Spring多配置文件

• 多配置文件的优势：
  每个文件的大小比一个文件要小很多，效率变高
  分成多模块，减少冲突
  创建俩个类

public class School {
    private String name;
    private String address;

    public School(String name, String address) {
        this.name = name;
        this.address = address;
    }

    public String getName() {
        return name;
    }

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

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", address='" + address + '\'' +
                '}';
    }
}

public class Student {
    private School school;
    private String name;
    private int age;


    public School getSchool() {
        return school;
    }

    public void setSchool(School school) {
        this.school = school;
    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "School{" +
                "school=" + school +
                ", name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}

编写xml文件，将xml文件分成三部分，第一部分是写school，第二部分是student，最后一部分是汇总

<?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="school" class="spring.ba04_多配置文件.School">
        <constructor-arg value="北京"/>
        <constructor-arg value="北大"/>
    </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="student" class="spring.ba04_多配置文件.Student" autowire="byName">
        <property name="name" value="张三"/>
        <property name="age" value="20"/>
    </bean>
</beans>

汇总，放的是绝对路径

<?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">
    <import resource="classpath:ba04/spring-student.xml"/>
    <import resource="classpath:ba04/spring-school.xml"/>
</beans>

如果汇总一个个写的话，太费事，所以我们可以使用通配符来写入，但是使用通配符要记住俩点。第一：不能自己本身写入，第二几个xml文件必须在同一目录下

<?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">
    <import resource="classpath:ba04/spring-s*.xml"/>
</beans>