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Spring Bean管理(XML方式)

时间:2020-03-17 23:58:42      阅读:43      评论:0      收藏:0      [点我收藏+]

标签:org   www   xmlns   pac   ebean   artifact   log4j   使用   name   

1.通过maven建立spring依赖:

<?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>org.yzy</groupId>
  <artifactId>springIoc</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>springIoc Maven Webapp</name>
  <!-- FIXME change it to the project‘s website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>5.2.4.RELEASE</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.2.4.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>5.2.4.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-expression -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>5.2.4.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.2</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/log4j/log4j -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>springIoc</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

2.Ioc(控制反转)将新建对象的权限赋予spring

新建applicationContext.xml:

<?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="Demo1" class="org.yzy.Demo1"></bean>     <!-- 将Demo1这个类控制反转-->
</beans>

通过Application来新建一个对象:

public void test(){
        ApplicationContext applicationContext=new ClassPathXmlApplicationContext("applicationContext.xml");
        Demo1 demo1 =(Demo1) applicationContext.getBean("Demo1");     
        demo1.sayHello();
    }

 

Spring的工厂类:

技术图片

 

 三种实例化Bean的方式

使用类构造器实例化(默认无参数):

    <!--第一种:无参构造器的方式-->
    <bean id="bean1" class="com.imooc.ioc.demo2.Bean1"/>

使用静态工厂方法实例化(简单工厂模式)

<!--第二种:静态工厂的方式-->
    <bean id="bean2" class="com.imooc.ioc.demo2.Bean2Factory" factory-method="createBean2"/>

使用实例工厂方法实例化(工厂方法模式)

    <!--第三种:实例工厂的方式-->
    <bean id="bean3Factory" class="com.imooc.ioc.demo2.Bean3Factory"/>
    <bean id="bean3" factory-bean="bean3Factory" factory-method="createBean3"/>

关于bean标签下的id、name、class和scope

 

技术图片

 

 技术图片

 

Spring Bean管理(XML方式)

标签:org   www   xmlns   pac   ebean   artifact   log4j   使用   name   

原文地址:https://www.cnblogs.com/shouyaya/p/12514564.html

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