Spring向Bean内部注入Null和空字符-----Spring框架

野性酷女 2024-03-23 18:13 113阅读 0赞

>     <?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/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
>         
>         <bean id="OrderDao" class="com.powernode.spring6.dao.OrderDao"/>
>         <bean id="OrderService" class="com.powernode.spring6.service.OrderService">
>             
>             <property name="orderDao" ref="OrderDao"/>
>         </bean>
>         <bean id="OS" class="com.powernode.spring6.service.OrderService">
>             <property name="orderDao">
>                 
>                 <bean class="com.powernode.spring6.dao.OrderDao"/>
>             </property>
>         </bean>
>         <bean id="User" class="com.powernode.spring6.Bean.User">
>             
>             <property name="username" value="张三"/>
>             <property name="age" value="20"/>
>             <property name="password" value="123456"/>
>         </bean>
>         <bean id="SimpleValueType" class="com.powernode.spring6.Bean.SimpleValueType">
>             <property name="age" value="20"/>
>             <property name="ages" value="20"/>
>             <property name="username" value="张三"/>
>             <property name="flag" value="false"/>
>             <property name="F" value="false"/>
>             <property name="seasons" value="WINTER"/>
>             <property name="clazz" value="java.lang.String"/>
>             <property name="c" value="男"/>
>             <property name="character" value="女"/>
>             <property name="f" value="true"/>
>             
>             <property name="birthday" value="Fri Aug 04 11:48:02 CST 2023"/>
>         </bean>
>         <bean id="MyDataSource" class="com.powernode.spring6.jdbc.MyDataSource">
>             <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
>             <property name="url" value="jdbc:mysql://localhost:13306/spring6"/>
>             <property name="username" value="root"/>
>             <property name="password" value="abc123"/>
>         </bean>
>         <bean id="Cat" class="com.powernode.spring6.Bean.Cat">
>     
>     
>     
>     
>     
>     
>             <property name="name" value=""/>
>     
>             <property name="age" value="3"/>
>         </bean>
>     </beans>
> 
>     <?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/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
>         
>         <bean id="OrderDao" class="com.powernode.spring6.dao.OrderDao"/>
>         <bean id="OrderService" class="com.powernode.spring6.service.OrderService">
>             
>             <property name="orderDao" ref="OrderDao"/>
>         </bean>
>         <bean id="OS" class="com.powernode.spring6.service.OrderService">
>             <property name="orderDao">
>                 
>                 <bean class="com.powernode.spring6.dao.OrderDao"/>
>             </property>
>         </bean>
>         <bean id="User" class="com.powernode.spring6.Bean.User">
>             
>             <property name="username" value="张三"/>
>             <property name="age" value="20"/>
>             <property name="password" value="123456"/>
>         </bean>
>         <bean id="SimpleValueType" class="com.powernode.spring6.Bean.SimpleValueType">
>             <property name="age" value="20"/>
>             <property name="ages" value="20"/>
>             <property name="username" value="张三"/>
>             <property name="flag" value="false"/>
>             <property name="F" value="false"/>
>             <property name="seasons" value="WINTER"/>
>             <property name="clazz" value="java.lang.String"/>
>             <property name="c" value="男"/>
>             <property name="character" value="女"/>
>             <property name="f" value="true"/>
>             
>             <property name="birthday" value="Fri Aug 04 11:48:02 CST 2023"/>
>         </bean>
>         <bean id="MyDataSource" class="com.powernode.spring6.jdbc.MyDataSource">
>             <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
>             <property name="url" value="jdbc:mysql://localhost:13306/spring6"/>
>             <property name="username" value="root"/>
>             <property name="password" value="abc123"/>
>         </bean>
>         <bean id="Cat" class="com.powernode.spring6.Bean.Cat">
>     
>     
>     
>     
>     
>     
>             <property name="name" value=""/>
>     
>             <property name="age" value="3"/>
>         </bean>
>     </beans>

>     package com.powernode.spring6.Bean;
>     
>     public class Cat
>     {
>         private String name;
>         private int age;
>     
>         @Override
>         public String toString() {
>             return "Cat{" +
>                     "name='" + name + '\'' +
>                     ", age=" + age +
>                     '}';
>         }
>     
>         public void setName(String name) {
>             this.name = name;
>         }
>     
>         public String getName() {
>             return name;
>         }
>     
>         public void setAge(int age) {
>             this.age = age;
>         }
>     }
> 
>     package com.powernode.spring6.Bean;
>     
>     public class Cat
>     {
>         private String name;
>         private int age;
>     
>         @Override
>         public String toString() {
>             return "Cat{" +
>                     "name='" + name + '\'' +
>                     ", age=" + age +
>                     '}';
>         }
>     
>         public void setName(String name) {
>             this.name = name;
>         }
>     
>         public String getName() {
>             return name;
>         }
>     
>         public void setAge(int age) {
>             this.age = age;
>         }
>     }

>     @Test
>         public void TestNull()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("set-di.xml");
>             Cat cat = applicationContext.getBean("Cat", Cat.class);
>             System.out.println(cat.getName());
>             System.out.println(cat);
>         }
> 
>     @Test
>     public void TestNull()
>     {
>         ApplicationContext applicationContext = new ClassPathXmlApplicationContext("set-di.xml");
>         Cat cat = applicationContext.getBean("Cat", Cat.class);
>         System.out.println(cat.getName());
>         System.out.println(cat);
>     }