获取项目加载根路径，得到文件夹下的所有指定后缀文件名列表

package com.ctfo.core.util;
import java.io.File;
importjava.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import org.apache.log4j.Logger;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;
public class FileAndFolderUtil {
    
    private final static Logger logger = Logger.getLogger(FileAndFolderUtil.class);
    /**
     * 获取项目加载根路径
     * @return
     */
    public static String getClassPath(){
       String strRes = "";
       try {
           strRes = FileAndFolderUtil.class.getResource("//").toURI().getPath();
       } catch (URISyntaxException e) {
           // TODO Auto-generated catch block
//         e.printStackTrace();
           logger.info("getClassPath URISyntaxException:" + e.toString());
       }
       
       return strRes;
    }
    
    /**
     * 得到文件夹下的所有指定后缀文件名列表
     * @param strFolderPath 文件夹路径
     * @param strSuffix 需要遍历的的文件后缀
     * @param blIsAbsPath 是否采用绝对路径返回
     * @return
     */
    public static List getFileName(String strFolderPath, String strSuffix, boolean blIsAbsPath) {
       List lsFileName = new ArrayList();
       
       //用于查找文件
       File getDocument;
       if (strFolderPath == null || strFolderPath.equals("")) {
           return null;
       } else {
           if (strFolderPath.substring(strFolderPath.length()-1).equals("/")) {
               strFolderPath = strFolderPath.substring(0, strFolderPath.length()-1);
           }
           getDocument = new File(strFolderPath);
       }
       //存储文件容器
       String getFileName[];
       getFileName = getDocument.list();
       if (getFileName==null || getFileName.length<1) {
           logger.error("no file in path:" + strFolderPath + "! please check!!!");
           return null;
       }
       
       //遍历整合
       for (int i = 0; i < getFileName.length; i++) {
           //文件名合法性检查
           String strFileNameTmp = getFileName[i];
           if (strFileNameTmp.length() <= strSuffix.length()) {
               continue;
           }
           if (!strFileNameTmp.substring(strFileNameTmp.length() - strSuffix.length()).equals(strSuffix)) {
               //文件后缀不符合的情况
               continue;
           }
           //文件路径加载
           String strFileName = "";
           if (blIsAbsPath) {
               strFileName = strFolderPath + File.separator + getFileName[i];
           }else{
               strFileName = getFileName[i];
           }
           logger.debug("have loaded file =" + strFileName);
           lsFileName.add(strFileName);
       }
       return lsFileName;
    }
    
    public static String transFile2Str(String strFilePath){
       
           //创建SAXReader对象 
            SAXReader reader = new SAXReader();
            //读取文件 转换成Document 
            Document document = null;
           try {
               document = reader.read(new File(getClassPath() + strFilePath));
           } catch (DocumentException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           } 
            //document转换为String字符串 
            String documentStr = document.asXML(); 
           return documentStr;
       
    }
    
    public static List getFileName(String strFolderPath, String strSuffix){
       return getFileName(strFolderPath, strSuffix, true);
    }
    
}