通过依赖注入来从不同的部门获取数据，借助其来理解Spring的IOC
package com.xl.ioc.demo;
public interface DataManagement {
//使用该方法来获取数据
public void getData();
}
package com.xl.ioc.demo;
public class DepartmentAData implements DataManagement {
@Override
public void getData() {
//使用该方法来从部门A获取数据
System.out.println("======从部门A获取数据========");
}
}
package com.xl.ioc.demo;
public class DepartmentBData implements DataManagement {
@Override
public void getData() {
//使用该方法来从部门B获取数据
System.out.println("======从部门B获取数据========");
}
}
package com.xl.ioc.demo;
public class DepartmentCData implements DataManagement {
@Override
public void getData() {
//使用该方法来从部门C获取数据
System.out.println("======从部门C获取数据========");
}
}
package com.xl.ioc.demo;
public class Business {
private DataManagement dm;
public void setDm(DataManagement dm) {
this.dm = dm;
}
//根据注入的获取数据
public void getData() {
dm.getData();
}
}
package com.xl.ioc.demo;
public class Test {
public static void main(String[] args) {
Business business = new Business();
// business.setDm(new DepartmentAData());
// business.setDm(new DepartmentBData());
business.setDm(new DepartmentCData());
business.getData();
}
}