Test 10 regular expressions (Java)

Regular Expression

1. username regular expression mode (test code please download) ^ [a-z0-9 _-] {3, 15} $ ^ # line start [a-z0-9 _-] # match characters in the list, a-Z, 0-9, underline, with a length of at least 3 characters and a maximum length of 15 $ # End of line 2. password regular expression mode ((? =. * \ D )(? =. * [A-Z]) (? =. * [A-Z]) (? =. * [@ # $ %]). {6, 20}) (# Start group (? =. * \ D) # must contain a number 0-9 (? =. * [A-Z]) # It must contain a lowercase character (? =. * [A-Z]) # must contain an uppercase character (? =. * [@ # $ %]) # It must contain a special character "@ # $ %" in the list ". # Check whether all strings match the preceding conditions {6, 20} # the string length must be at least 6 Characters and the maximum length is 20) # End of group 3. hexadecimal color code Regular Expression Pattern ^ # ([A-Fa-f0-9] {6} | [A-Fa-f0-9] {3 }) $ ^ # line start # must contain a "#" symbol (# group #1 start [A-Fa-f0-9] {6} # any string in the list, with a length of 6 | #.. or any string in the [A-Fa-f0-9] {3} # list with a length of 3) # group #1 end $ # Row end 4. email Regular Expression Pattern ^ [_ A-Za-z0-9-] + (\\. [_ A-Za-z0-9-] +) * @ [A-Za-z0-9] + (\\. [A-Za-z0-9] + )*(\\. [A-Za-Z] {2,}) $ ^ # Start of the row [_ A-Za-z0-9-] + # It must start with a character in brackets Character [], must contain one or more (+) (# group #1 start \\. [_ A-Za-z0-9-] + # Next is a point ". "And the character [] in the brackets must contain one or more (+) * # The end of group #1. This group is optional (*) @ # must contain a "@" symbol [A-Za-z0-9] + # Next is the character in brackets [], must contain one or more (+) (# group #2 start-level TLD check \\. [A-Za-z0-9] + # Next is a point ". "And the character [] in the brackets must contain one or more (+) * # group #2 ends. This group is optional (*) (# group #3 Start-level TLD check \\. [A-Za-Z] {2,} # Next is a point ". "and [] characters in the brackets. The minimum length is 2) # group #3 end $ # End Row 5. image File Extension regular expression mode ([^ \ s] + (\\. (? I) (JPG | PNG | GIF | BMP) $) (# group #1 start [^ \ s] + # must contain one or more arbitrary characters (except spaces) (# group #2 start \\. # Next is a point ". "(? I) # ignore the case sensitivity check of the following characters (# group #3 Start JPG # contain the character "jpg" | #.. or PNG # contains the character "PNG" | #.. or GIF # contains the character "GIF" | #.. or BMP # contains the character "BMP") # group #3 end) # group #2 end $ # string end) # group #1 end to add one: [\ s] *? ([^ \/] *? \. Jpg) 6. IP address Regular Expression Mode ^ ([01]? \ D? | 2 [0-4] \ d | 25 [0-5]) \. ([01]? \ D? | 2 [0-4] \ d | 25 [0-5]) \. ([01]? \ D? | 2 [0-4] \ d | 25 [0-5]) \. ([01]? \ D? | 2 [0-4] \ d | 25 [0-5]) $ ^ # Start row (# group #1 start [01]? \ D? # It can be 1 to 2 digits. if three numbers appear, they must start with 0 or 1 # For example ([0-9], [0-9] [0-9], [0-1] [0-9] [0-9]) | #... or 2 [0-4] \ D # starts with 2, followed by 0-4, and ends with any number (2 [0-4] [0-9]) | #... or 25 [0-5] # Start with 2, followed by 5, and end with 0-5 (25 [0-5]) # End with group #1 \\. # Next, click ". ".... # Repeat 3 times (3x) $ # End of line 7. time Format regular expression mode 12-hour time regular expression mode (1 [012] | [1-9]): [0-5] [0-9] (\ s )? (? I) (am | PM) (# group #1 start 1 [012] # Start with 10, 11, 12 | # Or [1-9] # Start with 1, 2 ,... 9) # group #1 end: # Next is a colon (:) [0-5] [0-9] # Next is 0 .. 5 and 0 .. 