Java Spring

最新推荐文章于 2025-04-30 08:00:00 发布

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感觉自己似乎很久都没有学新技术了
的确， JavaWeb 的知识太多了，从前端到后端
从js到sql，spring springboot springMVC

其实学这个的初衷是我想要在远端写写自己想要的动态网站
看多了有点API师傅的意思，慢慢来吧
也巧刚申请了高校的aliyunECS
害，加油

Java Spring

spring web mvc（maven 帮我导其他包）
https://mvnrepository.com/artifact/org.springframework/spring-webmvc
spring doc
https://docs.spring.io/spring-framework/docs/5.2.0.RELEASE/spring-framework-reference/core.html#spring-core
sprring 下载地址
https://repo.spring.io/release/org/springframework/spring/

<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.3.6</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.3.6</version>
</dependency>

beans

<?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
        https://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="..." class="...">  
        <!-- collaborators and configuration for this bean go here -->
    </bean>

    <bean id="..." class="...">
        <!-- collaborators and configuration for this bean go here -->
    </bean>

    <!-- more bean definitions go here -->

</beans>

//jiva引入
//构造器
ApplicationContext context = new ClassPathXmlApplicationContext("services.xml", "daos.xml");

spring 创建对象的方式

Bean name 'Student' is already used in this <beans> element
Offending resource: class path resource [beans.xml]
 	//报错信息
    bean 重复
    赋值未完成

配置注解支持

<?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:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    <context:annotation-config/>

</beans>

报错+ eTest——中不小心写成了bean

Exception in thread "main" 
org.springframework.beans.factory.BeanDefinitionStoreException: 
	IOException parsing XML document from class path resource [beans.xml]; 
nested exception is java.io.FileNotFoundException: 
	class path resource [beans.xml] cannot be opened because it does not exist

报错++

4月 17, 2021 12:58:19 上午 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor lambda$buildAutowiringMetadata$2
信息: 
	Autowired annotation should only be used on methods with parameters: 
		public java.lang.String com.kuang.pojo.User.getName()