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Java对文件压缩/加密/解密/解压缩的例子,DES/RS

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RSA压缩加密/解压缩解密
  1. import java.io.File;
  2. import java.io.FileInputStream;
  3. import java.io.FileOutputStream;
  4. import java.io.ObjectInputStream;
  5. import java.io.ObjectOutputStream;
  6. import java.security.Key;
  7. import java.security.KeyPair;
  8. import java.security.KeyPairGenerator;
  9. import java.security.PrivateKey;
  10. import java.security.PublicKey;
  11. import java.security.SecureRandom;
  12. import java.util.Properties;
  13. import java.util.UUID;
  14. import java.util.zip.ZipEntry;
  15. import java.util.zip.ZipInputStream;
  16. import java.util.zip.ZipOutputStream;

  18. import javax.crypto.Cipher;

  20. /**
  21. *对文件压缩加密/解密解压缩对象类
  22. *
  23. */
  24. public class ZipEncrypt{
  25. private static PrivateKeyprivateKey;
  26. private static PublicKeypublicKey;
  27. private static void directoryZip(ZipOutputStreamout,Filef,Stringbase)
  28. throws Exception{
  29. //如果传入的是目录
  30. if (f.isDirectory()){
  31. File[]fl=f.listFiles();
  32. //创建压缩的子目录
  33. out.putNextEntry( new ZipEntry(base+ "/" ));
  34. if (base.length()== 0 ){
  35. base= "" ;
  36. } else {
  37. base=base+ "/" ;
  38. }
  39. for ( int i= 0 ;i<fl.length;i++){
  40. directoryZip(out,fl[i],base+fl[i].getName());
  41. }
  42. } else {
  43. //把压缩文件加入rar中
  44. out.putNextEntry( new ZipEntry(base));
  45. FileInputStreamin= new FileInputStream(f);
  46. byte []bb= new byte [ 2048 ];
  47. int aa= 0 ;
  48. while ((aa=in.read(bb))!=- 1 ){
  49. out.write(bb, 0 ,aa);
  50. }
  51. in.close();
  52. }
  53. }

  55. /**
  56. *压缩文件
  57. *@paramzos
  58. *@paramfile
  59. *@throwsException
  60. */
  61. private static void fileZip(ZipOutputStreamzos,Filefile)
  62. throws Exception{
  63. if (file.isFile()){
  64. zos.putNextEntry( new ZipEntry(file.getName()));
  65. FileInputStreamfis= new FileInputStream(file);
  66. byte []bb= new byte [ 2048 ];
  67. int aa= 0 ;
  68. while ((aa=fis.read(bb))!=- 1 ){
  69. zos.write(bb, 0 ,aa);
  70. }
  71. fis.close();
  72. System.out.println(file.getName());
  73. } else {
  74. directoryZip(zos,file, "" );
  75. }
  76. }

  78. /**
  79. *解压缩文件
  80. *
  81. *@paramzis
  82. *@paramfile
  83. *@throwsException
  84. */
  85. private static void fileUnZip(ZipInputStreamzis,Filefile)
  86. throws Exception{
  87. ZipEntryzip=zis.getNextEntry();
  88. if (zip== null )
  89. return ;
  90. Stringname=zip.getName();
  91. Filef= new File(file.getAbsolutePath()+ "/" +name);
  92. if (zip.isDirectory()){
  93. f.mkdirs();
  94. fileUnZip(zis,file);
  95. } else {
  96. f.createNewFile();
  97. FileOutputStreamfos= new FileOutputStream(f);
  98. byte b[]= new byte [ 2048 ];
  99. int aa= 0 ;
  100. while ((aa=zis.read(b))!=- 1 ){
  101. fos.write(b, 0 ,aa);
  102. }
  103. fos.close();
  104. fileUnZip(zis,file);
  105. }
  106. }

  108. /**
  109. *对directory目录下的文件压缩，保存为指定的文件zipFile
  110. *
  111. *@paramdirectory
  112. *@paramzipFile
  113. */
  114. private static void zip(Stringdirectory,StringzipFile){
  115. try {
  116. ZipOutputStreamzos= new ZipOutputStream( new FileOutputStream(
  117. zipFile));
  118. fileZip(zos, new File(directory));
  119. zos.close();
  120. } catch (Exceptione){
  121. e.printStackTrace();
  122. }
  123. }

