A simple example of a Java write file for Java file manipulation

The code is very simple, directly on the code, we refer to use it

package com.it.login.service;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import android.content.Context;
public class LoginService {
 

 public static boolean saveUserInfo(Context context,String username,String password){
  File file=new File(context.getFilesDir(),"user.bat"); //Under the current package, create the file
  try {
   FileOutputStream fis = new FileOutputStream(file);
   fis.write((username+"##"+password).getBytes());
   fis.close();
   return true;
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   return false;
  }

 }
 
 public static Map<String,String> getUserInfo(Context context){
  File file=new File(context.getFilesDir(),"user.bat");
  try {
   Map<String,String> map=new HashMap<String, String>();
   FileInputStream fis = new FileInputStream(file);
   BufferedReader br=new BufferedReader(new InputStreamReader(fis));
   String str=br.readLine();
   String[] infos=str.split("##");
   map.put("username", infos[0]);
   map.put("password", infos[1]);

   return map;
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();

   return null;
  }
 }
}