Shulou(Shulou.com)06/02 Report--

This article mainly introduces how to use JAVA treasure tool hutool. It is very detailed and has a certain reference value. Friends who are interested must finish reading it.

Contains the following components:

Introduction of engineering pom

Cn.hutool hutool-all 5.7.5

Here are some of my own experiments, paste some commonly used code examples, later you try, it is still very easy to use

String, time, amount conversion

@ Test public void testConvert () {/ * string Encoding conversion * / String a = "Hello China"; String hex = Convert.toHex (a, CharsetUtil.CHARSET_UTF_8); String raw = Convert.hexToStr (hex, CharsetUtil.CHARSET_UTF_8); System.out.println (raw); / * time conversion, millisecond to XX hours, etc. / long b = 1000 * 60 * 60 * 24 Long mins = Convert.convertTime (b, TimeUnit.MILLISECONDS, TimeUnit.HOURS); System.out.println (mins); / * * amount case conversion * / double c = 288.66; System.out.println (Convert.digitToChinese (c));}

Hello China

twenty-four

Two hundred and twenty-one hundred and twenty-eight yuan land angle land points

Date 1

@ Test public void testDateTime () throws InterruptedException {/ * * current time * / Date now = DateUtil.date (); System.out.println (now); String nowString = DateUtil.now (); System.out.println (nowString); / * * current date * / String nowDate = DateUtil.today (); System.out.println (nowDate) / * * string date yyyy-MM-dd HH:mm:ss yyyy-MM-dd HH:mm:ss yyyy-MM-dd HH:mm yyyy-MM-dd * HH:mm:ss.SSS * * DatePattern * / String dateStr = "2021-2-12"; System.out.println (DateUtil.parse (dateStr)); System.out.println (DateUtil.parse (dateStr, "yyyy-MM-dd")) / * get some part of the Date object * / System.out.println (DateUtil.year (now)); System.out.println (DateUtil.month (now) + 1); System.out.println (DateUtil.dayOfMonth (now)); System.out.println (DateUtil.hour (now, true)); System.out.println (DateUtil.minute (now)); System.out.println (DateUtil.second (now)) / * start and end time * / System.out.println (DateUtil.beginOfDay (now)); System.out.println (DateUtil.endOfDay (now)); / * * time offset * / System.out.println (DateUtil.offsetHour (now, 3)); System.out.println (DateUtil.yesterday ());}

2021-10-26 14:26:12

2021-10-26 14:26:12

2021-10-26

2021-02-12 00:00:00

2021-02-12 00:00:00

2021

ten

twenty-six

fourteen

twenty-six

twelve

2021-10-26 00:00:00

2021-10-26 23:59:59

2021-10-26 17:26:12

2021-10-25 14:26:13

Date 2

Test public void testDateTime2 () throws InterruptedException {/ * * current time * / Date now = DateUtil.date (); System.out.println (now); String nowString = DateUtil.now (); System.out.println (nowString); / * * time difference * / Date from = DateUtil.date (); Date end = DateUtil.offsetMillisecond (from, 988989898); System.out.println (DateUtil.between (from, end, DateUnit.HOUR)) System.out.println (DateUtil.between (from, end, DateUnit.DAY)); / * * format time difference, accurate to millisecond gap by default * / System.out.println ("difference:" + DateUtil.formatBetween (from, end)); / * * timer * / TimeInterval timer = DateUtil.timer (); Thread.sleep (2000L); System.out.println (timer.interval () + "ms"); timer.intervalRestart () System.out.println (timer.intervalMinute () + "min"); / * * format string DatePattern * / / * Lunar calendar * / ChineseDate chineseDate = new ChineseDate (DateUtil.parseDate ("2020-08-28")); String cyclicalYmd = chineseDate.getCyclicalYMD (); System.out.println (cyclicalYmd); / * * support for JDK 8 LocalDateTime and LocalDate * /}

2021-10-26 14:26:47

2021-10-26 14:26:47

two hundred and seventy four

eleven

Difference: 11 days 10 hours 43 minutes 9 seconds 898 milliseconds

Finite state automaton-sensitive word search

@ Test public void testDfa () {WordTree tree = new WordTree (); tree.addWord ("China"); tree.addWord ("Mobile"); tree.addWord ("Hangzhou"); tree.addWord ("Mobile Communications"); tree.addWord ("Hangzhou"); tree.addWord ("Chinese"); String text = "China Mobile in China, all Chinese, Mobile Hangyan in Hangzhou, Hangzhou" List match = tree.matchAll (text,-1, false, false); System.out.println (match);}

[China, Mobile, China, China Mobile, Hangzhou, Hangzhou]

