employeeservice.java

来自「《精通JSP编程 》源代码(赵强那本) 很有用的源代码」· Java 代码 · 共 61 行

package edu.reumann;

import java.util.Collection;
import java.util.ArrayList;

public class EmployeeService {
    public EmployeeDTO insertEmployee( EmployeeDTO employee ) throws DatabaseException {
        //in real life call other business classes to do insert
        try {
            mimicInsert( employee );
        }
        catch( DatabaseException de ) {
            //log error
            throw de;
        }
        return employee;
    }
    
    public EmployeeDTO updateEmployee( EmployeeDTO employee ) throws DatabaseException {
        //in real life call other business classes to do update
        try {
            mimicUpdate( employee );  
        }
        catch( DatabaseException de ) {
            //log error
            throw de;
        }
        return employee;
    }
    
    //this wouldn't be in this service class, but would be in some other business class/DAO
    private void mimicInsert( EmployeeDTO employee ) throws DatabaseException {
        //to test an Exception thrown uncomment line below
        //throw new DatabaseException("Error trying to insert Employee");
    }
    //this wouldn't be in this service class, but would be in some other business class/DAO
    private void mimicUpdate( EmployeeDTO employee ) throws DatabaseException {
        //to test an Exception thrown uncomment line below
        //throw new DatabaseException("Error trying to update Employee");
    }
    
    public Collection getDepartments() {
        //call business layer to return Collection of Department beans
        //since we aren't dealing with the model layer, we'll mimic it here
        ArrayList list = new ArrayList(3);
        list.add( new DepartmentBean( 1, "Accounting"));
        list.add( new DepartmentBean( 2, "IT"));
        list.add( new DepartmentBean( 3, "Shipping"));
        return list;
    }
    public Collection getFlavors() {
        //call business layer to return Collection of Flavors
        //since we aren't dealing with the model layer, we'll mimic it here
        ArrayList list = new ArrayList(3);
        list.add( new FlavorBean( "101", "Chocolate"));
        list.add( new FlavorBean( "201", "Vanilla"));
        list.add( new FlavorBean( "500", "Strawberry"));
        return list;
    }
}