简单实践 java spring boot 自动配置模拟
1.概要
1.1 需求，自己写一个redis-spring-boot-starter模拟自动配置
自动配置就是在引入*-starter坐标后，可以已经spring框架的规则实现一些Bean的自动注入，并设置一些参数的默认值，且也可以在引入的工程中修改这些配置的值。这里依据这个原理模拟一下。
1.2 要点
- @Configuration
@EnableConfigurationProperties(RedisProperties.class)
public class RedisAutoConfigration {
@Bean
public Jedis jedis(RedisProperties edisProperties){
return new Jedis(edisProperties.getHost(),edisProperties.getPort()); - @ConfigurationProperties
public class RedisProperties { redis.clients
jedis redis-spring-boot-autoconfigure
0.0.1-SNAPSHOT com.xjc.springcloundtest
redis-spring-boot-starter - Jedis jedis = context.getBean(Jedis.class);
System.out.println(jedis);
1.3 关键词
- @Configuration
- @EnableConfigurationProperties(RedisProperties.class)
- @Bean
- @ConfigurationProperties
- context.getBean(Jedis.class);
- @SpringBootApplication
- ConfigurableApplicationContext context = SpringApplication.run(Main.class);
2.代码
2.1 父工程
4.0.0
org.springframework.boot
spring-boot-starter-parent
3.2.2
com.xjc.springcloundtest
demo23
0.0.1-SNAPSHOT
pom
demo23
demo23
redis-spring-boot-starter
redis-spring-boot-autoconfigure
untitled
untitled1
17
org.springframework.boot
spring-boot-starter
org.springframework.boot
spring-boot-starter-test
test
org.springframework.boot
spring-boot-maven-plugin
2.2 启动工程 redis-spring-boot-starter
2.2.1 工程文件
4.0.0
com.xjc.springcloundtest
demo23
0.0.1-SNAPSHOT
redis-spring-boot-starter
21
21
UTF-8
com.xjc.springcloundtest
redis-spring-boot-autoconfigure
0.0.1-SNAPSHOT
2.3 自动配置工程 redis-spring-boot-autoconfigure
2.3.1 工程文件
4.0.0
com.xjc.springcloundtest
demo23
0.0.1-SNAPSHOT
redis-spring-boot-autoconfigure
21
21
UTF-8
redis.clients
jedis
2.3.2 配置类
package com.xjc.springcloundtest;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import redis.clients.jedis.Jedis;
@Configuration
@EnableConfigurationProperties(RedisProperties.class)
public class RedisAutoConfigration {
@Bean
public Jedis jedis(RedisProperties edisProperties){
return new Jedis(edisProperties.getHost(),edisProperties.getPort());
}
}
2.3.3 配置数据类
package com.xjc.springcloundtest;
import org.springframework.boot.context.properties.ConfigurationProperties;
@ConfigurationProperties
public class RedisProperties {
public int getPort() {
return port;
}
public void setPort(int port) {
this.port = port;
}
public String getHost() {
return host;
}
public void setHost(String host) {
this.host = host;
}
private String host="localhost";
private int port=6379;
}
2.4 使用自定义自动配置工程进行测试
2.4.1 工程文件
4.0.0
com.xjc.springcloundtest
demo23
0.0.1-SNAPSHOT
untitled
21
21
UTF-8
org.springframework.boot
spring-boot-starter-web
com.xjc.springcloundtest
redis-spring-boot-starter
0.0.1-SNAPSHOT
2.4.2 主函数
package com.xjc.springcloundtest;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import redis.clients.jedis.Jedis;
@SpringBootApplication
public class Main {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(Main.class);
System.out.println("Hello world!");
Jedis jedis = context.getBean(Jedis.class);
System.out.println(jedis);
}
}2.4.3 测试结果
C:\Users\ThinkPad\.jdks\openjdk-21.0.2\bin\java.exe -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 2023.3.2\lib\idea_rt.jar=61994:D:\Program Files\JetBrains\IntelliJ IDEA 2023.3.2\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\Users\ThinkPad\IdeaProjects\demo23\untitled\target\classes;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-web\3.2.2\spring-boot-starter-web-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-json\3.2.2\spring-boot-starter-json-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.15.3\jackson-databind-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.15.3\jackson-annotations-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.15.3\jackson-core-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.15.3\jackson-datatype-jdk8-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.15.3\jackson-datatype-jsr310-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.15.3\jackson-module-parameter-names-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\3