抽象工廠模式實現數據訪問（java 反射+配置文件）

話不多說，代碼如下：

package reflectAbstractFactory.user;

public class User {
    private long id;
    private String name;
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

package reflectAbstractFactory.user;

public interface IUser {
    void insert(User user);
    void getUser(int id);
}

package reflectAbstractFactory.user;

public class AccessUser implements IUser {
    @Override
    public void insert(User user) {
        System.out.println("在Access數據庫的user表插入一條記錄");
    }
    @Override
    public void getUser(int id) {
        System.out.println("在Access數據庫的user表根據ID獲取一條記錄");
    }
}

package reflectAbstractFactory.user;

public class SqlServerUser implements IUser {

    @Override
    public void insert(User user) {
        System.out.println("在SqlServer數據庫的user表插入一條記錄");
    }

    @Override
    public void getUser(int id) {
        System.out.println("在SqlServer數據庫的user表根據ID獲取一條記錄");
    }

}

package reflectAbstractFactory.dept;

public class Department {
    private long id;
    private String deptName;
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public String getDeptName() {
        return deptName;
    }
    public void setDeptName(String deptName) {
        this.deptName = deptName;
    }
    
}

package reflectAbstractFactory.dept;

public interface IDepartment {
    void insert(Department dept);
    void getDept(int id);
}

package reflectAbstractFactory.dept;

public class AccessDepartment implements IDepartment {

    @Override
    public void insert(Department dept) {
        System.out.println("在Access數據庫的department表插入一條記錄");
    }

    @Override
    public void getDept(int id) {
        System.out.println("在Access數據庫的department表根據ID獲取一條記錄");
    }

}

package reflectAbstractFactory.dept;

public class SqlServerDepartment implements IDepartment {

    @Override
    public void insert(Department dept) {
        System.out.println("在SqlServer數據庫的department表插入一條記錄");
    }

    @Override
    public void getDept(int id) {
        System.out.println("在SqlServer數據庫的department表根據ID獲取一條記錄");
    }

}

package reflectAbstractFactory;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Iterator;
import java.util.Properties;

import reflectAbstractFactory.dept.IDepartment;
import reflectAbstractFactory.user.IUser;

public class ReflectSqlFactory {
    public String getDb() {
        Properties prop = new Properties();
        String db = "";
        try {
            InputStream in = new BufferedInputStream(new FileInputStream(
                    "E:/sql.properties"));
            prop.load(in); // /加載屬性列表
            Iterator<String> it = prop.stringPropertyNames().iterator();
            while (it.hasNext()) {
                String key = it.next();
                if("db".endsWith(key)){
                    db = prop.getProperty("db");
                    break;
                }
            }
            in.close();
        } catch (Exception e) {
            System.out.println(e);
        }
        return db;
    }
    public Class<?> getsqlFactory(String pge,String type) throws ClassNotFoundException{
        String className= "reflectAbstractFactory."+pge+getDb()+type;
        System.out.println(className);
        Class<?> c1 = Class.forName(className);
        System.out.println(c1.getName());
        return c1;
    }
    public IUser createUser() throws InstantiationException, IllegalAccessException, ClassNotFoundException{
        Class<?> c = getsqlFactory("user.","User");
        IUser iu = (IUser)c.newInstance();
        return iu;
    };
    public IDepartment createDept() throws ClassNotFoundException, InstantiationException, IllegalAccessException{
        Class<?> c = getsqlFactory("dept.","Department");
        IDepartment id = (IDepartment)c.newInstance();
        return id;
    };
}

package reflectAbstractFactory;

import reflectAbstractFactory.dept.Department;
import reflectAbstractFactory.dept.IDepartment;
import reflectAbstractFactory.user.IUser;
import reflectAbstractFactory.user.User;

public class Business {

    public static void main(String[] args) throws InstantiationException, IllegalAccessException, ClassNotFoundException {
        //產品1系列
        User user = new User();
        ReflectSqlFactory reflectSqlFactory = new ReflectSqlFactory();
        IUser iuDao = reflectSqlFactory.createUser();
        iuDao.insert(user);
        iuDao.getUser(1);
        
        //產品2系列
        Department dept = new Department();
        IDepartment idepatDao = reflectSqlFactory.createDept();
        idepatDao.insert(dept);
        idepatDao.getDept(1);     
    }
}