java 创建简单工厂模式详解编程语言

package com.zpark.service; 
 
/** 
 * 定义一个环境接口，所有省治理环境的方式都实现这个接口，并重写治理环境的方法 
 * @author tong 
 * 
 */ 
public interface Environmental { 
    public void governanceEnvironment(); 
}

package com.zpark.service.impl; 
 
 
public class BeijingEnvironmental implements Environmental{ 
    @Override 
    public void governanceEnvironment() { 
        System.out.println("【北京市治理环境的方法】"); 
    } 
}

package com.zpark.service.impl; 
 
public class TianjinEnvironmental implements Environmental{ 
    @Override 
    public void governanceEnvironment() { 
        System.out.println("【天津市治理环境的方法】"); 
    } 
}

package com.zpark.service.impl; 
 
 
public class HebeiEnvironmental implements Environmental{ 
    @Override 
    public void governanceEnvironment() { 
        System.out.println("【河北省治理环境的方法】"); 
    } 
}

package com.zpark.utils; 
 
 
public class EnvironmentalSimpleFactory { 
    //根据参数创建对象，这是一个静态方法可以直接使用类名调用 
    public static Environmental createSalary(String name) { 
        Class<Environmental> clazz = null; 
        Environmental salary = null; 
        try { 
            //利用反射机制获取该参数对应的类的对象 
            clazz = (Class<Environmental>) Class.forName(name); 
            //使用此类对象创建对应的环境类对象，这里使用父类指针指向子类对象，实现了多态 
            salary = (Environmental)clazz.newInstance(); 
        }catch (Exception e) { 
            e.printStackTrace(); 
        } 
        return salary; 
    } 
}

package com.zpark.test; 
 
import org.junit.Test; 
 
/** 
 * @author ceshi 
 * @Title: ${file_name} 
 * @Package ${package_name} 
 * @Description: ${todo} 
 * @date 2018/6/818:53 
 */ 
public class EnvironmentalJunitTest { 
    @Test 
    public void test(){ 
 
        //创建Client对象，以此对象调用computeSalary()方法传入要类型参数 
        new EnvironmentalJunitTest().computeSalaryEnvironmental("com.zpark.service.impl.BeijingEnvironmental"); 
        new EnvironmentalJunitTest().computeSalaryEnvironmental("com.zpark.service.impl.HebeiEnvironmental"); 
        new EnvironmentalJunitTest().computeSalaryEnvironmental("com.zpark.service.impl.TianjinEnvironmental"); 
 
    } 
 
    /** 
     * 根据传入的参数调用工厂类的创建环境治理方法，创建不同的薪资对象 
     * @param name 
     */ 
    public void computeSalaryEnvironmental(String name) { 
        //这里使用多态，根据传入参数的不同，生成ZhejiangSalary或者HebeiSalary对象 
        Environmental environmental = EnvironmentalSimpleFactory.createSalary(name); 
        //使用生成的对象动态调用具体类对象的方法 
        environmental.governanceEnvironment(); 
    } 
}