  125. /**
  126. *解压缩文件zipFile保存在directory目录下
  127. *
  128. *@paramdirectory
  129. *@paramzipFile
  130. */
  131. private static void unZip(Stringdirectory,StringzipFile){
  132. try {
  133. ZipInputStreamzis= new ZipInputStream(
  134. new FileInputStream(zipFile));
  135. Filef= new File(directory);
  136. f.mkdirs();
  137. fileUnZip(zis,f);
  138. zis.close();
  139. } catch (Exceptione){
  140. e.printStackTrace();
  141. }
  142. }

  144. /**
  145. *根据key的路径文件获得持久化成文件的key
  146. *<P>
  147. *例子:RsaEncrypt.getKey("c:/systemkey/private.key");
  148. *
  149. *@paramkeyPath
  150. *@return
  151. */
  152. public static KeygetKey(StringkeyPath) throws Exception{
  153. Keykey= null ;
  154. FileInputStreamfis= new FileInputStream(keyPath);
  155. ObjectInputStreamofs= new ObjectInputStream(fis);
  156. key=(Key)ofs.readObject();
  157. return key;
  158. }

  160. /**
  161. *把文件srcFile加密后存储为destFile
  162. *
  163. *@paramsrcFile
  164. *@paramdestFile
  165. */
  166. private static void encrypt(StringsrcFile,StringdestFile,KeyprivateKey)
  167. throws Exception{
  168. Ciphercipher=Cipher.getInstance( "RSA" );
  169. cipher.init(Cipher.ENCRYPT_MODE,privateKey);
  170. FileInputStreamfis= new FileInputStream(srcFile);
  171. FileOutputStreamfos= new FileOutputStream(destFile);
  172. byte []b= new byte [ 53 ];
  173. while (fis.read(b)!=- 1 ){
  174. fos.write(cipher.doFinal(b));
  175. }
  176. fos.close();
  177. fis.close();
  178. }

  180. /**
  181. *把文件srcFile解密后存储为destFile
  182. *
  183. *@paramsrcFile
  184. *@paramdestFile
  185. *@paramprivateKey
  186. *@throwsException
  187. */
  188. private static void decrypt(StringsrcFile,StringdestFile,KeyprivateKey)
  189. throws Exception{
  190. Ciphercipher=Cipher.getInstance( "RSA" );
  191. cipher.init(Cipher.DECRYPT_MODE,privateKey);
  192. FileInputStreamfis= new FileInputStream(srcFile);
  193. FileOutputStreamfos= new FileOutputStream(destFile);
  194. byte []b= new byte [ 64 ];
  195. while (fis.read(b)!=- 1 ){
  196. fos.write(cipher.doFinal(b));
  197. }
  198. fos.close();
  199. fis.close();
  200. }

  202. /**
  203. *对目录srcFile下的所有文件目录进行先压缩后操作,然后保存为destfile
  204. *
  205. *@paramsrcFile
  206. *要操作的目录如c:/test/test
  207. *@paramdestfile
  208. *压缩加密后存放的文件名如c:/加密压缩文件.zip
  209. *@paramkeyfile
  210. *公钥存放地点
  211. */
  212. public static void encryptZip(StringsrcFile,Stringdestfile,Stringkeyfile) throws Exception{
  213. SecureRandomsr= new SecureRandom();
  214. KeyPairGeneratorkg=KeyPairGenerator.getInstance( "RSA" );
  215. kg.initialize( 512 ,sr);
  216. //产生新密钥对
  217. KeyPairkp=kg.generateKeyPair();
  218. //获得私匙
  219. ZipEncrypt.privateKey=kp.getPrivate();
  220. //获得公钥
  221. ZipEncrypt.publicKey=kp.getPublic();
  222. Filef= new File(keyfile);
  223. f.createNewFile();
  224. FileOutputStreamfos= new FileOutputStream(f);
  225. ObjectOutputStreamdos= new ObjectOutputStream(fos);
  226. dos.writeObject(ZipEncrypt.publicKey);
  228. Filetemp= new File(UUID.randomUUID().toString()+ ".zip" );
  229. temp.deleteOnExit();
  230. //先压缩文件
  231. zip(srcFile,temp.getAbsolutePath());
  232. //对文件加密
  233. encrypt(temp.getAbsolutePath(),destfile,privateKey);
  234. temp.delete();
  235. }

