记录几个遇到的问题和解决方法

String webroot = RequestContextUtils.getWebApplicationContext(request).getServletContext().getRealPath("/");
        //判断下tomcat下temp文件是否存在，不存在需要新建
        File folder = new File(webroot);
        if(folder.isDirectory()) {
            folder = folder.getParentFile().getParentFile();
            if(folder.isDirectory()) {
                folder = new File(folder, "temp");
                if(!folder.exists() || !folder.isDirectory()) {
                    folder.mkdir();
                }
            }
        }

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class ClassCodeTest {

    public static List<File> classFiles = new ArrayList<>();
    
    public static void main(String[] args) {
        String src = "\\src\\main\\java";
        int num = countCodeLineNum(src);
        System.out.println("目前为止共创建java文件"+classFiles.size()+"个;编写代码：("+num+")行");
    }

    public static int countCodeLineNum(String src) {
        int count = 0;
        getCountClass(new File(src), classFiles);
        for (File file : classFiles) {
            count+= getClassLineNum(file);
        }
        return count;
    }
    
    public static int getClassLineNum(File file) {
        int index = 0;
        FileReader reader = null;
        BufferedReader bufferedReader = null;
        try {
            reader = new FileReader(file);
            bufferedReader = new BufferedReader(reader);
            while(bufferedReader.readLine()!=null) {
                index++;
            }        
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            if(reader!=null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        
        return index;
    }

    public static void getCountClass(File src,List<File> classFiles) {
        File[] childrenFile = src.listFiles();
        for (File file : childrenFile) {
            if(file.exists() && file.isDirectory()) {
                getCountClass(file,classFiles);
            }else if(file.exists() && file.getName().endsWith(".java")) {
                classFiles.add(file);
            }
        }
    
    }
}