google cloud 永久免费,关键词优化排名易下拉排名,如何用excel来做网站后台,网站seo的方法学习的最大理由是想摆脱平庸#xff0c;早一天就多一份人生的精彩#xff1b;迟一天就多一天平庸的困扰。各位小伙伴#xff0c;如果您#xff1a; 想系统/深入学习某技术知识点… 一个人摸索学习很难坚持#xff0c;想组团高效学习… 想写博客但无从下手#xff0c;急需… 学习的最大理由是想摆脱平庸早一天就多一份人生的精彩迟一天就多一天平庸的困扰。各位小伙伴如果您 想系统/深入学习某技术知识点… 一个人摸索学习很难坚持想组团高效学习… 想写博客但无从下手急需写作干货注入能量… 热爱写作愿意让自己成为更好的人… 文章目录 前言7、实验六为数组类型属性赋值8、实验七为集合类型属性赋值①为List集合类型属性赋值②为Map集合类型属性赋值③引用集合类型的bean 9、实验八p命名空间10、实验九引入外部属性文件 总结 前言
7、实验六为数组类型属性赋值 8、实验七为集合类型属性赋值 ①为List集合类型属性赋值 ②为Map集合类型属性赋值 ③引用集合类型的bean 9、实验八p命名空间 10、实验九引入外部属性文件 7、实验六为数组类型属性赋值 8、实验七为集合类型属性赋值 ①为List集合类型属性赋值 ②为Map集合类型属性赋值 ③引用集合类型的bean 9、实验八p命名空间 10、实验九引入外部属性文件 7、实验六为数组类型属性赋值
①修改Student类
在Student类中添加以下代码
private String[] hobbies;public String[] getHobbies() {return hobbies;
}public void setHobbies(String[] hobbies) {this.hobbies hobbies;
}②配置bean
bean idstudentFour classcom.gedeshidai.spring.bean6.Studentproperty nameid value1004/propertyproperty namename value赵六/propertyproperty nameage value26/propertyproperty namesex value女/property!-- ref属性引用IOC容器中某个bean的id将所对应的bean为属性赋值 --property nameclazz refclazzOne/propertyproperty namehobbiesarrayvalue抽烟/valuevalue喝酒/valuevalue烫头/value/array/property
/bean8、实验七为集合类型属性赋值
①为List集合类型属性赋值
在Clazz类中添加以下代码
private ListStudent students;public ListStudent getStudents() {return students;
}public void setStudents(ListStudent students) {this.students students;
}配置bean
bean idclazzTwo classcom.gedeshidai.spring6.bean.Clazzproperty nameclazzId value4444/propertyproperty nameclazzName valueJavaee0222/propertyproperty namestudentslistref beanstudentOne/refref beanstudentTwo/refref beanstudentThree/ref/list/property
/bean若为Set集合类型属性赋值只需要将其中的list标签改为set标签即可 ②为Map集合类型属性赋值
创建教师类Teacher
package com.gedeshidai.spring6.bean;
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;}public Teacher(Integer teacherId, String teacherName) {this.teacherId teacherId;this.teacherName teacherName;}public Teacher() {}Overridepublic String toString() {return Teacher{ teacherId teacherId , teacherName teacherName \ };}
}在Student类中添加以下代码
private MapString, Teacher teacherMap;public MapString, Teacher getTeacherMap() {return teacherMap;
}public void setTeacherMap(MapString, Teacher teacherMap) {this.teacherMap teacherMap;
}配置bean
bean idteacherOne classcom.atguigu.spring6.bean.Teacherproperty nameteacherId value10010/propertyproperty nameteacherName value大宝/property
/beanbean idteacherTwo classcom.gedeshidaia.spring6.bean.Teacherproperty nameteacherId value10086/propertyproperty nameteacherName value二宝/property
/beanbean idstudentFour classcom.atguigu.spring6.bean.Studentproperty nameid value1004/propertyproperty namename value赵六/propertyproperty nameage value26/propertyproperty namesex value女/property!-- ref属性引用IOC容器中某个bean的id将所对应的bean为属性赋值 --property nameclazz refclazzOne/propertyproperty namehobbiesarrayvalue抽烟/valuevalue喝酒/valuevalue烫头/value/array/propertyproperty nameteacherMapmapentrykeyvalue10010/value/keyref beanteacherOne/ref/entryentrykeyvalue10086/value/keyref beanteacherTwo/ref/entry/map/property
/bean③引用集合类型的bean
!--list集合类型的bean--