Encryption and decryption

@ Test public void testEncDec () {String cont = "Hello"; String key = "Yw/Vz4kpJUv0+E/4/LuZEA=="; System.out.println ("aes key =" + key); AES aes = SecureUtil.aes (Base64.decode (key)); byte [] encrypt = aes.encrypt (cont); String enc = Base64.encode (encrypt); System.out.println ("ciphertext:" + enc); byte [] decrypt = aes.decrypt (enc); System.out.println (new String (decrypt)) String str = SecureUtil.md5 (cont); System.out.println ("MD5:" + str); System.out.println ("MD5 16-bit:" + DigestUtil.md5Hex16 (cont)); System.out.println ("SHA-256:" + DigestUtil.sha256Hex ("Admin@888" + "9348ierj8truigjf03wioekrutgfhj")); / / RSA RSA rsa = new RSA (); String privateKey = rsa.getPrivateKeyBase64 (); String publicKey = rsa.getPublicKeyBase64 (); System.out.println ("Private key:" + privateKey) System.out.println ("public key:" + publicKey); String rsaEnc = rsa.encryptBase64 (cont, KeyType.PublicKey); System.out.println ("encrypted:" + rsaEnc); System.out.println ("decrypted:" + rsa.decryptStr (rsaEnc, KeyType.PrivateKey)); PublicKey publicK = rsa.getPublicKey (); String modulus = HexUtil.encodeHexStr ((RSAPublicKey) publicK). GetModulus (). ToByteArray (); String exponent = HexUtil.encodeHexStr ((RSAPublicKey) publicK). GetPublicExponent (). ToByteArray ()) System.out.println (modulus); System.out.println (exponent); HMac mac = new HMac (HmacAlgorithm.HmacSHA256, "password" .getBytes ()); / / b977f4b13f93f549e06140971bded384 String macHex1 = mac.digestHex ("123"); System.out.println ("HAMC -" + macHex1); / / 3DES encryption String content = "test Chinese"; byte [] desKey = SecureUtil.generateKey (SymmetricAlgorithm.DESede.getValue ()). GetEncoded (); SymmetricCrypto des = new SymmetricCrypto (SymmetricAlgorithm.DESede, desKey) / / encrypt byte [] desEnc = des.encrypt (content); / / decrypt byte [] desDec = des.decrypt (desEnc); / / encrypt to hexadecimal string (represented by Hex) String encryptHex = des.encryptHex (content); / / decrypt to string / / String decryptStr = des.decryptStr (encryptHex); System.out.println ("3DES decryption string:" + new String (desDec));}

Aes key = Yw/Vz4kpJUv0+E/4/LuZEA==

Ciphertext: xNNdbJKZ/Ml4AWWD8YwO6A==

Hello

MD5: 8b1a9953c4611296a827abf8c47804d7

MD5 16-bit: c4611296a827abf8

SHA-256:01a83492e88f9a138e5ca0fd3ddb29b233088c70fdf2f1f511a6683b9e725f1d

Private key: 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

Public key: MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDEk5mxTabNZDVl8v7qc3DBbwnYjHOmsIrKMOjWW8rhDLOCbxgbdEr71edRqJ51IDxlxw/wWeWKv1f1fU6um78vO+YMvMch+QF7kc26Dp5Cstl7RLGTsAoilngXIoFoshblfyO5CulrwE/wieSckGmx82rOL2TCgUjoOvHE6D1t1wIDAQAB

After encryption: SF+hCQbOD5feqnE+codoDaODePYJvcvklrOZztBtoE3neNtcjAaCwAF+TzvMoELI5DDmaT2jVa5HObeW7SW2fBQ1f3xN+674z1GeblYXyo0Mr3LZmpFl5d2+VtpFGkewzBS77ThtMkk34MCq3b3nlA6DG65LC67xnDHHOtVshU8=

After decryption: Hello

00c49399b14da6cd643565f2feea7370c16f09d88c73a6b08aca30e8d65bcae10cb3826f181b744afbd5e751a89e75203c65c70ff059e58abf57f57d4eae9bbf2f3be60cbcc721f9017b91cdba0e9e42b2d97b44b193b00a22967817228168b216e57f23b90ae96bc04ff089e49c9069b1f36ace2f64c28148e83af1c4e83d6dd7

010001

HAMC-c58e5f636d1bfdfbd351d9469c308519fe6695f69c08d5f98198459c86f2a746

3DES decryption string: test Chinese

File

@ Test public void testFile () {File file = FileUtil.newFile ("/ apprun/test" + File.separator + "chiweitest-" + RandomUtil.randomString (10) + ".txt"); FileUtil.touch (file);}

