【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;

         }

 }