.2.2\spring-boot-starter-tomcat-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\10.1.18\tomcat-embed-core-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\10.1.18\tomcat-embed-el-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\10.1.18\tomcat-embed-websocket-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-web\6.1.3\spring-web-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-beans\6.1.3\spring-beans-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\io\micrometer\micrometer-observation\1.12.2\micrometer-observation-1.12.2.jar;C:\Users\ThinkPad\.m2\repository\io\micrometer\micrometer-commons\1.12.2\micrometer-commons-1.12.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-webmvc\6.1.3\spring-webmvc-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-aop\6.1.3\spring-aop-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-context\6.1.3\spring-context-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-expression\6.1.3\spring-expression-6.1.3.jar;C:\Users\ThinkPad\IdeaProjects\demo23\redis-spring-boot-starter\target\classes;C:\Users\ThinkPad\IdeaProjects\demo23\redis-spring-boot-autoconfigure\target\classes;C:\Users\ThinkPad\.m2\repository\redis\clients\jedis\5.0.2\jedis-5.0.2.jar;C:\Users\ThinkPad\.m2\repository\org\apache\commons\commons-pool2\2.12.0\commons-pool2-2.12.0.jar;C:\Users\ThinkPad\.m2\repository\org\json\json\20231013\json-20231013.jar;C:\Users\ThinkPad\.m2\repository\com\google\code\gson\gson\2.10.1\gson-2.10.1.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter\3.2.2\spring-boot-starter-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot\3.2.2\spring-boot-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\3.2.2\spring-boot-autoconfigure-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-logging\3.2.2\spring-boot-starter-logging-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\ch\qos\logback\logback-classic\1.4.14\logback-classic-1.4.14.jar;C:\Users\ThinkPad\.m2\repository\ch\qos\logback\logback-core\1.4.14\logback-core-1.4.14.jar;C:\Users\ThinkPad\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.21.1\log4j-to-slf4j-2.21.1.jar;C:\Users\ThinkPad\.m2\repository\org\apache\logging\log4j\log4j-api\2.21.1\log4j-api-2.21.1.jar;C:\Users\ThinkPad\.m2\repository\org\slf4j\jul-to-slf4j\2.0.11\jul-to-slf4j-2.0.11.jar;C:\Users\ThinkPad\.m2\repository\jakarta\annotation\jakarta.annotation-api\2.1.1\jakarta.annotation-api-2.1.1.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-core\6.1.3\spring-core-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-jcl\6.1.3\spring-jcl-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\yaml\snakeyaml\2.2\snakeyaml-2.2.jar;C:\Users\ThinkPad\.m2\repository\org\slf4j\slf4j-api\2.0.11\slf4j-api-2.0.11.jar com.xjc.springcloundtest.Main
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v3.2.2)
2024-02-02T16:04:44.406+08:00 INFO 22288 --- [ main] com.xjc.springcloundtest.Main : Starting Main using Java 21.0.2 with PID 22288 (C:\Users\ThinkPad\IdeaProjects\demo23\untitled\target\classes started by ThinkPad in C:\Users\ThinkPad\IdeaProjects\demo23)
2024-02-02T16:04:44.410+08:00 INFO 22288 --- [ main] com.xjc.springcloundtest.Main : No active profile set, falling back to 1 default profile: "default"
2024-02-02T16:04:45.388+08:00 INFO 22288 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 8080 (http)
2024-02-02T16:04:45.400+08:00 INFO 22288 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2024-02-02T16:04:45.400+08:00 INFO 22288 --- [ main] o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.18]
2024-02-02T16:04:45.452+08:00 INFO 22288 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2024-02-02T16:04:45.453+08:00 INFO 22288 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 978 ms
2024-02-02T16:04:45.963+08:00 INFO 22288 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port 8080 (http) with context path ''
2024-02-02T16:04:45.970+08:00 INFO 22288 --- [ main] com.xjc.springcloundtest.Main : Started Main in 2.054 seconds (process running for 2.705)
Hello world!
