employeetest.java

来自「java 完全探索的随书源码」· Java 代码 · 共 72 行

import java.io.*;

public class EmployeeTest
{
  // Used to keep from hard-coding the filename in multiple places
  public static final String EMPLOYEE_FILE = "employees.dat";

  public static void main(String[] args)
  {
    // Create a few employees
    Employee employee1 = new Employee( "Zachary", "Cavaness", 10.25f, 40 );
    Employee employee2 = new Employee( "Joshua", "Cavaness", 10.25f, 40 );
    Employee employee3 = new Employee( "Tracy", "Cavaness", 21.50f, 40 );

    try
    {
      // Create the File and Object streams to serialize to the file
      FileOutputStream out = new FileOutputStream( EmployeeTest.EMPLOYEE_FILE );
      ObjectOutputStream objOutStr = new ObjectOutputStream( out );
      objOutStr.writeObject( employee1 );
      objOutStr.writeObject( employee2 );
      objOutStr.writeObject( employee3 );

      // close the open resources
      objOutStr.close();
      out.close();
    }
    catch( FileNotFoundException ex )
    {
      System.out.println( "Could not create the employee file" );
      System.exit(-1);
    }
    catch( IOException ex )
    {
      System.out.println( "Could not serialize the employees" );
      System.exit(-1);
    }

    // Read the employees back in
    try
    {
      Object obj = null;
      // Create the file and object streams
      FileInputStream in = new FileInputStream( EmployeeTest.EMPLOYEE_FILE );
      ObjectInputStream objInStr = new ObjectInputStream( in );

      // In this example, we will keep going until the EOFException is
      // raised and then we will catch that exception and stop
      while( true )
      {
        obj = objInStr.readObject();
        System.out.println( obj );
      }
    }
    catch( EOFException ex )
    {
      System.out.println( "All records have been read in" );
    }
    catch( FileNotFoundException ex )
    {
      System.out.println( "Could not create the employee file" );
    }
    catch( IOException ex )
    {
      System.out.println( "Could not serialize the employees" );
    }
    catch( ClassNotFoundException ex )
    {
      System.out.println( "Could not find the class definition for serialized class" );
    }
  }
}