spring5 bean的自动装配和引入外部文件

1.emp

package com.cj.spring5;

public class Emp {
    private String name;
    private Dept dept;

    public void setName(String name) {
        this.name = name;
    }

    public void setDept(Dept dept) {
        this.dept = dept;
    }
}

2.xml

<?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="emp" class="com.cj.spring5.Emp" autowire="byName"></bean>
    <bean id="dept" class="com.cj.spring5.Dept"/>
</beans>

 

3.引入外部文件

xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <bean id="emp" class="com.cj.spring5.Emp" autowire="byName"></bean>
    <bean id="dept" class="com.cj.spring5.Dept"/>


<!--    引入外部属性文件-->
    <context:property-placeholder location="classpath*:jdbc.properties"/>
    
    <bean id="druid" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${prop.driverClassName}"></property>
        <property name="url" value="${prop.url}"/>
        <property name="username" value="${prop.username}"/>
        <property name="password" value="${prop.password}"/>
    </bean>
</beans>

jdbc.properties

prop.driverClassName = com.mysql.jdbc.Driver
prop.url = jdbc:mysql://203.195.254.63:3306
prop.username = myTest
prop.password = jx22hmyDtzfHHtLy