Jedis{Connection{DefaultJedisSocketFactory{localhost:6379}}}
3 补充实验
3.1 概要
实验条件加载的效果，给对象加一个软件，如果用户已经创建了这个对象，就不再创建了。
3.2 代码
3.2 添加条件
3.2.1 配置文件变更 @ConditionalOnMissingBean(name = "jedis")
@Configuration
@EnableConfigurationProperties(RedisProperties.class)
public class RedisAutoConfigration {
@Bean
@ConditionalOnMissingBean(name = "jedis")
public Jedis jedis(RedisProperties edisProperties){
System.out.println("自动配置Jedis");
return new Jedis(edisProperties.getHost(),edisProperties.getPort());
}
}3.2.1 测试函数变更 添加Jedis 对象的Bean
@SpringBootApplication
public class Main {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(Main.class);
System.out.println("Hello world!");
//Jedis jedis = context.getBean(Jedis.class);
Object o = context.getBean("jedis");
System.out.println(o);
}
@Bean
public Jedis jedis2(){
return new Jedis("localhost",6379);
}
}3.3 测试结果
C:\Users\ThinkPad\.jdks\openjdk-21.0.2\bin\java.exe -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 2023.3.2\lib\idea_rt.jar=63505:D:\Program Files\JetBrains\IntelliJ IDEA 2023.3.2\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\Users\ThinkPad\IdeaProjects\demo23\untitled\target\classes;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-web\3.2.2\spring-boot-starter-web-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-json\3.2.2\spring-boot-starter-json-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.15.3\jackson-databind-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.15.3\jackson-annotations-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.15.3\jackson-core-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.15.3\jackson-datatype-jdk8-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.15.3\jackson-datatype-jsr310-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.15.3\jackson-module-parameter-names-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\3.2.2\spring-boot-starter-tomcat-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\10.1.18\tomcat-embed-core-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\10.1.18\tomcat-embed-el-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\10.1.18\tomcat-embed-websocket-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-web\6.1.3\spring-web-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-beans\6.1.3\spring-beans-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\io\micrometer\micrometer-observation\1.12.2\micrometer-observation-1.12.2.jar;C:\Users\ThinkPad\.m2\repository\io\micrometer\micrometer-commons\1.12.2\micrometer-commons-1.12.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-webmvc\6.1.3\spring-webmvc-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-aop\6.1.3\spring-aop-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-context\6.1.3\spring-context-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-expression\6.1.3\spring-expression-6.1.3.jar;C:\Users\ThinkPad\IdeaProjects\demo23\redis-spring-boot-starter\target\classes;C:\Users\ThinkPad\IdeaProjects\demo23\redis-spring-boot-autoconfigure\target\classes;C:\Users\ThinkPad\.m2\repository\redis\clients\jedis\5.0.2\jedis-5.0.2.jar;C:\Users\ThinkPad\.m2\repository\org\apache\commons\commons-pool2\2.12.0\commons-pool2-2.12.0.jar;C:\Users\ThinkPad\.m2\repository\org\json\json\20231013\json-20231013.jar;C:\Users\ThinkPad\.m2\repository\com\google\code\gson\gson\2.10.1\gson-2.10.1.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter\3.2.2\spring-boot-starter-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot\3.2.2\spring-boot-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\3.2.2\spring-boot-autoconfigure-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-logging\3.2.2\spring-boot-starter-logging-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\ch\qos\logback\logback-classic\1.4.14\logback-classic-1.4.14.jar;C:\Users\ThinkPad\.m2\repository\ch\qos\logback\logback-core\1.4.14\logback-core-1.4.14.jar;C:\Users\ThinkPad\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.21.1\log4j-to-slf4j-2.21.1.jar;C:\Users\ThinkPad\.m2\repository\org\apache\logging\log4j\log4j-api\2.21.1\log4j-api-2.21.1.jar;C:\Users\ThinkPad\.m2\repository\org\slf4j\jul-to-slf4j\2.0.11\jul-to-slf4j-2.0.11.jar;C:\Users\ThinkPad\.m2\repository\jakarta\annotation\jakarta.annotation-api\2.1.1\jakarta.annotation-api-2.1.1.