util:list idstudentsref beanstudentOne/refref beanstudentTwo/refref beanstudentThree/ref
/util:list
!--map集合类型的bean--
util:map idteacherMapentrykeyvalue10010/value/keyref beanteacherOne/ref/entryentrykeyvalue10086/value/keyref beanteacherTwo/ref/entry
/util:map
bean idclazzTwo classcom.atguigugu.spring6.bean.Clazzproperty nameclazzId value4444/propertyproperty nameclazzName valueJavaee0222/propertyproperty namestudents refstudents/property
/bean
bean idstudentFour classcom.gedeshidai.spring6.bean.Studentproperty nameid value1004/propertyproperty namename value赵六/propertyproperty nameage value26/propertyproperty namesex value女/property!-- ref属性引用IOC容器中某个bean的id将所对应的bean为属性赋值 --property nameclazz refclazzOne/propertyproperty namehobbiesarrayvalue抽烟/valuevalue喝酒/valuevalue烫头/value/array/propertyproperty nameteacherMap refteacherMap/property
/bean使用util:list、util:map标签必须引入相应的命名空间 ?xml version1.0 encodingUTF-8?
beans xmlnshttp://www.springframework.org/schema/beansxmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexmlns:utilhttp://www.springframework.org/schema/utilxsi:schemaLocationhttp://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.xsd9、实验八p命名空间
引入p命名空间
?xml version1.0 encodingUTF-8?
beans xmlnshttp://www.springframework.org/schema/beansxmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexmlns:utilhttp://www.springframework.org/schema/utilxmlns:phttp://www.springframework.org/schema/pxsi:schemaLocationhttp://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引入p命名空间后可以通过以下方式为bean的各个属性赋值
bean idstudentSix classcom.atguigu.spring6.bean.Studentp:id1006 p:name小明 p:clazz-refclazzOne p:teacherMap-refteacherMap/bean10、实验九引入外部属性文件
①加入依赖 !-- MySQL驱动 --
dependencygroupIdmysql/groupIdartifactIdmysql-connector-java/artifactIdversion8.0.30/version
/dependency!-- 数据源 --
dependencygroupIdcom.alibaba/groupIdartifactIddruid/artifactIdversion1.2.15/version
/dependency②创建外部属性文件
jdbc.userroot
jdbc.passwordgedeshidai
jdbc.urljdbc:mysql://localhost:3306/ssm?serverTimezoneUTC
jdbc.drivercom.mysql.cj.jdbc.Driver③引入属性文件
引入context 名称空间
?xml version1.0 encodingUTF-8?
beans xmlnshttp://www.springframework.org/schema/beansxmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexmlns:contexthttp://www.springframework.org/schema/contextxsi:schemaLocationhttp://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd/beans!-- 引入外部属性文件 --
context:property-placeholder locationclasspath:jdbc.properties/注意在使用 context:property-placeholder 元素加载外包配置文件功能前首先需要在 XML 配置的一级标签 中添加 context 相关的约束。
④配置bean
bean iddruidDataSource classcom.alibaba.druid.pool.DruidDataSourceproperty nameurl value${jdbc.url}/property namedriverClassName value${jdbc.driver}/property nameusername value${jdbc.user}/property namepassword value${jdbc.password}/
/bean⑤测试
Test
public void testDataSource() throws SQLException {ApplicationContext ac new ClassPathXmlApplicationContext(spring-datasource.xml);DataSource dataSource ac.getBean(DataSource.class);Connection connection dataSource.getConnection();System.out.println(connection);
}总结
以上就是Spring之容器IOC2的相关知识点希望对你有所帮助。 积跬步以至千里积怠惰以至深渊。时代在这跟着你一起努力哦
