一)spring-boot-starter命名規(guī)則
自動(dòng)配置模塊命名規(guī)則:xxx-spring-boot,如:aspectlog-spring-boot
啟動(dòng)器命名規(guī)則:xxx-spring-boot-starter,如:aspectlog-spring-boot-starter
如兩者只有一個(gè)模塊:建議以xxx-spring-boot-starter方式命名。
springboot建議以xxx前綴的方式對自己的自動(dòng)配置命名的。
二)spring-boot-starter條件注解
注解 | 說明 |
@ConditionalOnClass | 指定加載的類 |
@ConditionalOnMissingClass | 指定不加載的類 |
@ConditionalOnBean | 指定需要加載的bean |
@ConditionalOnMissingBean | 指定不需要加載的bean |
@ConditionalOnProperty | 指定加載配置文件中的屬性,如yml或properties文件 |
@ConditionalOnResource | 檢查特定的資源是否存在,如:file:/home/user/test.dat |
@ConditionalOnExpression | 使用SpEL表達(dá)式 |
該文章使用@ConditionalOnProperty注解實(shí)現(xiàn)。
三)創(chuàng)建自己的aspectlog-spring-boot-starter日志打印自動(dòng)配置模塊
第一步:創(chuàng)建一個(gè)aspectlog-spring-boot-starter名稱的maven項(xiàng)目
在pom.xml文件中引入springboot相應(yīng)jar
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< 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.oysept</ groupId > < artifactId >aspectlog-spring-boot-starter</ artifactId > < version >0.0.1-SNAPSHOT</ version > <!-- springboot版本信息 --> < parent > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-parent</ artifactId > < version >2.1.4.RELEASE</ version > </ parent > < properties > < java.version >1.8</ java.version > </ properties > < dependencies > < dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-autoconfigure</ artifactId > </ dependency > < dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-aop</ artifactId > </ dependency > <!-- 自定義配置 --> < dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-configuration-processor</ artifactId > < optional >true</ optional > </ dependency > </ dependencies > </ project > |
spring-boot-configuration-processor作用:會(huì)在源數(shù)據(jù)文件(META-INF/spring-autoconfigure-metadata.properties)中自動(dòng)掃描加載和自動(dòng)配置有關(guān)的條件。也就是說,當(dāng)編寫starter時(shí),會(huì)讀取自動(dòng)配置的條件,寫入源數(shù)據(jù)文件中。
第二步:定義一個(gè)AspectLog注解類
該注解作用于方法上,并在運(yùn)行時(shí)啟用
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package com.oysept.autoconfiguration.aspectlog; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; @Target (ElementType.METHOD) @Retention (RetentionPolicy.RUNTIME) public @interface AspectLog { } |
第三步:創(chuàng)建一個(gè)AspectLogProperties類,用于加載yml或properties中的屬性
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package com.oysept.autoconfiguration.aspectlog; import org.springframework.boot.context.properties.ConfigurationProperties; @ConfigurationProperties ( "aspectlog" ) public class AspectLogProperties { private boolean enable; public boolean isEnable() { return enable; } public void setEnable( boolean enable) { this .enable = enable; } } |
第四步:創(chuàng)建一個(gè)AspectLogAutoConfiguration打印日志自動(dòng)配置類
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package com.oysept.autoconfiguration.aspectlog; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.EnableAspectJAutoProxy; import org.springframework.core.PriorityOrdered; @Aspect @EnableAspectJAutoProxy (exposeProxy = true , proxyTargetClass = true ) @Configuration @ConditionalOnProperty (prefix= "aspectlog" , name = "enable" , havingValue = "true" , matchIfMissing = true ) public class AspectLogAutoConfiguration implements PriorityOrdered { protected Logger logger = LoggerFactory.getLogger(getClass()); @Around ( "@annotation(com.oysept.autoconfiguration.aspectlog.AspectLog) " ) public Object isOpen(ProceedingJoinPoint thisJoinPoint) throws Throwable { //執(zhí)行方法名稱 String taskName = thisJoinPoint.getSignature() .toString().substring( thisJoinPoint.getSignature() .toString().indexOf( " " ), thisJoinPoint.getSignature().toString().indexOf( "(" )); taskName = taskName.trim(); long time = System.currentTimeMillis(); Object result = thisJoinPoint.proceed(); logger.info( "==>aspectlog method:{} run :{} ms" , taskName, (System.currentTimeMillis() - time)); return result; } @Override public int getOrder() { //保證事務(wù)等切面先執(zhí)行 return Integer.MAX_VALUE; } } |
