A regular expression of Java matching Chinese characters

The code is as follows
[U4e00-u9fa5] Chinese characters? [ufe30-uffa0] Full-angle characters [U4e00-u9fa5] Chinese characters? [ufe30-uffa0] Full-angle characters

Matching regular expressions for Chinese characters: [U4E00-U9FA5]

Match Double-byte characters (including Chinese characters): [^x00-xff]

Application: Computes the length of the string (a double-byte character length meter 2,ascii character 1)

The code is as follows
String.prototype.len=function () {return This.replace ([^x00-xff]/g, "AA"). Length;}

A regular expression that matches a blank row: n[s|] *r

Regular Expression:/< (. *) >.* Matching HTML tags |< (. *)/>/

Matching a regular expression with a trailing space: (^s*) | (s*$)

If we know it, we're done.

code as follows

copy code

public static void Regxchinese () { ///String to match string s Ource = "<span title= ' 5 star hotels ' class= ' dx dx5 ' >"; //Convert the string above to lowercase //Source = Source.tolowercase (); A regular expression for the //matching string String reg_charset = "<span[^>]*?title=" ([0-9]*[s| s]*[u4e00-u9fa5]*) ' [s| S] *class= ' [a-z]*[s| S]*[a-z]*[0-9]* ' "; Pattern p = pattern.compile (Reg_charset); Matcher m = p.matcher (source); while (M.find ()) { System.out.println (M.group (1)); } } public static void Regxchinese () { ///to match string string source = "<span title=" 5 star hotels ' class= ' d x dx5 ' > '; //Convert the string above to lowercase //Source = Source.tolowercase (); A regular expression for the //matching string String reg_charset = "<span[^>]*?title=" ([0-9]*[s| s]*[u4e00-u9fa5]*) ' [s| S] *class= ' [a-z]*[s| s]*[a-z]*[0-9]* ' "; Pattern p = pattern.compile (Reg_charset); Matcher m = p.matcher (source); while (M.find ()) { System.out.println (M.group (1)); } }

Java Regular expressions can match Chinese characters, while it is also possible to write an expression with the characters

The code is as follows	Copy Code
String reg_charset = "<span[^>]*?title=" ([0-9]*[s| S]* star Hotel) ' [s| S]*class= ' [a-z]*[s| S *[a-z]*[0-9]* ' "; String reg_charset = "<span[^>]*?title=" ([0-9]*[s| S]* star Hotel) ' [s| S]*class= ' [a-z]* [s| S]*[a-z]*[0-9]* ' ";

Some common regular matching rules

Matching regular expressions for Chinese characters: [U4E00-U9FA5]

Commentary: Matching Chinese is really a headache, with this expression will be easy to do

Match Double-byte characters (including Chinese characters): [^x00-xff]

Commentary: can be used to compute the length of a string (a double-byte character length meter 2,ascii 1 characters)

A regular expression that matches a blank row: ns*r

Commentary: can be used to delete blank lines

Regular expression:< matching HTML tags (s*?) [^>]*>.*?| <.*? />

Commentary: The online version is too bad, the above can only match the part of the complex nested tags still powerless

A regular expression that matches the end-end whitespace character: ^s*|s*$

Commentary: A useful expression that can be used to delete white-space characters (including spaces, tabs, page breaks, and so on) at the end of a line at the beginning

Regular expression matching an email address: w+ ([-+.] w+) *@w+ ([-.] w+) *.w+ ([-.] w+) *

Commentary: Form validation is useful

Regular expressions that match URL URLs: [a-za-z]+://[^s]*

Commentary: Online circulation of the version of the function is very limited, which can meet the basic requirements

Match account number is legal (beginning of letter, allow 5-16 bytes, allow alphanumeric underline): ^[a-za-z][a-za-z0-9_]{4,15}$

Commentary: Form validation is useful

Match domestic phone number: D{3}-d{8}|d{4}-d{7}

Commentary: Match form such as 0511-4405222 or 021-87888822

Matching Tencent QQ Number: [1-9][0-9]{4,}

Commentary: Tencent QQ number starting from 10000

Match China ZIP Code: [1-9]d{5} (?! D

Commentary: China postal code is 6 digits

Matching ID: d{15}|d{18}

Commentary: China's ID card is 15-or 18-digit

Matching IP address: d+.d+.d+.d+

Commentary: Useful when extracting IP addresses