Spring的简单搭建

本文详细介绍如何在IntelliJ IDEA和Tomcat环境下,使用Maven构建工具搭建Spring框架项目。包括创建空项目、添加Spring依赖、编写HelloWorld示例、配置Spring Bean及运行项目等关键步骤。

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  • 工具idea,tomcat

  • File->New->Project,选择Empty Project,创建一个空工程

  • File->New->Module,选择Maven->org.apache.maven.archetype:maven-archetype-quickstart->Next

  • 填写坐标,框红的都为none

  • 填写maven的一些信息,框红的必须要填,不然这个工程创建会极慢极慢

  • 填写module name(以上步骤与Struts2的简单搭建中Maven方式搭建相似)

  • 修改pom.xml

      <modelVersion>4.0.0</modelVersion>
      <groupId>maven_spring</groupId>
      <artifactId>maven_spring</artifactId>
      <packaging>war</packaging>
      <version>1.0-SNAPSHOT</version>
      <name>maven_spring</name>
      <url>http://maven.apache.org</url>
    
      <properties>
          <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      </properties>
    
      <dependencies>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-aop</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-aspects</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-beans</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-context</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-context-support</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-core</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-expression</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-instrument</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-instrument-tomcat</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-jdbc</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-jms</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-messaging</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-orm</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-oxm</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-test</artifactId>
              <version>4.3.14.RELEASE</version>
              <!--<scope>test</scope>-->
          </dependency>
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-tx</artifactId>
              <version>4.3.14.RELEASE</version>
          </dependency>
          <dependency>
              <groupId>commons-logging</groupId>
              <artifactId>commons-logging</artifactId>
              <version>1.2</version>
          </dependency>
          <dependency>
              <groupId>aopalliance</groupId>
              <artifactId>aopalliance</artifactId>
              <version>1.0</version>
          </dependency>
      </dependencies>
    
  • 选中名为maven_spring的module目录,右键->Maven->Reimport,导入jar

  • 在src/main/java下编写HelloWorld,Main类

      public class HelloWorld {
          private String name;
      
          public void setName(String name) {
              this.name = name;
          }
      
          public void sayHello(){
              System.out.println("Hello "+name);
          }
      }
    
      public class Main {
          public static void main(String[] args){
              //创建一个spring的IOC容器对象
              ApplicationContext context = new ClassPathXmlApplicationContext("spring-config.xml");
              //从IOC容器中获取Bean实例
              HelloWorld helloWorld = (HelloWorld)context.getBean("helloWorld");
              //调用sayHello()方法
              helloWorld.sayHello();
          }
      }
    
  • 在src/main/resources下创建spring-config.xml文件,并设置bean

      <bean id="helloWorld" class="HelloWorld">
          <property name="name" value="lalala"></property>
      </bean>
    
  • 在Terminal中切换到相应路径,使用mvn compile编译

  • 右键运行Main类,就可以显示结果了


问题

  • 如果spring-config.xml文件放在了src/main/java下,则使用maven编译后,其不会出现在classes的文件夹下。有两种方法解决:
  1. 把配置文件放在src/main/resources的资源文件夹下

  2. 在pom.xml引入这个资源文件,如下:

     	<build>
             <resources>
                 <resource>
                     <directory>src/main/java</directory>
                     <includes>
                         <include>*.xml</include>
                     </includes>
                     <filtering>false</filtering>
                 </resource>
             </resources>
         </build>
    
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