注解說明:
@ConditionalOnProperty(prefix = "aspectLog", name = "enable",havingValue = "true", matchIfMissing = true)
當(dāng)yml或properties配置文件中有aspectLog.enable=true時(shí)開啟,如果配置文件沒有設(shè)置aspectLog.enable也開啟。
第五步:創(chuàng)建spring.factories文件,該文件是springboot規(guī)定的配置文件,把自動(dòng)配置類按規(guī)則配置
先在src/main/resources下創(chuàng)建一個(gè)META-INF文件夾,然后在文件夾下創(chuàng)建spring.factories
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.oysept.autoconfiguration.aspectlog.AspectLogAutoConfiguration
META-INF/spring.factories是spring的工廠機(jī)制,在這個(gè)文件中定義的類,都會(huì)被自動(dòng)加載。多個(gè)配置使用逗號分割,換行用\
第六步:使用mvn install方式把該模塊自動(dòng)打包
四)測試aspectlog-spring-boot-starter打印日志配置
另外創(chuàng)建一個(gè)springboot_starter_test名稱的maven項(xiàng)目
在pom中引入aspectlog-spring-boot-starter的jar
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< 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.oysept</ groupId > < artifactId >springboot_starter_test</ artifactId > < version >0.0.1-SNAPSHOT</ version > < packaging >jar</ packaging > < parent > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-parent</ artifactId > < version >2.1.4.RELEASE</ version > < relativePath /> </ parent > < properties > < java.version >1.8</ java.version > </ properties > < dependencies > < dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-web</ artifactId > </ dependency > <!-- 引入自定義aspectlog-spring-boot-starter 打印日志jar --> < dependency > < groupId >com.oysept</ groupId > < artifactId >aspectlog-spring-boot-starter</ artifactId > < version >0.0.1-SNAPSHOT</ version > </ dependency > </ dependencies > <!-- maven打包插件,在cmd命令窗口執(zhí)行,如: mvn install -U --> < build > < plugins > < plugin > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-maven-plugin</ artifactId > </ plugin > </ plugins > </ build > </ project > |
創(chuàng)建一個(gè)application.yml,配置啟動(dòng)的端口,默認(rèn)是8080
server:
port: 8080
創(chuàng)建application啟動(dòng)類
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package com.oysept; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class TestSpringBootStarterApplication { public static void main(String[] args) { SpringApplication.run(TestSpringBootStarterApplication. class , args); } } |
創(chuàng)建測試AspectLog功能controller
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package com.oysept.controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import com.oysept.autoconfiguration.aspectlog.AspectLog; @RestController public class GetController { /** * 訪問地址: http://localhost:8080/test/starter/aspectlog?param=TTTEEESSSTTT * @return */ @AspectLog @RequestMapping (value= "/test/starter/aspectlog" , method = RequestMethod.GET) public String testStarterAspectLog( @RequestParam (value = "param" ) String param) { System.out.println( "==>/test/starter/aspectlog, param: " + param); // 處理業(yè)務(wù)邏輯 return "/test/starter/aspectlog SUCCESS!" ; } } |
在想要打印日志的方法上,使用@AspectLog注解
啟動(dòng)TestSpringBootStarterApplication中的main方法
在瀏覽器中輸入:http://localhost:8080/test/starter/aspectlog?param=TTTEEESSSTTT
然后在控制臺(tái)查看效果:
以上這篇SpringBoot2.1.x,創(chuàng)建自己的spring-boot-starter自動(dòng)配置模塊操作就是小編分享給大家的全部內(nèi)容了,希望能給大家一個(gè)參考,也希望大家多多支持服務(wù)器之家。
原文鏈接:https://blog.csdn.net/p812438109/article/details/108558345