【java小工具】从.java文件中筛选出方法，并计算出方法在这些文件中出现的次数

 package getMethod;
 import java.io.*;
 import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;

 public class GM{

     public static void main(String[] args) throws Exception{
         //获取目录下的文件
         String dir="F:\\project-cif";
         File root=new File(dir);
         //File[] files = root.listFiles();
         List<String> funs=new ArrayList<String>();
         //递归获取文件夹下所有的。java文件
         File[] files =new File[1000] ;
         List<File> allFiles=null;
         Map<String,Integer> map=new HashMap<String,Integer>();
         try {
          allFiles=showAllFiles(root);
             }
         catch (Exception e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }

         for(int i=0;i<allFiles.size();i++){
             //System.out.println(allFiles.get(i));
             files[i]=allFiles.get(i);
         }
         for(File file:files){

         if(file!= null){
             //System.out.println(file+"文件中的方法如下：");
             //funs.add(file.getAbsolutePath()+"文件中的方法如下：");
         //创建用于读取的类
             //File a=new File(file.getAbsolutePath());
             //FileInputStream b=new FileInputStream(a);
         BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(new File(file.getAbsolutePath()))));

         //对文件中每行进行遍历
         for (String line = br.readLine(); line != null; line = br.readLine()) {  

             //对每行进行正则匹配
             Pattern reg=Pattern.compile("^public[\\s\\w]+[^(class)]");
             //对line进行去空格处理trim()
             Matcher m=reg.matcher(line.trim());
             if(m.find()){
                 //1.截取字符串

                 String methodName=getMethodName(line);

                 //对字符串进行处理
                 Pattern reg1=Pattern.compile("void");
                 Pattern reg2=Pattern.compile("\\(");
                 Matcher n1=reg1.matcher(line.trim());
                 Matcher n2=reg2.matcher(line.trim());
                 if(n1.find()){
             //System.out.println(line.trim().substring(0,line.trim().length())+"");
            // funs.add(line.trim().substring(0,line.trim().length())+"");
                     map.put(line.trim().substring(0,line.trim().length()-1), 0);
                 }
                 else if(n2.find()){
                     //System.out.println(line.trim().substring(0,line.trim().length())+"");
                     //funs.add(line.trim().substring(0,line.trim().length())+"");
                     map.put(line.trim().substring(0,line.trim().length()-1), 0);
                 }

                 //将找到的存到funs
                 //funs.add(line);

                 //此处将截取方法名字段放入map中

                 //2.将method,total放入map

                 }
         }

         br.close(); 

         }    //String line=file.readLine();
         }
         for(File file:files){
             if(file!= null){

             //对文件中每行进行遍历
             for(Map.Entry<String, Integer> entry:map.entrySet()){
                 BufferedReader br1 = new BufferedReader(new InputStreamReader(new FileInputStream(new File(file.getAbsolutePath()))));

                     //System.out.println(entry.getValue()+"keyxxxxxxx"+entry.getKey());

                     //System.out.println(br.readLine()+"");
                     //System.out.println(br1.readLine()+"");

                     for (String line1 = br1.readLine(); line1 != null; line1 = br1.readLine()) {
                             //Pattern reg3=Pattern.compile(entry.getKey().substring(0,entry.getKey().length()-1)+"\\(");
                         //Matcher n3=reg3.matcher(line1.trim());
                             if(line1.contains(getMethodName(entry.getKey()))){
                                 map.put(entry.getKey(),entry.getValue()+1);
                                 //System.out.println("xxxxxxxxxxxxx");
                             }
                         //System.out.println(entry.getValue()+"keyyyyyyyyyyyyyy"+entry.getKey()+entry.getKey().substring(0,entry.getKey().length()-1));
                         }

                     br1.close();    

                     }

             }

         }
         for(Map.Entry<String, Integer> entry:map.entrySet()){
             System.out.println("方法为"+entry.getKey()+"出现次数为"+entry.getValue());

             }
          File funsfilecsv=new File("e:\\read\\funs-cif.csv");
          if(!funsfilecsv.exists()){
              funsfilecsv.createNewFile();
          }
          FileWriter fileWritter = new FileWriter(funsfilecsv.getAbsolutePath());
          BufferedWriter bufferWritter = new BufferedWriter(fileWritter);
          /*for(int i1=0;i1<funs.size();i1++){
              //System.out.println(funs.get(i1));
          bufferWritter.write("\""+funs.get(i1).toString()+"\""+"\n");
          }*/
          for(Map.Entry<String, Integer> entry:map.entrySet()){
              bufferWritter.write("\""+entry.getKey()+"\""+","+entry.getValue()+"\n");
          }
          bufferWritter.close();
         }
     public static List<File> resultfs=new ArrayList<File>();
     public static  List<File>  showAllFiles(File dir) throws Exception{
           File[] fs = dir.listFiles();

            for(int i=0; i<fs.length; i++){
            //System.out.println(fs[i].getAbsolutePath());
            if(fs[i].isDirectory()){
             try{
              showAllFiles(fs[i]);
             }catch(Exception e){}
            }else if(fs[i].getName().endsWith(".java")){
                resultfs.add(fs[i]);

            }
           }
           //Object[] files=resultfs.toArray();
          // System.out.println(files);
            //res=resultfs;

           /*for(int i=0;i<resultfs.size();i++){
               System.out.println(resultfs.get(i));
           }*/
            return resultfs;

          }
     public static String getMethodName(String str){
         String[] s=str.trim().split(" ");
         String result="";
         for(String a:s){
         //System.out.println(a);
         Pattern reg=Pattern.compile("\\(");
         Matcher b=reg.matcher(a);
         if(b.find()){
             //System.out.println(a);
             String[] s1=a.trim().split("\\(");
             //System.out.println(s1[0]+"(");
             result= s1[0]+"(";

         }
         }return result;
         }
 }