Spring6梳理14——依赖注入之P命名空间

以上笔记来源：
尚硅谷Spring零基础入门到进阶，一套搞定spring6全套视频教程（源码级讲解）https://www.bilibili.com/video/BV1kR4y1b7Qc

①搭建模块

②引入配置文件

③创建bean-dip.xml文件

④创建课程类文件

⑤创建学生类文件

⑥创建老师类文件

⑦创建测试类文件

⑧运行截图

⑨总结

①搭建模块

搭建方式如：spring-first

②引入配置文件

引入spring-first模块配置文件：beans.xml、log4j2.xml

引入在父模块中

引入Pom.xml文件，具体内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.haozihua</groupId><artifactId>spring6-ioc-xml</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><!--spring context依赖--><!--当你引入Spring Context依赖之后，表示将Spring的基础依赖引入了--><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>6.0.2</version></dependency><!--junit5测试--><dependency><groupId>org.junit.jupiter</groupId><artifactId>junit-jupiter-api</artifactId><version>5.6.3</version></dependency><!--log4j2的依赖--><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-core</artifactId><version>2.19.0</version></dependency><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-slf4j2-impl</artifactId><version>2.19.0</version></dependency></dependencies></project>

引入log4j2文件，具体内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<configuration><loggers><!--level指定日志级别，从低到高的优先级：TRACE < DEBUG < INFO < WARN < ERROR < FATALtrace：追踪，是最低的日志级别，相当于追踪程序的执行debug：调试，一般在开发中，都将其设置为最低的日志级别info：信息，输出重要的信息，使用较多warn：警告，输出警告的信息error：错误，输出错误信息fatal：严重错误--><root level="DEBUG"><appender-ref ref="spring6log"/><appender-ref ref="RollingFile"/><appender-ref ref="log"/></root></loggers><appenders><!--输出日志信息到控制台--><console name="spring6log" target="SYSTEM_OUT"><!--控制日志输出的格式--><PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss SSS} [%t] %-3level %logger{1024} - %msg%n"/></console><!--文件会打印出所有信息，这个log每次运行程序会自动清空，由append属性决定，适合临时测试用--><File name="log" fileName="H:/spring6_log/test.log" append="false"><PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/></File><!-- 这个会打印出所有的信息，每次大小超过size，则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩，作为存档--><RollingFile name="RollingFile" fileName="H:/spring6_log/app.log"filePattern="log/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz"><PatternLayout pattern="%d{yyyy-MM-dd 'at' HH:mm:ss z} %-5level %class{36} %L %M - %msg%xEx%n"/><SizeBasedTriggeringPolicy size="50MB"/><!-- DefaultRolloverStrategy属性如不设置，则默认为最多同一文件夹下7个文件，这里设置了20 --><DefaultRolloverStrategy max="20"/></RollingFile></appenders>
</configuration>

③创建bean-dip.xml文件

<?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:util="http://www.springframework.org/schema/util"xmlns:p="http://www.springframework.org/schema/p"xsi:schemaLocation="http://www.springframework.org/schema/utilhttp://www.springframework.org/schema/util/spring-util.xsdhttp://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd"><!--1.创建三个对象2.注入普通类型属性3.使用util:类型 定义4.在学生bean引入util:类型定义bean，完成list，map类型的注入--><!--p命名空间注入--><bean id="studentp" class="com.atguigu.spring6.iocxml.diprename.Student"p:sid="100" p:sname="mary" p:lessonList-ref="lessonList" p:teacherMap-ref="teacherMap"></bean><bean id="student" class="com.atguigu.spring6.iocxml.diprename.Student"><property name="sid" value="10000"></property><property name="sname" value="lucy"></property><property name="lessonList" ref="lessonList"></property><property name="teacherMap" ref="teacherMap"></property></bean><util:list id="lessonList"><ref bean="lessonone"></ref><ref bean="lessontwo"></ref></util:list><util:map id="teacherMap"><entry><key><value>10010</value></key><ref bean="teacherone"></ref></entry><entry><key><value>10011</value></key><ref bean="teachertwo"></ref></entry></util:map><bean id="lessonone" class="com.atguigu.spring6.iocxml.diprename.Lesson"><property name="lessonName" value="java开发"></property></bean><bean id="lessontwo" class="com.atguigu.spring6.iocxml.diprename.Lesson"><property name="lessonName" value="python开发"></property></bean><bean id="teacherone" class="com.atguigu.spring6.iocxml.diprename.Teacher"><property name="teacherId" value="101"></property><property name="teacherName" value="贾宝玉"></property></bean><bean id="teachertwo" class="com.atguigu.spring6.iocxml.diprename.Teacher"><property name="teacherId" value="102"></property><property name="teacherName" value="李时珍"></property></bean></beans>

