• spring入门(一) 根据xml实例化一个对象


    文档: https://docs.spring.io/spring/docs/5.0.9.RELEASE/spring-framework-reference/core.html#beans-factory-metadata

    包下载的位置  http://repo.spring.io/release/org/springframework/spring/5.0.9.RELEASE/

    1.pom如下:

     1 <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
     2         <dependency>
     3             <groupId>org.springframework</groupId>
     4             <artifactId>spring-core</artifactId>
     5             <version>5.0.9.RELEASE</version>
     6         </dependency>
     7         <dependency>
     8             <groupId>org.springframework</groupId>
     9             <artifactId>spring-context</artifactId>
    10             <version>5.0.9.RELEASE</version>
    11         </dependency>
    12         <!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
    13         <dependency>
    14             <groupId>org.springframework</groupId>
    15             <artifactId>spring-beans</artifactId>
    16             <version>5.0.9.RELEASE</version>
    17         </dependency>
    18         <!-- https://mvnrepository.com/artifact/org.springframework/spring-expression -->
    19         <dependency>
    20             <groupId>org.springframework</groupId>
    21             <artifactId>spring-expression</artifactId>
    22             <version>5.0.9.RELEASE</version>
    23         </dependency>
    View Code

    2.建立User类

     1 public class User {
     2     private String name;
     3     private Integer age;
     4 
     5     public String getName() {
     6         return name;
     7     }
     8 
     9     public void setName(String name) {
    10         this.name = name;
    11     }
    12 
    13     public Integer getAge() {
    14         return age;
    15     }
    16 
    17     public void setAge(Integer age) {
    18         this.age = age;
    19     }
    20 }
    View Code

    3.xml配置

     1 <?xml version="1.0" encoding="UTF-8"?>
     2 <beans xmlns="http://www.springframework.org/schema/beans"
     3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     4        xsi:schemaLocation="http://www.springframework.org/schema/beans
     5         http://www.springframework.org/schema/beans/spring-beans.xsd">
     6 
     7     <bean id="..." class="...">
     8         <!-- collaborators and configuration for this bean go here -->
     9     </bean>
    10 
    11     <bean id="..." class="...">
    12         <!-- collaborators and configuration for this bean go here -->
    13     </bean>
    14 
    15     <!-- more bean definitions go here -->
    16 
    17 </beans>

    4.实例化User类

    main方法里:

    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    1         //位置:setting/applicationContext.xml
    2         ApplicationContext context = new ClassPathXmlApplicationContext("setting/applicationContext.xml");
    3         User user = context.getBean("user",User.class);
    4         System.out.println(user);
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  • 原文地址:https://www.cnblogs.com/ICE_Inspire/p/9721382.html
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