  237. /**
  238. *对文件srcfile进行先解密后解压缩,然后解压缩到目录destfile下
  239. *
  240. *@paramsrcfile
  241. *要解密和解压缩的文件名如c:/目标.zip
  242. *@paramdestfile
  243. *解压缩后的目录如c:/abc
  244. *@parampublicKey
  245. *公钥
  246. */
  247. public static void decryptUnzip(Stringsrcfile,Stringdestfile,
  248. KeypublicKey) throws Exception{
  249. //先对文件解密
  250. Filetemp= new File(UUID.randomUUID().toString()+ ".zip" );
  251. temp.deleteOnExit();
  252. decrypt(srcfile,temp.getAbsolutePath(),publicKey);
  253. //解压缩
  254. unZip(destfile,temp.getAbsolutePath());
  255. temp.delete();
  256. }

  258. public static void main(Stringargs[]) throws Exception{
  259. Filef= new File( "." );
  260. Propertiesprop= new Properties();;
  261. FileInputStreamfis= new FileInputStream( "./conf.properties" );
  262. prop.load(fis);
  263. //要压缩的目录
  264. StringsrcPath=prop.getProperty( "SRC_PATH" );
  265. //压缩后的存放文件
  266. StringdestZip=prop.getProperty( "DEST_FILE" );
  267. //压缩加密后的publickey
  268. Stringkeyfile=prop.getProperty( "KEY_FILE" );
  269. ZipEncrypt.encryptZip(srcPath,destZip,keyfile);
  271. /*解密
  272. ZipEncrypt.decryptUnzip("e:/comXXX/comxxxx.zip","d:/comxxx",ZipEncrypt
  273. .getKey("e:/comXXX/public.key"));
  274. */
  275. }
  276. }
AES压缩加密/解压缩解密，网上一般用base64来对byte[]编码,其实不需要，指定AES/CBC/PKCS5Padding来指定加密解密时候位数不对的情况下，用pkcs5padding来附加位数，不过这个时候读解密的文件的时候，要多读16位的验证位就不会报异常
  1. import java.io.File;
  2. import java.io.FileInputStream;
  3. import java.io.FileOutputStream;
  4. import java.io.ObjectInputStream;
  5. import java.security.Key;
  6. import java.security.SecureRandom;
  7. import java.util.UUID;
  8. import java.util.zip.ZipEntry;
  9. import java.util.zip.ZipInputStream;
  10. import java.util.zip.ZipOutputStream;
  12. import javax.crypto.Cipher;
  13. import javax.crypto.KeyGenerator;
  14. import javax.crypto.SecretKey;
  15. import javax.crypto.spec.IvParameterSpec;
  16. import javax.crypto.spec.SecretKeySpec;
  18. /**
  19. *对文件加密/解密和压缩/解压缩对象类
  20. *@author赵成明
  21. */
  22. public class ZipEncrypt{
  23. private void directoryZip(ZipOutputStreamout,Filef,Stringbase)
  24. throws Exception{
  25. //如果传入的是目录
  26. if (f.isDirectory()){
  27. File[]fl=f.listFiles();
  28. //创建压缩的子目录
  29. out.putNextEntry( new ZipEntry(base+ "/" ));
  30. if (base.length()== 0 ){
  31. base= "" ;
  32. } else {
  33. base=base+ "/" ;
  34. }
  35. for ( int i= 0 ;i<fl.length;i++){
  36. directoryZip(out,fl[i],base+fl[i].getName());
  37. }
  38. } else {
  39. //把压缩文件加入rar中
  40. out.putNextEntry( new ZipEntry(base));
  41. FileInputStreamin= new FileInputStream(f);
  42. byte []bb= new byte [ 2048 ];
  43. int aa= 0 ;
  44. while ((aa=in.read(bb))!=- 1 ){
  45. out.write(bb, 0 ,aa);
  46. }
  47. in.close();
  48. }
  49. }
  51. /**
  52. *压缩文件
  53. *@paramzos
  54. *@paramfile
  55. *@throwsException
  56. */
  57. private void fileZip(ZipOutputStreamzos,Filefile)
  58. throws Exception{
  59. if (file.isFile()){
  60. zos.putNextEntry( new ZipEntry(file.getName()));
  61. FileInputStreamfis= new FileInputStream(file);
