java - 在文件中添加员工

Question

我想在文件中添加一名员工。
类员工/getter和setter/
EmployeeStore类

import java.util.ArrayList;
public class EmployeeStore {

    ArrayList<Employee> emp ;
    public EmployeeStore()
    {
        emp = new ArrayList<Employee>();
    }

    public void ajouter(Employee employee)
    {
        emp.add(employee);
    }
}

主类

import java.io.*;
public class EmployeeTest {
 public static void main(String[] args) {
     EmployeeStore employee = new EmployeeStore();

    try {
            BufferedWriter out = new BufferedWriter(new FileWriter("C:/Users/Akram/Documents/akram.txt")) ;
            Employee str = new Employee("Akram","Khalifa");
            employee.ajouter(str);
            StringBuilder  stringBuilder = new StringBuilder();
            stringBuilder.append( str );
           // out.write(str);
            out.close();
            System.out.println("File created successfuly");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

 }
}

文件已创建，但我在文件中找不到任何内容(文件为空)。

Answer 1

您错过了使用 fileWriter 将 stringBuilder 转储到文件中我假设您的员工有名字和姓氏属性主类应该这样编码:

  public class Main {
        public static void main(String[] args) {
             EmployeeStore employee = new EmployeeStore();

            try {

                    Employee str = new Employee("Akram","Khalifa");
                    employee.ajouter(str);
                    StringBuilder  stringBuilder = new StringBuilder();
                    stringBuilder.append( "firstName : "+str.getFirstName () + " --LastName :"+str.getLastName());
                    FileWriter writer = new FileWriter("C:/Users/Akram/Documents/akram.txt") ;
//write down ur employee in the file 
                    writer.write(stringBuilder.toString());;
                    BufferedWriter out = new BufferedWriter(writer) ;

                    out.close();
                    System.out.println("File created successfuly");
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

         }
    }