learning
/
SpringAll
mirror of https://github.com/wuyouzhuguli/SpringAll.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

深入学习Spring组件注册

This commit is contained in:
mrbird 2019-03-13 18:31:38 +08:00
parent c6feec9ba6
commit 934ccbf08f
23 changed files with 418 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
50.Spring-Regist-Bean/pom.xml Normal file
View File

@ -0,0 +1,43 @@
<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>cc.mrbird</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

61
50.Spring-Regist-Bean/src/main/java/cc/mrbird/DemoApplication.java Normal file
View File

@ -0,0 +1,61 @@
package cc.mrbird;
import cc.mrbird.demo.config.WebConfig;
import cc.mrbird.demo.service.CalculateService;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.WebApplicationType;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import java.util.Arrays;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
ConfigurableApplicationContext context1 = new SpringApplicationBuilder(DemoApplication.class)
.web(WebApplicationType.NONE)
.profiles("java7")
.run(args);
// 返回 IOC 容器，使用注解配置，传入配置类
ApplicationContext context = new AnnotationConfigApplicationContext(WebConfig.class);
System.out.println("容器创建完毕");
// User user = context.getBean(User.class);
// System.out.println(user);
// 查看 User 这个类在 Spring 容器中叫啥玩意
// String[] beanNames = context.getBeanNamesForType(User.class);
// Arrays.stream(beanNames).forEach(System.out::println);
// 查看基于注解的 IOC容器中所有组件名称
String[] beanNames = context.getBeanDefinitionNames();
Arrays.stream(beanNames).forEach(System.out::println);
// 组件的作用域
// Object user1 = context.getBean("user");
// Object user2 = context.getBean("user");
// System.out.println(user1 == user2);
// 测试懒加载
// Object user1 = context.getBean("user");
// Object user2 = context.getBean("user");
// 测试 Profile
CalculateService service = context1.getBean(CalculateService.class);
System.out.println("求合结果： " + service.sum(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
// FactoryBean测试
Object cherry = context.getBean("cherryFactoryBean");
System.out.println(cherry.getClass());
Object cherryFactoryBean = context.getBean("&cherryFactoryBean");
System.out.println(cherryFactoryBean.getClass());
}
}

16
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/condition/MyCondition.java Normal file
View File

@ -0,0 +1,16 @@
package cc.mrbird.demo.condition;
import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.core.type.AnnotatedTypeMetadata;
/**
* @author MrBird
*/
public class MyCondition implements Condition {
@Override
public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
String osName = context.getEnvironment().getProperty("os.name");
return osName != null && osName.contains("Windows");
}
}

48
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/config/WebConfig.java Normal file
View File

@ -0,0 +1,48 @@
package cc.mrbird.demo.config;
import cc.mrbird.demo.condition.MyCondition;
import cc.mrbird.demo.domain.Hello;
import cc.mrbird.demo.domain.User;
import cc.mrbird.demo.factory.CherryFactoryBean;
import cc.mrbird.demo.filter.MyTypeFilter;
import cc.mrbird.demo.register.MyImportBeanDefinitionRegistrar;
import cc.mrbird.demo.selector.MyImportSelector;
import lombok.Builder;
import org.springframework.context.annotation.*;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
/**
* @author MrBird
*/
@Configuration
// @ComponentScan(value = "cc.mrbird.demo"
// , excludeFilters = {
// @Filter(type = FilterType.ANNOTATION,
// classes = {Controller.class, Repository.class}),
// @Filter(type = FilterType.ASSIGNABLE_TYPE, classes = User.class)
// @Filter(type = FilterType.CUSTOM, classes = MyTypeFilter.class)
// }
// includeFilters = {
// @Filter(type = FilterType.ANNOTATION, classes = Service.class)
// }, useDefaultFilters = false
// )
@Import({Hello.class, MyImportSelector.class, MyImportBeanDefinitionRegistrar.class})
public class WebConfig {
@Bean
// @Conditional(MyCondition.class)
// @Lazy
// @Scope("prototype")
public User user() {
System.out.println("往IOC容器中注册user bean");
return new User("mrbird", 18);
}
@Bean
public CherryFactoryBean cherryFactoryBean() {
return new CherryFactoryBean();
}
}

10
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/controller/UserController.java Normal file
View File

@ -0,0 +1,10 @@
package cc.mrbird.demo.controller;
import org.springframework.stereotype.Controller;
/**
* @author MrBird
*/
@Controller
public class UserController {
}

10
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/dao/UserMapper.java Normal file
View File

@ -0,0 +1,10 @@
package cc.mrbird.demo.dao;
import org.springframework.stereotype.Repository;
/**
* @author MrBird
*/
@Repository
public class UserMapper {
}

7
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/domain/Apple.java Normal file
View File

@ -0,0 +1,7 @@
package cc.mrbird.demo.domain;
/**
* @author MrBird
*/
public class Apple {
}

7
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/domain/Banana.java Normal file
View File

@ -0,0 +1,7 @@
package cc.mrbird.demo.domain;
/**
* @author MrBird
*/
public class Banana {
}

7
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/domain/Cherry.java Normal file
View File

@ -0,0 +1,7 @@
package cc.mrbird.demo.domain;
/**
* @author MrBird
*/
public class Cherry {
}

7
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/domain/Hello.java Normal file
View File

@ -0,0 +1,7 @@
package cc.mrbird.demo.domain;
/**
* @author MrBird
*/
public class Hello {
}

7
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/domain/Strawberry.java Normal file
View File

