Spring整理5 -- 模块的组装

如何实现三个模块良好的切换？

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配置文件

<beans>       <bean id="dao" name="code">package dao; public interface IDAO {       public boolean login(String account,String password);} package dao; public class StudentDao implements IDAO {        public boolean login(String account, String password) {              System.out.println("Student登陆，账号:" + account + " 密码:" + password);              return false;       }} package dao; public class CustomerDao implements IDAO {        public boolean login(String account, String password) {              System.out.println("Customer登陆，账号:" + account + " 密码:" + password);              return false;       } } package caller; import dao.IDAO; public class DaoCaller {       private IDAO dao;//设置成为一个属性       public IDAO getDao() {              return dao;       }       public void setDao(IDAO dao) {              this.dao = dao;       }       public void callDao(String account,String password){              dao.login(account, password);       }} package main; import org.springframework.context.ApplicationContext;import org.springframework.context.support.FileSystemXmlApplicationContext; import caller.DaoCaller; public class MainModule {        public static void main(String[] args) {              ApplicationContext context = new FileSystemXmlApplicationContext("applicationContext.xml");              DaoCaller caller = (DaoCaller)context.getBean("caller");              caller.callDao("111", "34;gd");        } }

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