【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()+"""+"
");
         }*/
         for(Map.Entry<String, Integer> entry:map.entrySet()){
             bufferWritter.write("""+entry.getKey()+"""+","+entry.getValue()+"
");
         }
         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;
        }
}