java读取文件之txt文本

1.方法一：

public static String txt2String(File file){
13         String result = "";
14         try{
15             BufferedReader br = new BufferedReader(new FileReader(file));//构造一个BufferedReader类来读取文件
16             String s = null;
17             while((s = br.readLine())!=null){//使用readLine方法，一次读一行
18                 result = result + "\n" +s;
19             }
20             br.close();
21         }catch(Exception e){
22             e.printStackTrace();
23         }
24         return result;
25     }
26
27     public static void main(String[] args){
28         File file = new File("D:/luceneData/test1.txt");
29         System.out.println(txt2String(file));
30     }

2.方法二：
public static void readTxtFile(String filePath){

        try {

                String encoding="GBK";

                File file=new File(filePath);

                if(file.isFile() && file.exists()){ //判断文件是否存在

                    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){

                        System.out.println(lineTxt);

                    }

                    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();

        }

     

    }

     

    public static void main(String argv[]){

        String filePath = "L:\\Apache\\htdocs\\res\\20121012.txt";

 

        readTxtFile(filePath);

    }