IDEA+Maven创建Spring项目的实现步骤

Z时代
2024-01-10
分类：综合

这篇随笔搭建的工程是普通的Spring工程，用于学习Spring框架，如果要搭建SpringMVC工程，可以参考另一篇

第一步：在IDEA点击new -> project

左侧选择Maven,直接点击Next。第一次使用IDEA的朋友，顶部还要选择Project SDK路径，就是Java的安装路径。

这里随便填一下之后点击Next

选择项目存放路径，或者保持默认，点击Finish，来到工程页面之后，在项目文件夹上右键并选择Add Framework Support

在这个页面找一下Spring,打钩。点击OK

完成后，会下载Spring的jar包，并存放在项目的lib目录下。

下载完成之后创建一个简单的项目。

四个Java文件一个appContext.xml我贴在这里


public class Student {
  private String name;
  private Homework homework;
  public Student(){}
  public Student(String name, Homework homework) {
    this.name = name;
    this.homework = homework;
  }
  public void doHomeWork(){
    System.out.println(homework.getContent());
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public Homework getHomework() {
    return homework;
  }
  public void setHomework(Homework homework) {
    this.homework = homework;
  }
}


public class Homework {
  private String content;
  public Homework(){}
  public Homework(String content) {
    this.content = content;
  }
  public String getContent() {
    return content;
  }
  public void setContent(String content) {
    this.content = content;
  }
}


public class Homework {
  private String content;
  public Homework(){}
  public Homework(String content) {
    this.content = content;
  }
  public String getContent() {
    return content;
  }
  public void setContent(String content) {
    this.content = content;
  }
}


import java.util.Date;
public class CheckNowTime {
  public void beforDoHomework(){
    System.out.println(new Date(System.currentTimeMillis()));
  }
}


import org.springframework.context.support.ClassPathXmlApplicationContext;
public class App {
  public static void main(String[] args) {
    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("appContext.xml");
    Student student = context.getBean(Student.class);
    System.out.println(student.getName()+"准备做作业了");
    student.doHomeWork();
    context.close();
  }
}


<?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:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
  <!-- 让Spring管理 Student bean  -->
  <bean id="student" class="demo1.Student">
    <property name="name" value="小明"></property>
    <property name="homework" ref="homework"></property>
  </bean>
  <!-- 让Spring管理Homework bean-->
  <bean id="homework" class="demo1.Homework">
    <property name="content" value="how to calc 3+2 ?"></property>
  </bean>
  <!-- 切面定义-->
  <bean id="checktime" class="demo1.CheckNowTime"></bean>
  <aop:config>
    <aop:aspect ref="checktime">
      <aop:pointcut id="dohomework" expression="execution(* *.doHomeWork(..))"/>
      <aop:before pointcut-ref="dohomework" method="beforDoHomework"></aop:before>
    </aop:aspect>
  </aop:config>
</beans>

因为例子中使用Spring AOP,所以还需要引入一个jar包。我的pom.xml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.example</groupId>
  <artifactId>test</artifactId>
  <version>1.0-SNAPSHOT</version>
  <dependencies>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.9.4</version>
    </dependency>
  </dependencies>
</project>