9, meaning 00 to 59 (\ s )? # Next is a space (optional )(? I) # The following checks are case insensitive (am | pm) # Next is the AM or pm24 hour-based time regular expression mode ([01]? [0-9] | 2 [0-3]): [0-5] [0-9] (# group #1 start [01]? [0-9] # Start with 0-9, 1-9, 00-09,10-19 | # Or 2 [0-3] # Start with 20-23) # End with group #1: # Next is a colon (:) [0-5] [0-9] # Next is 0 .. 5 and 0 .. 9, meaning 00 to 598. date Format (dd/mm/yyyy) regular expression mode (0? [1-9] | [12] [0-9] | 3 [01])/(0? [1-9] | 1 [012])/(19 | 20) \ D) (# group #1 start 0? [1-9] #01-09 or 1-9 | #.. or [12] [0-9] #10-19 or 20-29 | #.. or 3 [01] #30, 31) # group #1 end/# Next is a "/" (# group #2 start 0? [1-9] #01-09 or 1-9 | #.. or 1 [012] #10, 11, 12) # group #2 end/# Next is a "/" (# group #3 Start (19 | 20) \ D #19 [0-9] [0-9] Or 20 [0-9] [0-9]) # group #3 end 9. regular Expression mode of HTML tags <(\ "[^ \"] * \ "| '[^'] * '| [^' \">]) *> <# Start with "<" label (# group #1 start \ "[^ \"] * \ "# Only two double quotation marks can be used in pairs-" string "| #.. or '[^'] * '# Only two single quotes can appear in pairs-'string' | #.. or [^ '\ ">] # Separate double quotation marks, single quotation marks, and"> "cannot appear ") # group #1 end * #0 or multiple times> # end label ">" end 10. HTML link regular expression mode: a tag regular expression mode in HTML (? I) <A ([^>] +)> (. + ?) </A> (# group #1 start? I # all checks are case sensitive) # group #1 end <A # Start with "<a" (# group #2 start with [^>] + # Except ("> ") any character except, at least one character) # group #2 end> # Next is "> "(. + ?) # Match all </a> # extract HTML link Regular Expression Pattern \ s *(? I) href \ s * = \ s * (\ "([^ \"] *) \ "| '[^'] * '| ([^' \"> \ s] +); \ s * # It can start with a space (? I) # all checks are case-insensitive href # Next is an "href" character \ s * = \ s * # spaces are allowed on both sides of the equal sign, (# group #1 start "([^"] * ") # Only two double quotation marks are allowed to appear in pairs-" string "| #.. or '[^'] * '# Only two single quotes are allowed in pairs-'string' | #.. or ([^ '">] +) # or separate single quotes, double quotes, and"> "are not allowed) # group #1 end D: \ Java> JAVA testten Test 1: username regular expression "j123 _" exact match "^ [a-z0-9 _-] {3,15} $ "? True Test 2: The regular expression "j123_j @" exact match "((? =. * \ D )(? =. * [A-Z]) (? =. * [A-Z]) (? =. * [@ # $ %]). {6, 20 })"? True test 3: hexadecimal color code "# af0067" exact match "^ # ([A-Fa-f0-9] {6} | [A-Fa-f0-9] {3}) $ "? True Test 4: E-mail regular expression "j1242@sina.com" exact match "^ ([_ A-Za-z0-9-] +) @ [A-Za-z0-9] + (\. [A-Za-z0-9] + )*(\. [A-Za-Z] {2,}) $ "? True Test 5: Image File Extension "j123 _. jpg" exact match "([^ \ s] + (\.(? I) (JPG | PNG | GIF | BMP) $ )"? True test 6: IP address regular expression "192.168.1.11" exact match "^ ([01]? \ D? | 2 [0-4] \ d | 25 [0-5]) \. ([01]? \ D? | 2 [0-4] \ d | 25 [0-5]) \. ([01]? \ D? | 2 [0-4] \ d | 25 [0-5]) \. ([01]? \ D? | 2 [0-4] \ d | 25 [0-5]) $ "? True Test 7: Regular Expression of time format "PM" exact match "(1 [012] | [1-9]): [0-5] [0-9] (\ s )? (? I) (am | pm )"? True test 8: Date Format (dd/mm/yyyy) "02/09/2012" exact match "(0? [1-9] | [12] [0-9] | 3 [01])/(0? [1-9] | 1 [012])/(19 | 20) \ D )"? True test 9: HTML Tag regular expression " "exact match" <("[^"] * "|' [^ '] *' | [^ '">]) *> "? True test 10: Regular Expression of HTML link "<a href = 'www .baidu.com '> www.baidu.com </a>" exact match ".*? (? I) href \ s * = \ s * ("([^"] *) "| '[^'] * '| [^'"> \ s] + ). *? "? True