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-core\6.1.3\spring-core-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-jcl\6.1.3\spring-jcl-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\yaml\snakeyaml\2.2\snakeyaml-2.2.jar;C:\Users\ThinkPad\.m2\repository\org\slf4j\slf4j-api\2.0.11\slf4j-api-2.0.11.jar com.xjc.springcloundtest.Main
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v3.2.2)
2024-02-02T16:59:08.925+08:00 INFO 42840 --- [ main] com.xjc.springcloundtest.Main : Starting Main using Java 21.0.2 with PID 42840 (C:\Users\ThinkPad\IdeaProjects\demo23\untitled\target\classes started by ThinkPad in C:\Users\ThinkPad\IdeaProjects\demo23)
2024-02-02T16:59:08.929+08:00 INFO 42840 --- [ main] com.xjc.springcloundtest.Main : No active profile set, falling back to 1 default profile: "default"
2024-02-02T16:59:09.780+08:00 INFO 42840 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 8080 (http)
2024-02-02T16:59:09.790+08:00 INFO 42840 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2024-02-02T16:59:09.790+08:00 INFO 42840 --- [ main] o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.18]
2024-02-02T16:59:09.833+08:00 INFO 42840 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2024-02-02T16:59:09.834+08:00 INFO 42840 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 843 ms
自动配置Jedis
2024-02-02T16:59:10.281+08:00 INFO 42840 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port 8080 (http) with context path ''
2024-02-02T16:59:10.287+08:00 INFO 42840 --- [ main] com.xjc.springcloundtest.Main : Started Main in 1.831 seconds (process running for 2.547)
Hello world!
Jedis{Connection{DefaultJedisSocketFactory{localhost:6379}}}
Process finished with exit code 130
3.4 让两处的名称相同
3.4.1 代码
//自动配置处
@Bean
@ConditionalOnMissingBean(name = "jedis")
public Jedis jedis(RedisProperties edisProperties){
System.out.println("自动配置Jedis");
return new Jedis(edisProperties.getHost(),edisProperties.getPort());
}
//主动配置出
@Bean
public Jedis jedis(){
return new Jedis("localhost",6379);
}3.4.2 测结果 还没有到加载bena的时候就报错了
C:\Users\ThinkPad\.jdks\openjdk-21.0.2\bin\java.exe -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 2023.3.2\lib\idea_rt.jar=65274:D:\Program Files\JetBrains\IntelliJ IDEA 2023.3.2\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\Users\ThinkPad\IdeaProjects\demo23\untitled\target\classes;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-web\3.2.2\spring-boot-starter-web-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-json\3.2.2\spring-boot-starter-json-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.15.3\jackson-databind-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.15.3\jackson-annotations-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.15.3\jackson-core-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.15.3\jackson-datatype-jdk8-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.15.3\jackson-datatype-jsr310-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.15.3\jackson-module-parameter-names-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\3.2.2\spring-boot-starter-tomcat-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\10.1.18\tomcat-embed-core-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\10.1.18\tomcat-embed-el-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\10.1.18\tomcat-embed-websocket-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-web\6.1.3\spring-web-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-beans\6.1.3\spring-beans-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\io\micrometer\micrometer-observation\1.12.2\micrometer-observation-1.12.2.jar;C:\Users\ThinkPad\.m2\repository\io\micrometer\micrometer-commons\1.12.2\micrometer-commons-1.12.