設(shè)計模式，

架構(gòu)設(shè)計實例，

使用到了工廠模式、單例模式、反射、泛型等

項目包結(jié)構(gòu)如下圖：

1.bean包

(1)Base.java父類

package test.bean;

public class Base {

private String name;

private String age;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getAge() {

return age;

}

public void setAge(String age) {

this.age = age;

}

}

(2)Student.java學(xué)生類

package test.bean;

public class Student extends Base {

private String schoolbag;

public String getSchoolbag() {

return schoolbag;

}

public void setSchoolbag(String schoolbag) {

this.schoolbag = schoolbag;

}

}

(3)Teacher.java教師類

package test.bean;

public class Teacher extends Base {

private String bag;

public String getBag() {

return bag;

}

public void setBag(String bag) {

this.bag = bag;

}

}

2.factory工廠包

(1)factory.properties

1=test.factory.StudentServiceFactoryImpl

2=test.factory.TeacherServiceFactoryImpl

(2)FactoryUtil.java

package test.factory;

import java.io.IOException;

import java.io.InputStream;

import java.util.HashMap;

import java.util.Map;

import java.util.Properties;

import test.service.IService;

import test.factory.IServiceFactory;

public class FactoryUtil {

//裝載配置

private Properties info = new Properties();

//保存各種渠道服務(wù)類列表，確保為每個機票服務(wù)類只生成一個對象

private Map service = new HashMap();

private volatile static FactoryUtil factoryUtil;

private FactoryUtil(){

init();

}

public void init(){

InputStream is = null;

try{

is=

FactoryUtil.class.getResourceAsStream("factory.properties");

info.load(is);

}catch(Exception e){

e.printStackTrace();

throw new ExceptionInInitializerError(e);

}finally{

if(is!=null){

try {

is.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

public static FactoryUtil getInstance(){

if(factoryUtil==null){

synchronized(FactoryUtil.class){

if(factoryUtil==null){

factoryUtil = new FactoryUtil();

}

}

}

return factoryUtil;

}

public IService getService(Integer patten){

String mode = String.valueOf(patten);

//如果該map已經(jīng)里包含了該service就不需要再通過下面的反射再獲取了

if(service.containsKey(mode)){

return service.get(mode);

}

String classPath = info.getProperty(mode);

try {

Object obj = Class.forName(classPath).newInstance();

IServiceFactory factory = (IServiceFactory)obj;

IService iservice = factory.createService();

service.put(mode, iservice);

return iservice;

} catch (ClassNotFoundException e) {

throw new RuntimeException("沒有找到與“"+mode+"”對應(yīng)的工廠實現(xiàn)類",e);

} catch (InstantiationException e) {

throw new RuntimeException("沒有找到與“"+mode+"”對應(yīng)的工廠實現(xiàn)類",e);

} catch (IllegalAccessException e) {

throw new RuntimeException("沒有找到與“"+mode+"”對應(yīng)的工廠實現(xiàn)類",e);

}

}

}

(3)IServiceFactory.java

package test.factory;

import test.service.IService;

public interface IServiceFactory {

public IService createService();

}

(4)StudentServiceFactoryImpl.java

package test.factory;

import test.service.IService;

import test.service.StudentServiceImpl;

public class StudentServiceFactoryImpl implements

IServiceFactory {

public IService createService() {

// TODO Auto-generated method stub

return new StudentServiceImpl();

}

}

(5)TeacherServiceFactoryImpl.java

package test.factory;

import test.service.IService;

import test.service.TeacherServiceImpl;;

public class TeacherServiceFactoryImpl implements

IServiceFactory {

public IService createService() {

// TODO Auto-generated method stub

return new TeacherServiceImpl();

}

}

3.service包

(1)IService.java

package test.service;

public interface IService {

public T doWork(String request);

public T getPerson(String request);

public void eat();

}

(2)StudentServiceImpl.java

package test.service;

import test.bean.Student;

public class StudentServiceImpl implements IService {

public String doWork(String request) {

// TODO Auto-generated method stub

return "工作：學(xué)生做"+request+"作業(yè)";

}

public Student getPerson(String request) {

// TODO Auto-generated method stub

Student student = new Student();

student.setName("小明");

student.setAge("8");

student.setSchoolbag("喜羊羊牌書包");

return student;

}

public void eat() {

// TODO Auto-generated method stub

System.out.println("吃飯：學(xué)生吃飯");

}

}

(3)TeacherServiceImpl.java

package test.service;

import test.bean.Teacher;

public class TeacherServiceImpl implements IService {

public String doWork(String request) {

// TODO Auto-generated method stub

return "工作：老師批改"+request+"作業(yè)";

}

public Teacher getPerson(String request){

Teacher teacher = new Teacher();

teacher.setName("陳老師");

teacher.setAge("28");

teacher.setBag("LV男士皮包");

return teacher;

}

public void eat() {

// TODO Auto-generated method stub

System.out.println("吃飯：老師吃飯");

}

}

4.Test測試包

Test.java

package test;

import test.bean.Student;

import test.factory.FactoryUtil;

import test.service.IService;

public class Test {

public static void main(String[] args) {

// TODO Auto-generated method stub

IService iservice = FactoryUtil.getInstance().getService(1);//1 學(xué)生

2老師

//1.通過泛型獲得對象Object然后強轉(zhuǎn)為想要的類型

String returnStr = (String)iservice.doWork("數(shù)學(xué)");

System.out.println(returnStr);//打印內(nèi)容：工作：學(xué)生做數(shù)學(xué)作業(yè)

//2.同上，通過泛型獲得對象Object然后強轉(zhuǎn)為想要的類型

Student student = (Student)iservice.getPerson("喜洋洋");

System.out.println(student.getName()+",年齡是"+student.getAge()+"歲,書包是"+student.getSchoolbag());//打印內(nèi)容：小明,年齡是8,書包是喜羊羊牌書包

//3.直接調(diào)接口的eat()方法

iservice.eat();//打印內(nèi)容：吃飯：學(xué)生吃飯

}

}

注:有問題希望大家指出，原創(chuàng)，轉(zhuǎn)載請注明出處。

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