Spring
1.1.1.1 创立一个bean
package com.zt.spring;public class MyBean { private String userName; private Integer userAge;}1.1.1.2 配置Config 配置bean
package com.zt.spring;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class MyBeanConfig { // 和xml中配置文件的bean的标签是一样的 @Bean(name = "beanName") public MyBean createBean(){ return new MyBean(); }}1.1.1.3 配置bean 单例还是多例的
package com.zt.spring;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.Scope;@Configurationpublic class MyBeanConfig { @Bean(name = "beanName") // 默认值是多例的 xml的形式能够在bean的标签下面 设置这个参数 @Scope("prototype") public MyBean createBean(){ return new MyBean(); }}1.1.1.4 获取上文，获取bean
package com.zt.spring;import org.springframework.context.annotation.AnnotationConfigApplicationContext;public class App { public static void main(String[] args) { // 获取上下文 AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MyBeanConfig.class); // 通过bean的那么获取bean System.out.println(context.getBean("beanName")); // 获取bean的class文件获取 System.out.println(context.getBean(MyBean.class)); context.close(); }}1.1.2 通过FactoryBean实现bena的拆卸
1.1.2.1 创立一个bean
package com.zt.spring;public class Car {}1.1.2.2 配置Config 配置bean
package com.zt.spring;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class MyBeanConfig { @Bean public CarFactoryBean createRunnableFactoryBean() { return new CarFactoryBean(); }}1.1.2.3 配置FactoryBean 生产bean
package com.zt.spring;import org.springframework.beans.factory.FactoryBean;public class CarFactoryBean implements FactoryBean<Car> { //获取到对应的实体 @Override public Car getObject() throws Exception { return new Car(); } // 返回的额对应的是class文件 @Override public Class<?> getObjectType() { return Car.class; } //配置是不是单例 @Override public boolean isSingleton() { return true; }}1.1.2.4 获取上文，获取bean
package com.zt.spring;import org.springframework.context.annotation.AnnotationConfigApplicationContext;public class App { public static void main(String[] args) { // 获取上下文 AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MyBeanConfig.class); // 通过FactoryBean 创立的bean System.out.println(context.getBean(Car.class)); // 通过name获取car的实体 System.out.println(context.getBean("createRunnableFactoryBean")); context.close(); }}1.1.3 通过另外一种工工厂模式实现bena的拆卸
1.1.3.1 创立一个bean
package com.zt.spring;public class Jeep {}1.1.3.2 配置Config 配置bean
package com.zt.spring;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class MyBeanConfig { @Bean public JeepFactory createJeepFactory() { return new JeepFactory(); } @Bean public Jeep createJeep(JeepFactory factory) { return factory.creat(); }}1.1.3.3 创立 Factory 实现构建办法
package com.zt.spring;public class JeepFactory { public Jeep creat() { return new Jeep(); }}1.1.3.4 获取上文，获取bean
package com.zt.spring;import org.springframework.context.annotation.AnnotationConfigApplicationContext;public class App { public static void main(String[] args) { // 获取上下文 AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MyBeanConfig.class); System.out.println(context.getBean("createJeep")); System.out.println(context.getBean(Jeep.class)); context.close(); }}1.2 spring中bean的销毁办法
1.2.1 调用spring本人的初始化和销毁的办法
1.2.1.1 创立一个bean
并且继承InitializingBean, DisposableBean ,实现afterPropertiesSet，destroy办法package com.zt.spring;import org.springframework.beans.factory.DisposableBean;import org.springframework.beans.factory.InitializingBean;public class User implements InitializingBean, DisposableBean { @Override public void afterPropertiesSet() throws Exception { System.out.println("=======afterPropertiesSet========"); } @Override public void destroy() throws Exception { System.out.println("=======destroy========"); }}1.2.1.2在conffig文件中拆卸这个bean
package com.zt.spring;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class MyBeanConfig { @Bean public User createUser() { return new User(); }}1.2.1.3 获取上下文
package com.zt.spring;import org.springframework.context.annotation.AnnotationConfigApplicationContext;public class App { public static void main(String[] args) { // 获取上下文 AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MyBeanConfig.class); System.out.println(context.getBean(User.class)); context.close(); }}1.2.2 调用自定义初始化和销毁的办法
1.2.2.1 创立一个bean
自定义init，destroy办法package com.zt.spring;public class Dog { // 初始化办法 public void init() throws Exception { System.out.println("=======init========"); } // 销毁的办法 public void destroy() throws Exception { System.out.println("=======destroy========"); }}1.2.2.2在conffig文件中拆卸这个bean
package com.zt.spring;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class MyBeanConfig { @Bean(initMethod = "init",destroyMethod = "destroy") public Dog createDog() { return new Dog(); }}1.2.2.3 获取上下文
package com.zt.spring;import org.springframework.context.annotation.AnnotationConfigApplicationContext;public class App { public static void main(String[] args) { // 获取上下文 AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MyBeanConfig.class); System.out.println(context.getBean(Dog.class)); context.close(); }}1.2.3 调用自定义并且注解初始化和销毁的办法
1.2.3.1 创立一个bean
自定义init，destroy办法 在加上注解放 @PostConstruct， @PreDestroy的形式实现package com.zt.spring;import javax.annotation.PostConstruct;import javax.annotation.PreDestroy;public class UserInfo { @PostConstruct public void afterPropertiesSet() throws Exception { System.out.println("=======afterPropertiesSet========"); } @PreDestroy public void destroy() throws Exception { System.out.println("=======destroy========"); }}1.2.3.2在conffig文件中拆卸这个bean
package com.zt.spring;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class MyBeanConfig { @Bean public UserInfo createUserInfo() { return new UserInfo(); }}1.2.2.3 获取上下文
package com.zt.spring;import org.springframework.context.annotation.AnnotationConfigApplicationContext;public class App { public static void main(String[] args) { // 获取上下文 AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MyBeanConfig.class); System.out.println(context.getBean(UserInfo.class)); context.close(); }}1.4 pom.文件
<?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..zt</groupId> <artifactId>spring</artifactId> <version>1.0-SNAPSHOT</version> <properties> <project.build.sourceEncodding>UTF-8</project.build.sourceEncodding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.3.20.RELEASE</version> </dependency> </dependencies></project>最初
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