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-webmvc\6.1.3\spring-webmvc-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-aop\6.1.3\spring-aop-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-context\6.1.3\spring-context-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-expression\6.1.3\spring-expression-6.1.3.jar;C:\Users\ThinkPad\IdeaProjects\demo23\redis-spring-boot-starter\target\classes;C:\Users\ThinkPad\IdeaProjects\demo23\redis-spring-boot-autoconfigure\target\classes;C:\Users\ThinkPad\.m2\repository\redis\clients\jedis\5.0.2\jedis-5.0.2.jar;C:\Users\ThinkPad\.m2\repository\org\apache\commons\commons-pool2\2.12.0\commons-pool2-2.12.0.jar;C:\Users\ThinkPad\.m2\repository\org\json\json\20231013\json-20231013.jar;C:\Users\ThinkPad\.m2\repository\com\google\code\gson\gson\2.10.1\gson-2.10.1.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter\3.2.2\spring-boot-starter-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot\3.2.2\spring-boot-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\3.2.2\spring-boot-autoconfigure-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-logging\3.2.2\spring-boot-starter-logging-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\ch\qos\logback\logback-classic\1.4.14\logback-classic-1.4.14.jar;C:\Users\ThinkPad\.m2\repository\ch\qos\logback\logback-core\1.4.14\logback-core-1.4.14.jar;C:\Users\ThinkPad\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.21.1\log4j-to-slf4j-2.21.1.jar;C:\Users\ThinkPad\.m2\repository\org\apache\logging\log4j\log4j-api\2.21.1\log4j-api-2.21.1.jar;C:\Users\ThinkPad\.m2\repository\org\slf4j\jul-to-slf4j\2.0.11\jul-to-slf4j-2.0.11.jar;C:\Users\ThinkPad\.m2\repository\jakarta\annotation\jakarta.annotation-api\2.1.1\jakarta.annotation-api-2.1.1.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-core\6.1.3\spring-core-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-jcl\6.1.3\spring-jcl-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\yaml\snakeyaml\2.2\snakeyaml-2.2.jar;C:\Users\ThinkPad\.m2\repository\org\slf4j\slf4j-api\2.0.11\slf4j-api-2.0.11.jar com.xjc.springcloundtest.Main
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v3.2.2)
2024-02-02T18:39:34.394+08:00 INFO 42764 --- [ main] com.xjc.springcloundtest.Main : Starting Main using Java 21.0.2 with PID 42764 (C:\Users\ThinkPad\IdeaProjects\demo23\untitled\target\classes started by ThinkPad in C:\Users\ThinkPad\IdeaProjects\demo23)
2024-02-02T18:39:34.396+08:00 INFO 42764 --- [ main] com.xjc.springcloundtest.Main : No active profile set, falling back to 1 default profile: "default"
2024-02-02T18:39:34.729+08:00 WARN 42764 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.support.BeanDefinitionOverrideException: Invalid bean definition with name 'jedis' defined in com.xjc.springcloundtest.Main: Cannot register bean definition [Root bean: class [null]; scope=; abstract=false; lazyInit=null; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=main; factoryMethodName=jedis; initMethodNames=null; destroyMethodNames=[(inferred)]; defined in com.xjc.springcloundtest.Main] for bean 'jedis' since there is already [Root bean: class [null]; scope=; abstract=false; lazyInit=null; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=redisAutoConfigration; factoryMethodName=jedis; initMethodNames=null; destroyMethodNames=[(inferred)]; defined in class path resource [com/xjc/springcloundtest/RedisAutoConfigration.class]] bound.
2024-02-02T18:39:34.735+08:00 INFO 42764 --- [ main] .s.b.a.l.ConditionEvaluationReportLogger :
Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2024-02-02T18:39:34.754+08:00 ERROR 42764 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
The bean 'jedis', defined in com.xjc.springcloundtest.Main, could not be registered. A bean with that name has already been defined in class path resource [com/xjc/springcloundtest/RedisAutoConfigration.class] and overriding is disabled.
