java中Regex的應用

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java.util.regex   Pattern的應用

 

 1 public static void main(String[] args) { 2         //簡單的正則匹配。從給定的字串中匹配Regex 3         //匹配到返回true  匹配不到返回false 4         String regex_0 = "(\\;|\\?|\\‘|\"|%)"; 5         String s="sx?fdfs‘sd"; 6         Pattern pattern = Pattern.compile(regex_0); 7         Matcher matcher = pattern.matcher(s); 8         boolean as=matcher.find();//返回true 匹配到? 9         boolean dd=matcher.find();//返回true 匹配到‘10         boolean ss=matcher.find();//返回false 沒有匹配到特殊符號11         12         13         String regex_1=pattern.pattern();//返回當前匹配器的Regex  (\;|\?|\‘|"|%)14         String string=pattern.toString();//返回 (\;|\?|\‘|"|%)15         16         String regex_s="\\d+";17         boolean falg=Pattern.matches(regex_s,"897");//返回 true18         19         20         String regex_2="(\\,)";21         String on="sxf,sxd,dong,leng";22         Pattern pattern2=Pattern.compile(regex_2);23         String[] ad=pattern2.split(on);//[sxf, sxd, dong, leng]24         25         String regex_3="([0-9]+)|(\\,)";26         String on2="sxf8sxs94sxy0df,hsl879dzq,xjt  45   ";27         Pattern pattern3=Pattern.compile(regex_3);28         String[] y=pattern3.split(on2);//[sxf, sxs, sxy, df, hsl, dzq, xjt  ,    ]29         String[] x=pattern3.split(on2,3);//[sxf, sxs, sxy0df,hsl879dzq,xjt  45   ](當3>0 匹配3-1次，數組長度不大於3，數組最後一個是除匹配到的剩餘的串)30         String[] z=pattern3.split(on2,9);//[sxf, sxs, sxy, df, hsl, dzq, xjt  ,    ]31         String[] h=pattern3.split(on2,-1);//[sxf, sxs, sxy, df, hsl, dzq, xjt  ,    ](當第二個參數<0,匹配次數不受限制，數組長度為任意長度)32         String[] m=pattern3.split(on2,0);//[sxf, sxs, sxy, df, hsl, dzq, xjt  ,    ]33     }

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java中Regex的應用