[工具类] 文件

package com.claw.util.file;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.util.StringUtils;

import com.claw.util.string.StringUtil;

public class FileUtil {
    
    public static void main(String[] args) {}
    
    public static List<String> readFile(String filePath){
        List<String> list = new ArrayList<String>();
        try {
                String encoding="UTF-8";
                File file=new File(filePath);
                //判断文件是否存在
                if(file.isFile() && file.exists()){ 
                    InputStreamReader read = new InputStreamReader(new FileInputStream(file),encoding);//考虑到编码格式
                    BufferedReader bufferedReader = new BufferedReader(read);
                    String lineTxt = null;
                    while((lineTxt = bufferedReader.readLine()) != null){
                        List<String> lineList  = StringUtil.getLine(lineTxt+"\t");
                        if(lineList!=null && lineList.size()==4){
                            String url = lineList.get(3);
                            if(!"".equals(url)){
                                list.add(url);
                            }
                        }else{
                            break;
                        }
                    }
                    read.close();
        }else{
            System.out.println("找不到指定的文件");
        }
        } catch (Exception e) {
            System.out.println("读取文件内容出错");
            e.printStackTrace();
        }
        return list;
    }
    
}