Spring框架初识（一）

<?xml version="1.0" encoding="UTF-8"?>
<!-- 导入schema
约束的位置在:
    ..\spring-framework-4.2.4.RELEASE\docs\spring-framework-reference\html\xsd-configuration.html
    文件中。
注意：要导入schema约束
-->
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                         http://www.springframework.org/schema/beans/spring-beans.xsd">
</beans>

package com.zycom.demo;
 
import org.junit.Test;
import org.springframework.context.ApplicationContext;
 
import com.zycom.service.UserService;
import com.zycom.utils.SpringUtils;
 
public class Demo1 {
      @Test
      public void t1(){
           ApplicationContext ac = SpringUtils.getApplicationContext();
           UserService us = (UserService) ac.getBean("userService");
           us.login();
           System.out.println("login成功...");
      }
}

package com.zycom.serviceimpl;
 
import org.springframework.context.ApplicationContext;
 
import com.zycom.dao.UserDao;
import com.zycom.service.UserService;
import com.zycom.utils.SpringUtils;
 
public class UserServiceImpl implements UserService {
 
      @Override
      public boolean login() {
           System.out.println("UserSerivice:登录...");
           ApplicationContext ac = SpringUtils.getApplicationContext();
           UserDao ud = (UserDao) ac.getBean("userDao");
           return ud.login();
      }
      
}

package com.zycom.utils;
 
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
public class SpringUtils {
      public static ApplicationContext  ac =null;
      static{
           ac = new ClassPathXmlApplicationContext("applicationContext.xml");
      }
      public static ApplicationContext getApplicationContext(){
           return ac;
      }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd">
 
    <!-- bean definitions here -->
    <bean id="userService" class="com.zycom.serviceimpl.UserServiceImpl"></bean>
      <bean id="userDao" class="com.zycom.daoimpl.UserDaoImpl"></bean>
</beans>

<!--在默认情况下： 它会根据默认无参构造函数来创建类对象。如果bean中没有默认无参构造函数，将会创建失败。 -->
      <bean id="customerService" class="com.itheima.service.impl.CustomerServiceImpl" />

/**
 * 模拟一个实例工厂，创建业务层实现类
 * 此工厂创建对象，必须现有工厂实例对象，再调用方法
 */
public class InstanceFactory {
    public ICustomerService createCustomerService(){
        return new CustomerServiceImpl();
    }
}

   <!-- 此种方式是：
         先把工厂的创建交给spring来管理。
        然后在使用工厂的bean来调用里面的方法
        factory-bean属性：用于指定实例工厂bean的id。
        factory-method属性：用于指定实例工厂中创建对象的方法。
    -->
    <beanid="instancFactory" class="com.itheima.factory.InstanceFactory"></bean>
    <beanid="customerService"
          factory-bean="instancFactory"
          factory-method="createCustomerService"></bean>

/**
 * 使用p名称空间注入，本质还是调用类中的set方法
 */
public class CustomerServiceImpl4 implements ICustomerService {
      
      private String name;
      private Integer age;
      private Date birthday;
      
      public void setName(String name) {
           this.name = name;
      }
      public void setAge(Integer age) {
           this.age = age;
      }
      public void setBirthday(Date birthday) {
           this.birthday = birthday;
      }
      @Override
      public void saveCustomer() {
           System.out.println(name+","+age+","+birthday);    
      }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 
          xmlns:p="http://www.springframework.org/schema/p"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation=" http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">
                                       
      <bean id="customerService"
             class="com.itheima.service.impl.CustomerServiceImpl4"
             p:name="test" p:age="21" p:birthday-ref="now"/>
</beans>

/**
 */
public class CustomerServiceImpl implements ICustomerService {
      
      private String[] myStrs;
      private List<String> myList;
      private Set<String> mySet;
      private Map<String,String> myMap;
      private Properties myProps;
      
      public void setMyStrs(String[] myStrs) {
           this.myStrs = myStrs;
      }
      public void setMyList(List<String> myList) {
           this.myList = myList;
      }
      public void setMySet(Set<String> mySet) {
           this.mySet = mySet;
      }
      public void setMyMap(Map<String, String> myMap) {
           this.myMap = myMap;
      }
      public void setMyProps(Properties myProps) {
           this.myProps = myProps;
      }
 
      @Override
      public void saveCustomer() {
           System.out.println(Arrays.toString(myStrs));
           System.out.println(myList);
           System.out.println(mySet);
           System.out.println(myMap);
           System.out.println(myProps);
      }
}