapMode.READ_ONLY, startPosition,maxSize);  
  61.             messageDigest.update(byteBuffer);  
  62.             startPosition+=maxSize;  
  63.         }  
  64.           
  65.         if(startPosition==file.length()){  
  66.             return bufferToHex(messageDigest.digest());  
  67.         }  
  68.   
  69.         MappedByteBuffer byteBuffer = ch.map(FileChannel.MapMode.READ_ONLY, startPosition,file.length()-startPosition);  
  70.         messageDigest.update(byteBuffer);  
  71.           
  72.               
  73.         return bufferToHex(messageDigest.digest());  
  74.     }  
  75. 	
  76. 	public static String getMD5String(String s) {  
  77.         return getMD5String(s.getBytes());  
  78.     }  
  79.   
  80.     public static String getMD5String(byte[] bytes) {  
  81.         messageDigest.update(bytes);  
  82.         return bufferToHex(messageDigest.digest());  
  83.     }  
  84. 	
  85. 	private static String bufferToHex(byte bytes[]) {  
  86.         return bufferToHex(bytes, 0, bytes.length);  
  87.     }  
  88.   
  89.     private static String bufferToHex(byte bytes[], int m, int n) {  
  90.         StringBuffer stringbuffer = new StringBuffer(2 * n);  
  91.         int k = m + n;  
  92.         for (int l = m; l < k; l++) {  
  93.             appendHexPair(bytes[l], stringbuffer);  
  94.         }  
  95.         return stringbuffer.toString();  
  96.     } 
  97.     
  98.     private static void appendHexPair(byte bt, StringBuffer stringbuffer) {  
  99.         char c0 = hexDigits[(bt & 0xf0) >> 4];  
  100.         char c1 = hexDigits[bt & 0xf];  
  101.         stringbuffer.append(c0);  
  102.         stringbuffer.append(c1);  
  103.     }  
  104.     
  105.     
  106.     public static boolean checkPassword(String password, String md5PwdStr) {  
  107.         String s = getMD5String(password);  
  108.         return s.equals(md5PwdStr);  
  109.     }  
  110.  
  111. }

 

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