Snowflake algorithm-ID generation

Test public void testId () throws InterruptedException {int machine = getMachinePiece (); int process = getProcessPiece (); System.out.println (machine + "-" + process); System.out.println ((machine&31) + "-" + (process&31)); Snowflake sf = IdUtil.getSnowflake (); / / IdUtil.createSnowflake (machine&31, process&31); Map ids = MapUtil.newConcurrentHashMap (); int counter = 10; int threadNum = 2; TimeInterval timer = DateUtil.timer () ConcurrencyTester tester = ThreadUtil.concurrencyTest (threadNum, ()-> {/ / logical content of the test for (int I = 0; I < counter; iTunes +) {ids.put (sf.nextId (), "); / / String temp = IdUtil.randomUUID (); / / ids.add (IdUtil.randomUUID ());}}); / / get the total execution time in milliseconds Console.log (tester.getInterval ()) / / get the total execution time in milliseconds System.out.println (timer.interval () + "ms"); System.out.println ("SIZE:" + ids.size ()); System.out.println (ids); System.out.println (Long.MAX_VALUE);}

738459648 Muhami 18962

0Murray 18

thirty-nine

45 ms

SIZE:20

{1452885332411842562belt, 14528853324118425611842563, 14528853324118425611842561, 1452885332411842561, 1452885332411842567, 1452885332411842564, 1452885332411842570, 1452885332411842571, 1452885332411842568, 1452885332411842569, 1452885333311842574, 14528833331184257414528283333118254254255285283333118425741452833332424242424425425425528528333324242424418425742852833332424242441842561185283333242424244254254255285283333242424241842561,14528853333118425661,14528853333118425611842566114528853333118425741452885333311842542542552852833331182542542552852833331184257428528333311842574, 14528853324118425661, 1452885333311842564, 14528853333118425442542552852833332411842574255285283333242418425442561145288533331184256414528853333118425641452885333311842564145288533331184257428528332424242424241842574255285283333242424242418425425528528333324

9223372036854775807

Network related

@ Test public void testNet () {String ip = "192.168.2.65"; long ipLong = 2130706433L; String long2ip = NetUtil.longToIpv4 (ipLong); System.out.println (long2ip); long ip2long = NetUtil.ipv4ToLong (ip); System.out.println (ip2long); / / Port probe System.out.println ("Port Connectivity:" + NetUtil.isUsableLocalPort (6379)); System.out.println ("Port valid:" + NetUtil.isValidPort (77777)) / / IP desensitized System.out.println (NetUtil.hideIpPart (ip)); / / get Nic information System.out.println (NetUtil.getNetworkInterfaces ()); / / eth5 (Realtek PCIe GBE Family Controller) System.out.println (NetUtil.getNetworkInterface ("eth5")); System.out.println (NetUtil.LOCAL_IP); System.out.println ("="); System.out.println (NetUtil.getLocalHostName ());}

