Java 文本文件的读写

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

/**
 * 
 * <b>Application name:</b><br>
 * <b>Application describing:</b> 文本文件的读写<br>

 */
public class TextFileRead
{
    /**
     * 
     * {文件读取}
     * 
     * @param srcFilePath
  
     */
    public static List<FileContent> readFile(String srcFilePath)
    {
        BufferedReader br = null;//按行读取文本文件
        List<FileContent> list = new ArrayList<FileContent>();
        try
        {
            br = new BufferedReader(new FileReader(srcFilePath));
            String line;
            FileContent fileContent;
            while ((line = br.readLine()) != null)
            {
                fileContent = new FileContent();
                fileContent.setContent(line);//设置content
                list.add(fileContent);
            }
        }
        catch (FileNotFoundException e)
        {
            // TODO Auto-generated catch block
            System.out.println("文件不存在");
            e.printStackTrace();
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            System.out.println("读取文件失败");

            e.printStackTrace();
        }finally{
            if(br!=null){
                try
                {
                    br.close();
                }
                catch (IOException e)
                {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }

        return list;
    }

    /**
     * 
     * {分配行号}
     * 
     * @param list

     */
    public static void giveRowNumber(List<FileContent> list)
    {
        if (list != null & !list.isEmpty())
        {
            for(int i=0,n=list.size();i<n;i++){
                FileContent fileContent = list.get(i);
                fileContent.setId(i+1);
            }

        }

    }

   

    /**
     * 
     * {输出文本文件}
     * 
     * @param list
     * @param dstFilePath

     */
    public static void writeFile(List<FileContent> list, String dstFilePath)
    {
        BufferedWriter bw  = null;
        try
        {
            bw = new BufferedWriter(new FileWriter(dstFilePath));
            if(list!=null&&!list.isEmpty()){
                for(FileContent fileContent :list){
                    bw.write(fileContent.getId()+" "+fileContent.getContent());
                    bw.newLine();//换行
                }
                bw.flush();
            }
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            if(bw!=null){
                try
                {
                    bw.close();
                }
                catch (IOException e)
                {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        
    }
    
    
    
    /**
     * 
     * {主函数}
     * 
     * @param args
 
     */
    public static void main(String[] args)
    {
        List<FileContent>list = readFile("c:"+File.separator+"source.txt");
        giveRowNumber(list);
        writeFile(list, "d:"+File.separator+"source.txt");

    }
    
    
    
}