Java 读取文件

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
public class TestReadFile
{
    public static void main(String[] args)
    {
        String FilePath = "D:/test.txt";
        FileReader fr = null;
        BufferedReader br = null;
        StringBuffer sBuffer = new StringBuffer();
        try
        {
            try
            {
                fr = new FileReader(FilePath);// 建立FileReader对象，并实例化为fr
            }
            catch (FileNotFoundException e)
            {
                e.printStackTrace();
            }
            br = new BufferedReader(fr);// 建立BufferedReader对象，并实例化为br
            String Line = br.readLine();// 从文件读取一行字符串
            // 判断读取到的字符串是否不为空
            while (Line != null)
            {
                sBuffer.append(Line);
                sBuffer.append("\n");
                Line = br.readLine();// 从文件中继续读取一行数据
            }
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        finally
        {
            try
            {
                if (br != null)
                    br.close();// 关闭BufferedReader对象
                if (fr != null)
                    fr.close();// 关闭文件
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
        // 输出读取的结果
        System.out.println(sBuffer);
    }
}