127.0.0.1

3232236097

Whether the port is connected: true

Whether the port is valid: false

192.168.2.*

[name:lo (Software Loopback Interface 1), name:net0 (WAN Miniport (SSTP)), name:net1 (WAN Miniport (L2TP)), name:net2 (WAN Miniport (PPTP)), name:ppp0 (WAN Miniport (PPPOE)), name:eth0 (WAN Miniport (IPv6)), name:eth2 (WAN Miniport (Network Monitor)), name:eth3 (WAN Miniport (IP), name:ppp1 (RAS Async Adapter), name:net3 (WAN Miniport (IKEv2)), name:eth4 (Bluetooth device (personal area network)) Name:net4 (Bluetooth device (RFCOMM Protocol TDI)), name:eth5 (Realtek PCIe GBE Family Controller), name:wlan0 (Intel (R) Dual Band Wireless-AC 7260), name:net5 (Bluetooth device (RFCOMM Protocol TDI) # 2), name:eth6 (Bluetooth device (personal area Network) # 2), name:net6 (Microsoft 6to4 Adapter), name:eth7 (SecTap Adapter), name:eth7 (Sangfor SSL VPN CS Support System VNIC), name:net7 (Microsoft ISATAP Adapter # 7), name:eth8 (TAP-Windows Adapter V9) Name:net8 (Microsoft ISATAP Adapter # 5), name:eth9 (VirtualBox Host-Only Ethernet Adapter), name:eth20 (Gateway NC Adapter), name:net9 (Microsoft ISATAP Adapter), name:net10 (Microsoft ISATAP Adapter # 2), name:net11 (Microsoft ISATAP Adapter # 6), name:net12 (Microsoft ISATAP Adapter # 8), name:net13 (Microsoft ISATAP Adapter # 3), name:net14 (Microsoft ISATAP Adapter # 4), name:wlan1 (Microsoft Virtual WiFi Miniport Adapter), name:eth21 (Realtek PCIe GBE Family Controller-VirtualBox NDIS Light-Weight Filter-0000) Name:eth22 (Realtek PCIe GBE Family Controller-QoS Packet Scheduler-0000), name:eth23 (Realtek PCIe GBE Family Controller-WFP LightWeight Filter-0000), name:eth24 (Realtek PCIe GBE Family Controller-Npcap Packet Driver (NPCAP)-0000), name:wlan2 (Intel (R) Dual Band Wireless-AC 7260-VirtualBox NDIS Light-Weight Filter-0000), name:wlan3 (Intel (R) Dual Band Wireless-AC 7260-QoS Packet Scheduler-0000), name:eth25 (Realtek PCIe GBE Family Controller-VpnCDrv LightWeight Filter-0000) Name:eth26 (SecTap Adapter-VirtualBox NDIS Light-Weight Filter-0000), name:eth27 (SecTap Adapter-QoS Packet Scheduler-0000), name:eth28 (SecTap Adapter-WFP LightWeight Filter-0000), name:wlan4 (Intel (R) Dual Band Wireless-AC 7260-Npcap Packet Driver (NPCAP)-0000), name:eth29 (SecTap Adapter-Npcap Packet Driver (NPCAP)-0000), name:eth30 (WAN Miniport (Network Monitor)-Npcap Packet Driver (NPCAP)-0000), name:eth31 (WAN Miniport (Network Monitor)-VpnCDrv LightWeight Filter-0000) Name:eth32 (WAN Miniport (Network Monitor)-QoS Packet Scheduler-0000), name:eth33 (WAN Miniport (IP)-Npcap Packet Driver (NPCAP)-0000), name:eth34 (WAN Miniport (IP)-VpnCDrv LightWeight Filter-0000), name:eth35 (WAN Miniport (IP)-QoS Packet Scheduler-0000), name:eth36 (WAN Miniport (IPv6)-Npcap Packet Driver (NPCAP)-0000), name:eth37 (WAN Miniport (IPv6)-VpnCDrv LightWeight Filter-0000), name:eth38 (WAN Miniport (IPv6)-QoS Packet Scheduler-0000) Name:eth39 (Sangfor SSL VPN CS Support System VNIC-VirtualBox NDIS Light-Weight Filter-0000), name:eth40 (Sangfor SSL VPN CS Support System VNIC-QoS Packet Scheduler-0000), name:eth41 (Sangfor SSL VPN CS Support System VNIC-WFP LightWeight Filter-0000), name:eth42 (SecTap Adapter-VpnCDrv LightWeight Filter-0000), name:eth43 (Sangfor SSL VPN CS Support System VNIC-VpnCDrv LightWeight Filter-0000), name:eth44 (TAP-Windows Adapter V9-VirtualBox NDIS Light-Weight Filter-0000), name:eth45 (TAP-Windows Adapter V9-QoS Packet Scheduler-0000) Name:eth46 (TAP-Windows Adapter V9-WFP LightWeight Filter-0000), name:wlan5 (Intel (R) Dual Band Wireless-AC 7260-Virtual WiFi Filter Driver-0000), name:eth47 (TAP-Windows Adapter V9-Npcap Packet Driver (NPCAP)-0000), name:eth48 (Gateway NC Adapter-VirtualBox NDIS Light-Weight Filter-0000), name:eth49 (Gateway NC Adapter-QoS Packet Scheduler-0000), name:eth50 (Gateway NC Adapter-WFP LightWeight Filter-0000), name:eth51 (Gateway NC Adapter-Npcap Packet Driver (NPCAP)-0000) Name:eth52 (TAP-Windows Adapter V9-VpnCDrv LightWeight Filter-0000), name:eth53 (Bluetooth device (personal area Network) # 2-Npcap Packet Driver (NPCAP)-0000), name:eth54 (Gateway NC Adapter-VpnCDrv LightWeight Filter-0000), name:wlan6 (Intel (R) Dual Band Wireless-AC 7260-Native WiFi Filter Driver-0000), name:wlan7 (Intel (R) Dual Band Wireless-AC 7260-VpnCDrv LightWeight Filter-0000), name:wlan8 (Intel (R) Dual Band Wireless-AC 7260-WFP LightWeight Filter-0000) Name:ppp2 (RAS Async Adapter-Npcap Packet Driver (NPCAP)-0000)]

Name:eth5 (Realtek PCIe GBE Family Controller)

127.0.0.1

= =

Chiwei-PC

URL correlation

@ Test public void testUrl () {System.out.println (URLUtil.toURI ("/ / www.yisu.com/df/sdf/df"). GetHost ();} above is all the content of the article "how to use hutool, a JAVA Treasure tool". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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