  62. byte []bb= new byte [ 2048 ];
  63. int aa= 0 ;
  64. while ((aa=fis.read(bb))!=- 1 ){
  65. zos.write(bb, 0 ,aa);
  66. }
  67. fis.close();
  68. System.out.println(file.getName());
  69. } else {
  70. directoryZip(zos,file, "" );
  71. }
  72. }
  74. /**
  75. *解压缩文件
  76. *
  77. *@paramzis
  78. *@paramfile
  79. *@throwsException
  80. */
  81. private void fileUnZip(ZipInputStreamzis,Filefile)
  82. throws Exception{
  83. ZipEntryzip=zis.getNextEntry();
  84. if (zip== null )
  85. return ;
  86. Stringname=zip.getName();
  87. Filef= new File(file.getAbsolutePath()+ "/" +name);
  88. if (zip.isDirectory()){
  89. f.mkdirs();
  90. fileUnZip(zis,file);
  91. } else {
  92. f.createNewFile();
  93. FileOutputStreamfos= new FileOutputStream(f);
  94. byte b[]= new byte [ 2048 ];
  95. int aa= 0 ;
  96. while ((aa=zis.read(b))!=- 1 ){
  97. fos.write(b, 0 ,aa);
  98. }
  99. fos.close();
  100. fileUnZip(zis,file);
  101. }
  102. }
  104. /**
  105. *对directory目录下的文件压缩，保存为指定的文件zipFile
  106. *
  107. *@paramdirectory
  108. *@paramzipFile
  109. */
  110. private void zip(Stringdirectory,StringzipFile){
  111. try {
  112. ZipOutputStreamzos= new ZipOutputStream( new FileOutputStream(
  113. zipFile));
  114. fileZip(zos, new File(directory));
  115. zos.close();
  116. } catch (Exceptione){
  117. e.printStackTrace();
  118. }
  119. }
  121. /**
  122. *解压缩文件zipFile保存在directory目录下
  123. *
  124. *@paramdirectory
  125. *@paramzipFile
  126. */
  127. private void unZip(Stringdirectory,StringzipFile){
  128. try {
  129. ZipInputStreamzis= new ZipInputStream( new FileInputStream(zipFile));
  130. Filef= new File(directory);
  131. f.mkdirs();
  132. fileUnZip(zis,f);
  133. zis.close();
  134. } catch (Exceptione){
  135. e.printStackTrace();
  136. }
  137. }
  139. /**
  140. *根据key的路径文件获得持久化成文件的key
  141. *<P>
  142. *例子:RsaEncrypt.getKey("c:/systemkey/private.key");
  143. *
  144. *@paramkeyPath
  145. *@return
  146. */
  147. private KeygetKey(StringkeyPath) throws Exception{
  148. FileInputStreamfis= new FileInputStream(keyPath);
  149. byte []b= new byte [ 16 ];
  150. fis.read(b);
  151. SecretKeySpecdks= new SecretKeySpec(b, "AES" );
  152. fis.close();
  153. return dks;
  154. }
  156. /**
  157. *把文件srcFile加密后存储为destFile
  158. *
  159. *@paramsrcFile
  160. *@paramdestFile
  161. */
  162. private void encrypt(StringsrcFile,StringdestFile,KeyprivateKey)
  163. throws Exception{
  164. SecureRandomsr= new SecureRandom();
  165. Ciphercipher=Cipher.getInstance( "AES/CBC/PKCS5Padding" );
  166. IvParameterSpecspec= new IvParameterSpec(privateKey.getEncoded());
  167. cipher.init(Cipher.ENCRYPT_MODE,privateKey,spec,sr);
  168. FileInputStreamfis= new FileInputStream(srcFile);
  169. FileOutputStreamfos= new FileOutputStream(destFile);
  170. byte []b= new byte [ 2048 ];
  171. while (fis.read(b)!=- 1 ){
  172. fos.write(cipher.doFinal(b));
  173. }
  174. fos.close();
  175. fis.close();
  176. }
  178. /**
  179. *把文件srcFile解密后存储为destFile
  180. *
  181. *@paramsrcFile