Action:
Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true
Process finished with exit code 1
3.4.3 添加配置
spring:
main:
allow-bean-definition-overriding: trueC:\Users\ThinkPad\.jdks\openjdk-21.0.2\bin\java.exe -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 2023.3.2\lib\idea_rt.jar=65297:D:\Program Files\JetBrains\IntelliJ IDEA 2023.3.2\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\Users\ThinkPad\IdeaProjects\demo23\untitled\target\classes;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-web\3.2.2\spring-boot-starter-web-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-json\3.2.2\spring-boot-starter-json-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.15.3\jackson-databind-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.15.3\jackson-annotations-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.15.3\jackson-core-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.15.3\jackson-datatype-jdk8-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.15.3\jackson-datatype-jsr310-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.15.3\jackson-module-parameter-names-2.15.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\3.2.2\spring-boot-starter-tomcat-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\10.1.18\tomcat-embed-core-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\10.1.18\tomcat-embed-el-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\10.1.18\tomcat-embed-websocket-10.1.18.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-web\6.1.3\spring-web-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-beans\6.1.3\spring-beans-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\io\micrometer\micrometer-observation\1.12.2\micrometer-observation-1.12.2.jar;C:\Users\ThinkPad\.m2\repository\io\micrometer\micrometer-commons\1.12.2\micrometer-commons-1.12.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-webmvc\6.1.3\spring-webmvc-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-aop\6.1.3\spring-aop-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-context\6.1.3\spring-context-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-expression\6.1.3\spring-expression-6.1.3.jar;C:\Users\ThinkPad\IdeaProjects\demo23\redis-spring-boot-starter\target\classes;C:\Users\ThinkPad\IdeaProjects\demo23\redis-spring-boot-autoconfigure\target\classes;C:\Users\ThinkPad\.m2\repository\redis\clients\jedis\5.0.2\jedis-5.0.2.jar;C:\Users\ThinkPad\.m2\repository\org\apache\commons\commons-pool2\2.12.0\commons-pool2-2.12.0.jar;C:\Users\ThinkPad\.m2\repository\org\json\json\20231013\json-20231013.jar;C:\Users\ThinkPad\.m2\repository\com\google\code\gson\gson\2.10.1\gson-2.10.1.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter\3.2.2\spring-boot-starter-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot\3.2.2\spring-boot-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\3.2.2\spring-boot-autoconfigure-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\boot\spring-boot-starter-logging\3.2.2\spring-boot-starter-logging-3.2.2.jar;C:\Users\ThinkPad\.m2\repository\ch\qos\logback\logback-classic\1.4.14\logback-classic-1.4.14.jar;C:\Users\ThinkPad\.m2\repository\ch\qos\logback\logback-core\1.4.14\logback-core-1.4.14.jar;C:\Users\ThinkPad\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.21.1\log4j-to-slf4j-2.21.1.jar;C:\Users\ThinkPad\.m2\repository\org\apache\logging\log4j\log4j-api\2.21.1\log4j-api-2.21.1.jar;C:\Users\ThinkPad\.m2\repository\org\slf4j\jul-to-slf4j\2.0.11\jul-to-slf4j-2.0.11.jar;C:\Users\ThinkPad\.m2\repository\jakarta\annotation\jakarta.annotation-api\2.1.1\jakarta.annotation-api-2.1.1.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-core\6.1.3\spring-core-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\springframework\spring-jcl\6.1.3\spring-jcl-6.1.3.jar;C:\Users\ThinkPad\.m2\repository\org\yaml\snakeyaml\2.2\snakeyaml-2.2.jar;C:\Users\ThinkPad\.m2\repository\org\slf4j\slf4j-api\2.0.11\slf4j-api-2.0.11.jar com.xjc.springcloundtest.Main
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v3.2.2)
2024-02-02T18:41:04.833+08:00 INFO 40908 --- [ main] com.xjc.springcloundtest.Main : Starting Main using Java 21.0.2 with PID 40908 (C:\Users\ThinkPad\IdeaProjects\demo23\untitled\target\classes started by ThinkPad in C:\Users\ThinkPad\IdeaProjects\demo23)
2024-02-02T18:41:04.835+08:00 INFO 40908 --- [ main] com.xjc.springcloundtest.Main : No active profile set, falling back to 1 default profile: "default"
2024-02-02T18:41:05.636+08:00 INFO 40908 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port 8080 (http)
2024-02-02T18:41:05.648+08:00 INFO 40908 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2024-02-02T18:41:05.648+08:00 INFO 40908 --- [ main] o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.18]
2024-02-02T18:41:05.696+08:00 INFO 40908 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2024-02-02T18:41:05.696+08:00 INFO 40908 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 805 ms
2024-02-02T18:41:06.119+08:00 INFO 40908 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port 8080 (http) with context path ''
2024-02-02T18:41:06.124+08:00 INFO 40908 --- [ main] com.xjc.springcloundtest.Main : Started Main in 1.856 seconds (process running for 2.624)
Hello world!
Jedis{Connection{DefaultJedisSocketFactory{localhost:6379}}}
这时候才达到对比的效果
@Bean
@ConditionalOnMissingBean(name = "jedis")
public Jedis jedis(RedisProperties edisProperties){
System.out.println("自动配置Jedis");
return new Jedis(edisProperties.getHost(),edisProperties.getPort());
}