@ -0,0 +1,7 @@
package cc.mrbird.demo.domain;
/**
* @author MrBird
*/
public class Strawberry {
}

17
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/domain/User.java Normal file
View File

@ -0,0 +1,17 @@
package cc.mrbird.demo.domain;
import lombok.*;
import org.springframework.stereotype.Component;
/**
* @author MrBird
*/
@ToString
@AllArgsConstructor
@NoArgsConstructor
@Data
// @Component
public class User {
private String name;
private Integer age;
}

14
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/domain/UserDetail.java Normal file
View File

@ -0,0 +1,14 @@
package cc.mrbird.demo.domain;
import org.springframework.stereotype.Component;
/**
* @author MrBird
*/
// @Component
public class UserDetail extends User {
private int sex;
}

7
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/domain/Watermelon.java Normal file
View File

@ -0,0 +1,7 @@
package cc.mrbird.demo.domain;
/**
* @author MrBird
*/
public class Watermelon {
}

24
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/factory/CherryFactoryBean.java Normal file
View File

@ -0,0 +1,24 @@
package cc.mrbird.demo.factory;
import cc.mrbird.demo.domain.Cherry;
import org.springframework.beans.factory.FactoryBean;
/**
* @author MrBird
*/
public class CherryFactoryBean implements FactoryBean<Cherry> {
@Override
public Cherry getObject() {
return new Cherry();
}
@Override
public Class<?> getObjectType() {
return Cherry.class;
}
@Override
public boolean isSingleton() {
return false;
}
}

29
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/filter/MyTypeFilter.java Normal file
View File

@ -0,0 +1,29 @@
package cc.mrbird.demo.filter;
import org.springframework.core.io.Resource;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.core.type.ClassMetadata;
import org.springframework.core.type.classreading.MetadataReader;
import org.springframework.core.type.classreading.MetadataReaderFactory;
import org.springframework.core.type.filter.TypeFilter;
import org.springframework.util.StringUtils;
import java.io.IOException;
/**
* @author MrBird
*/
public class MyTypeFilter implements TypeFilter {
@Override
public boolean match(MetadataReader metadataReader, MetadataReaderFactory metadataReaderFactory) {
// 获取当前正在扫描的类的注解信息
AnnotationMetadata annotationMetadata = metadataReader.getAnnotationMetadata();
// 获取当前正在扫描的类的类信息
ClassMetadata classMetadata = metadataReader.getClassMetadata();
// 获取当前正在扫描的类的路径等信息
Resource resource = metadataReader.getResource();
String className = classMetadata.getClassName();
return StringUtils.hasText("er");
}
}

22
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/register/MyImportBeanDefinitionRegistrar.java Normal file
View File

@ -0,0 +1,22 @@
package cc.mrbird.demo.register;
import cc.mrbird.demo.domain.Strawberry;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
import org.springframework.core.type.AnnotationMetadata;
/**
* @author MrBird
*/
public class MyImportBeanDefinitionRegistrar implements ImportBeanDefinitionRegistrar {
@Override
public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
final String beanName = "strawberry";
boolean contain = registry.containsBeanDefinition(beanName);
if (!contain) {
RootBeanDefinition rootBeanDefinition = new RootBeanDefinition(Strawberry.class);
registry.registerBeanDefinition(beanName, rootBeanDefinition);
}
}
}

19
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/selector/MyImportSelector.java Normal file
View File

@ -0,0 +1,19 @@
package cc.mrbird.demo.selector;
import org.springframework.context.annotation.ImportSelector;
import org.springframework.core.type.AnnotationMetadata;
/**
* @author MrBird
*/
public class MyImportSelector implements ImportSelector {
@Override
public String[] selectImports(AnnotationMetadata importingClassMetadata) {
return new String[]{
"cc.mrbird.demo.domain.Apple",
"cc.mrbird.demo.domain.Banana",
"cc.mrbird.demo.domain.Watermelon"
};
}
}

9
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/service/CalculateService.java Normal file
View File

@ -0,0 +1,9 @@
package cc.mrbird.demo.service;
/**
* @author MrBird
*/
public interface CalculateService {
Integer sum(Integer... value);
}

10
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/service/UserService.java Normal file
View File

@ -0,0 +1,10 @@
package cc.mrbird.demo.service;
import org.springframework.stereotype.Service;
/**
* @author MrBird
*/
@Service
public class UserService {
}

23
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/service/impl/Java7CalculateServiceImpl.java Normal file
View File

@ -0,0 +1,23 @@
package cc.mrbird.demo.service.impl;
import cc.mrbird.demo.service.CalculateService;
import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Service;
/**
* @author MrBird
*/
@Service
@Profile("java7")
public class Java7CalculateServiceImpl implements CalculateService {
@Override
public Integer sum(Integer... value) {
System.out.println("Java 7环境下执行");
int result = 0;
for (int i = 0; i <= value.length; i++) {
result += i;
}
return result;
}
}

21
50.Spring-Regist-Bean/src/main/java/cc/mrbird/demo/service/impl/Java8CalculateServiceImpl.java Normal file
View File

@ -0,0 +1,21 @@
package cc.mrbird.demo.service.impl;
import cc.mrbird.demo.service.CalculateService;
import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Service;
import java.util.Arrays;
/**
* @author MrBird
*/
@Service
@Profile("java8")
public class Java8CalculateServiceImpl implements CalculateService {
@Override
public Integer sum(Integer... value) {
System.out.println("Java 8环境下执行");
return Arrays.stream(value).reduce(0, Integer::sum);
}
}

0
50.Spring-Regist-Bean/src/main/resources/application.properties Normal file
View File