  182. *@paramdestFile
  183. *@paramprivateKey
  184. *@throwsException
  185. */
  186. private void decrypt(StringsrcFile,StringdestFile,KeyprivateKey)
  187. throws Exception{
  188. SecureRandomsr= new SecureRandom();
  189. Cipherciphers=Cipher.getInstance( "AES/CBC/PKCS5Padding" );
  190. IvParameterSpecspec= new IvParameterSpec(privateKey.getEncoded());
  191. ciphers.init(Cipher.DECRYPT_MODE,privateKey,spec,sr);
  192. FileInputStreamfis= new FileInputStream(srcFile);
  193. FileOutputStreamfos= new FileOutputStream(destFile);
  194. byte []b= new byte [ 2064 ];
  195. while (fis.read(b)!=- 1 ){
  196. fos.write(ciphers.doFinal(b));
  197. }
  198. fos.close();
  199. fis.close();
  200. }
  202. /**
  203. *对目录srcFile下的所有文件目录进行先压缩后操作,然后保存为destfile
  204. *
  205. *@paramsrcFile
  206. *要操作的目录如c:/test/test
  207. *@paramdestfile
  208. *压缩加密后存放的文件名如c:/加密压缩文件.zip
  209. *@paramkeyfile
  210. *公钥存放地点
  211. */
  212. public void encryptZip(StringsrcFile,Stringdestfile,Stringkeyfile) throws Exception{
  213. SecureRandomsr= new SecureRandom();
  214. KeyGeneratorkg=KeyGenerator.getInstance( "AES" );
  215. kg.init( 128 ,sr);
  216. SecretKeykey=kg.generateKey();
  217. Filef= new File(keyfile);
  218. if (!f.getParentFile().exists())
  219. f.getParentFile().mkdirs();
  220. f.createNewFile();
  221. FileOutputStreamfos= new FileOutputStream(f);
  222. fos.write(key.getEncoded());
  223. Filetemp= new File(UUID.randomUUID().toString()+ ".zip" );
  224. temp.deleteOnExit();
  225. //先压缩文件
  226. zip(srcFile,temp.getAbsolutePath());
  227. //对文件加密
  228. encrypt(temp.getAbsolutePath(),destfile,key);
  229. temp.delete();
  230. }
  232. /**
  233. *对文件srcfile进行先解密后解压缩,然后解压缩到目录destfile下
  234. *
  235. *@paramsrcfile
  236. *要解密和解压缩的文件名如c:/目标.zip
  237. *@paramdestfile
  238. *解压缩后的目录如c:/abc
  239. *@parampublicKey
  240. *公钥
  241. */
  242. public void decryptUnzip(Stringsrcfile,Stringdestfile,
  243. Stringkeyfile) throws Exception{
  244. //先对文件解密
  245. Filetemp= new File(UUID.randomUUID().toString()+ ".zip" );
  246. temp.deleteOnExit();
  247. decrypt(srcfile,temp.getAbsolutePath(), this .getKey(keyfile));
  248. //解压缩
  249. unZip(destfile,temp.getAbsolutePath());
  250. temp.delete();
  251. }
  253. public static void main(Stringargs[]) throws Exception{
  254. long a=System.currentTimeMillis();
  255. new ZipEncrypt().encryptZip( "e:/com" , "e:/comXXX/page.zip" , "e:/comXXX/public.key" );
  257. System.out.println(System.currentTimeMillis()-a);
  258. a=System.currentTimeMillis();
  260. new ZipEncrypt().decryptUnzip( "e:/comXXX/page.zip" , "e:/comxxx" , "e:/comXXX/public.key" );
  261. System.out.println(System.currentTimeMillis()-a);
  262. }
  263. }
加密:encryptZip
通过路径找到Key:getKey
解密:decryptUnzip

转自【http://topic.csdn.net/u/20081215/09/6ad763bd-a158-488a-8e5e-b34cec2a0424.html及http://www.blogjava.net/zhaochengming/archive/2007/09/03/142396.html】


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Java对文件压缩/加密/解密/解压缩的例子,DES/RSA


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