《Pro Spring》学习笔记之使用properties文件进行依赖注入

发布时间：2020-12-13 20:39:14 所属栏目：百科来源：网络整理

导读：JavaBean: package ch2; public class Student ... { private StringstuName; private CoursestuCourse; public CoursegetStuCourse() ... { return stuCourse; } public void setStuCourse(CoursestuCourse) ... { this .stuCourse = stuCourse; } public S

JavaBean:

package ch2;

public class Student {
privateStringstuName;
privateCoursestuCourse;
publicCoursegetStuCourse(){
returnstuCourse;
}
publicvoidsetStuCourse(CoursestuCourse){
this.stuCourse=stuCourse;
}
publicStringgetStuName(){
returnstuName;
}
publicvoidsetStuName(StringstuName){
this.stuName=stuName;
}
}

package ch2;

public class Course {
privateStringcourseName;

publicStringgetCourseName(){
returncourseName;
}

publicvoidsetCourseName(StringcourseName){
this.courseName=courseName;
}
}

beans.properties

#配置Course
course.class=ch2.Course
#配置Course.courseName
course.courseName = shuxue
#配置Student
student.class=ch2.Student
#配置Student引用属性stuCourse
student.stuCourse(ref)=course
#配置Student.stuName
student.stuName=gaoxiang

测试代码：

主要使用DefaultListableBeanFactory和PropertiesBeanDefinitionReader这两个核心类

package ch2;

import java.io.File;
import java.io.FileInputStream;
import java.util.Properties;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.PropertiesBeanDefinitionReader;

public class TestSpring {
publicstaticvoidmain(Stringargs[])throwsException{
//获取beanfactory
BeanFactoryfactory=(BeanFactory)getBeanFactory();
Studentstu=(Student)factory.getBean("student");//这里只获取student对象,student对象中的course对象在properties文件中进行注入
System.out.println(stu.getStuName()+"'scourseis"+stu.getStuCourse().getCourseName());

}
publicstaticBeanDefinitionRegistrygetBeanFactory(){
//获取beanfactory
DefaultListableBeanFactoryfactory=newDefaultListableBeanFactory();
//创建一个definitionreader
PropertiesBeanDefinitionReaderrd=newPropertiesBeanDefinitionReader(factory);

Propertiesprops=newProperties();
try{
Stringrealpath="";
//加载配置项
realpath=System.getProperty("user.dir")+File.separator+"src"+File.separator+"ch2"+File.separator+"bean_zh_CN.properties";
props.load(newFileInputStream(realpath));
}catch(Exceptione){
e.printStackTrace();
returnnull;
}

rd.registerBeanDefinitions(props);
returnfactory;
}
}

运行结果：

gaoxiang 's course is shuxue 正如我们锁期望的那样

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!