javaRegex匹配文本中想要的字串

標籤：system   void   span   blog   compile   find   pil   定義   Regex   

需求:擷取一個本地檔案中所有符合 $[MAKE_PACKAGE] 格式的字串,並輸出到另一個檔案中.

public static void main(String[] args) throws Exception {                loadVar("src/cn/don9/templates/Action.txt","src/cn/don9/templateVar/SysActionVar.txt");            }        public static void loadVar(String infilePath,String outfilePath) throws Exception{        //定義set集合,實現去重效果        Set<String> result = new HashSet<String>();        //定義Regex        String regex = "[\\$][\\[]\\w+[\\]]";        Pattern pattern = Pattern.compile(regex);                //讀取檔案        File file = new File(infilePath);        BufferedReader br = new BufferedReader(new FileReader(file));        String line;        while((line=br.readLine())!=null){            //匹配文本中每行的字串            Matcher matcher = pattern.matcher(line);            //發現匹配的字串,存入set中            while(matcher.find()){                result.add(matcher.group());            }        }                //載入輸出檔案        File outfile = new File(outfilePath);        BufferedWriter bw = new BufferedWriter(new FileWriter(outfile));        for(String var:result){            //寫入字串            bw.write(var+"\r\n");        }                br.close();        bw.close();                System.out.println("讀取完畢!");    }

運行結果:

 

javaRegex匹配文本中想要的字串