Spring Framework------>version4.3.5.RELAESE----->应用实例------->测试spring framework的IOC功能

step1，确保你的project中已经包含了spring的beans/context/core/expression、三方logging模块，

• • <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/maven-v4_0_0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>bupt.jinmensuyin</groupId>
      <artifactId>TestSpring</artifactId>
      <packaging>war</packaging>
      <version>0.0.1-SNAPSHOT</version>
      <name>TestSpring Maven Webapp</name>
      <url>http://maven.apache.org</url>
      <dependencyManagement>
        <dependencies>
            <!-- BOM:bill of materials,其实就是一个列表，该列表中描述了spring framework各个模块及其唯一的版本号，
            引入BOM之后，下面再引入spring framework的各个module时，就可以省略<version>标签,maven会自动查询BOM来
            得知应该引入该module的哪个版本 -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-framework-bom</artifactId>
                <version>4.3.5.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
      </dependencyManagement>
      <dependencies>
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>3.8.1</version>
          <scope>test</scope>
        </dependency>
        <!-- spring framework的spring-context模块提供依赖注入功能 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <exclusions>
                <!-- exclusion:排除
                    这里的配置将commons-logging这个三方日志库文件从spring-core模块中排除出去，
                    这样一来spring framework的所有模块都没有了logging插件
                    （为什么Exclude the dependency from the spring-core module就等于从整个spring framework
                    的所有module中都排除了commons-logging?
                    答：因为the spring-core module is the only module that explicitly显式地 depends on
                     commons-logging，spring framework的其他module都是基于spring-core的，
                    其他module通过spring-core获得commons-logging提供的功能)） -->
                <exclusion>
                    <groupId>commons-logging</groupId>
                    <artifactId>commons-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!-- 排除了spring framework中本身带有的commons-logging之后，要继承其他的三方log插件来管理日志
             You need to supply 4 dependencies: the bridge, the SLF4J API, 
             the binding to Log4J, and the Log4J implementation itself.-->
        <!-- 在spring framework和SLF4J之间架起桥梁，使得logging calls from within Spring 
            will be translated into logging calls to the SLF4J API,  -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>1.5.8</version>
        </dependency>
        <!-- the SLF4J API,  -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.5.8</version>
        </dependency>
        <!-- 在SLF4J和Log4J之间架起桥梁 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.5.8</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.12</version>
        </dependency>
      </dependencies>
      <build>
        <finalName>TestSpring</finalName>
      </build>
      <repositories>
          <!-- 添加了如下配置之后，就不从maven中央仓库下载相关jar包，而是从如下url下载相关jar包
          到maven本地仓库 -->
        <repository>
            <id>io.spring.repo.maven.release</id>
            <url>http://repo.spring.io/release/</url>
            <snapshots><enabled>false</enabled></snapshots>
        </repository>
      </repositories>
    </project>

    　　

step2，创建bean类（这三个文件放在“工程名/src/test/java”文件夹下）

• • package java;
    
    public interface Person {
        public String sayHello(String name);
        public String sayGoodBey(String name);
    }

    package java;
    
    public class Chinese implements Person {
    
        @Override
        public String sayHello(String name) {
            // TODO Auto-generated method stub
            return "你好 "+name;
        }
    
        @Override
        public String sayGoodBey(String name) {
            // TODO Auto-generated method stub
            return "再见 "+name;
        }
    
    }

    package java;
    
    public class American implements Person {
    
        @Override
        public String sayHello(String name) {
            // TODO Auto-generated method stub
            return "hello "+name;
        }
    
        @Override
        public String sayGoodBey(String name) {
            // TODO Auto-generated method stub
            return "GoodBey "+name;
        }
    
    }

step3，使用spring的IOC容器管理bean

• • 本例中使用的是xml-based configuration

    <?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 name="american" class="java.American"/>
    
        <bean name="chinese" class="java.Chinese"/>
    
    </beans>

    该配置文件存放路径——工程名/src/test/resources/SpringMVC/ctx-cache.xml

step4，初始化IOC容器，并且获取其中定义的bean，并做出后续操作

• • 工程名/src/test/java/TestIoC.java　

    package java;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.FileSystemXmlApplicationContext;
    
    
    public class TestIoC {
        public static void main(String[] args){
            ApplicationContext ctx=new FileSystemXmlApplicationContext("src/resources/SpringXML/ctx-cache.xml");
            Person p=(Person) ctx.getBean("american");
            System.out.println(p.sayHello("lxrm"));
            p=(Person) ctx.getBean("chinese");
            System.out.println(p.sayHello("陈"));
        }
    }

    运行上述程序，应该输出结果（现在有点bug）