按行读取文件

按行读取文件（不乱码）

1.第一种方式

public class writetest {
  public static void main(String[] args) {
    List<String> list=new ArrayList<>();
    File filepath = new File("f://write/test.txt");
    if(filepath.isFile()&&filepath.exists())
    {
      InputStreamReader read = null;
      try {
        read = new InputStreamReader(new FileInputStream(filepath),"gbk");
        BufferedReader reader=new BufferedReader(read);
        String line;
        while ((line = reader.readLine()) != null)
        {
          list.add(line);
        }
        read.close();
      } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
      } catch (FileNotFoundException e) {
        e.printStackTrace();
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }
}

2.第二种方式

String con="";
    try {
      BufferedReader in=new BufferedReader(new InputStreamReader
       (new FileInputStream("F://3d50fbd8-2374-4cd7-a021-b29c32e4117f.txt"),"utf-8"));
      String str=null;
      while ((str=in.readLine())!=null){
        con=con+str;
      }
    } catch (UnsupportedEncodingException e) {
      e.printStackTrace();
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }