python获取字符串中的email
目录
调用re库,通过使用compile、findall获取字符串中的email
import re email=re.compile(r'[a-z0-9\-\.]+@[0-9a-z\-\.]+') emailtest=r'adfasldfjdsl fan02@163.com' emailset=set() for em in email.findall(emailtest): emailset.add(em) for em1 in sorted(emailset): print(em1)
修改:
通过调用函数,并动态地为字符串赋值
import re def emailre(teststr): email=re.compile(r'[a-z0-9\-\.]+@[0-9a-z\-\.]+') emailset=set() #列表 for em in email.findall(teststr): emailset.add(em) for eml in sorted(emailset): print(eml) emailtest='sdfdsgf asd03@162.com' emailre(emailtest) #或 strtest=r'sdgfsg abc@163.com' emailre(strtest)
运行结果:
从指定的字符串中提取Email:
/** * 从指定的字符串中提取Email * content 指定的字符串 */ public static String parse(String content) { String email = null; if (content==null || content.length()<1) { return email; } //找出含有@ int beginPos; int i; String token = "@"; String preHalf=""; String sufHalf = ""; beginPos = content.indexOf(token); if (beginPos>-1) { //前项扫描 String s = null; i= beginPos; while(i>0) { s = content.substring(i-1,i); if (isLetter(s)) preHalf = s+preHalf; else break; i--; } //后项扫描 i= beginPos+1; while( i<content.length()) { s = content.substring(i,i+1); if (isLetter(s)) sufHalf = sufHalf +s; else break; i++; } //判断合法性 email = preHalf + "@" + sufHalf; if (isEmail(email)) { return email; } } return null; } /** * 判断是不是合法Email * email Email地址 */ public static boolean isEmail(String email) { try { if (email==null || email.length()<1 || email.length()>256) { return false; } String check = "^([0-9a-zA-Z]+[_.0-9a-zA-Z-]+)@([a-zA-Z0-9-]+[.])+([a-zA-Z]{2,3})$"; Pattern regex = Pattern.compile(check); Matcher matcher = regex.matcher(email); boolean isMatched = matcher.matches(); if(isMatched) { return true; } else { return false; } } catch (RuntimeException e) { return false; } } /** * 判断是不是合法字符 * c 要判断的字符 */ public static boolean isLetter(String c) { boolean result = false; if (c==null || c.length()<0) { return false; } //a-z if (c.compareToIgnoreCase("a")>=0 && c.compareToIgnoreCase("z")<=0) { return true; } //0-9 if (c.compareToIgnoreCase("0")>=0 && c.compareToIgnoreCase("9")<=0) { return true; } //. - _ if (c.equals(".") || c.equals("-") || c.equals("_") ) { return true; } return result; }
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