④创建课程类文件

package com.atguigu.spring6.iocxml.diprename;/*** @package: com.atguigu.spring6.iocxml.dimap* @className: Lesson* @Description:* @author: haozihua* @date: 2024/9/26 14:39*/
public class Lesson {private String lessonName;public String getLessonName() {return lessonName;}public void setLessonName(String lessonName) {this.lessonName = lessonName;}@Overridepublic String toString() {return "Lesson{" +"lessonName='" + lessonName + '\'' +'}';}
}

⑤创建学生类文件

package com.atguigu.spring6.iocxml.diprename;import java.util.List;
import java.util.Map;/*** @package: com.atguigu.spring6.iocxml.dimap* @className: Student* @Description:* @author: haozihua* @date: 2024/8/20 15:20*/
public class Student {private List<Lesson> lessonList;//一个学生对应很多个老师private Map<String, Teacher> teacherMap;private String sid;private String sname;public List<Lesson> getLessonList() {return lessonList;}public void setLessonList(List<Lesson> lessonList) {this.lessonList = lessonList;}public String getSid() {return sid;}public void setSid(String sid) {this.sid = sid;}public String getSname() {return sname;}public void setSname(String sname) {this.sname = sname;}public Map<String, Teacher> getTeacherMap() {return teacherMap;}public void setTeacherMap(Map<String, Teacher> teacherMap) {this.teacherMap = teacherMap;}public void run() {System.out.println("学生编号： " + sid + " " + "学生名称：" + sname);System.out.println(teacherMap);for (String teacher : teacherMap.keySet()) {System.out.println(teacher);}for (Teacher teacher : teacherMap.values()) {System.out.println(teacher);}}
}

⑥创建老师类文件

package com.atguigu.spring6.iocxml.diprename;/*** @package: com.atguigu.spring6.iocxml.dimap* @className: Teacher* @Description:* @author: haozihua* @date: 2024/8/20 15:21*/
public class Teacher {private Integer teacherId;private String teacherName;public Integer getTeacherId() {return teacherId;}public void setTeacherId(Integer teacherId) {this.teacherId = teacherId;}public String getTeacherName() {return teacherName;}public void setTeacherName(String teacherName) {this.teacherName = teacherName;}@Overridepublic String toString() {return "Teacher{" +"teacherId=" + teacherId +", teacherName='" + teacherName + '\'' +'}';}public Teacher(Integer teacherId, String teacherName) {this.teacherId = teacherId;this.teacherName = teacherName;}public Teacher() {}}

⑦创建测试类文件

package com.atguigu.spring6.iocxml.diprename;import org.junit.jupiter.api.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;/*** @package: com.atguigu.spring6.iocxml.dimap* @className: TestMap* @Description:* @author: haozihua* @date: 2024/8/20 15:50*/
public class TestP {@Testpublic void Testp(){ApplicationContext context =new ClassPathXmlApplicationContext("bean-dip.xml");Student student = context.getBean("studentp", Student.class);student.run();System.out.println(student.getLessonList());}
}