areadao注入失败

areadaotest可以成功运行，但是areadao显示注入失败，为什么？

控制台报文如下：

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com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit5 com.imooc.o2o.dao.AreaDaoTest,testQueryArea

Connected to the target VM, address: '127.0.0.1:49292', transport: 'socket'

2021-10-27 05:32:30.204 [main] INFO o.s.b.t.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [com.imooc.o2o.dao.AreaDaoTest], using SpringBootContextLoader

2021-10-27 05:32:30.220 [main] INFO o.s.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [com.imooc.o2o.dao.AreaDaoTest]: no resource found for suffixes {-context.xml, Context.groovy}.

2021-10-27 05:32:30.235 [main] INFO o.s.t.c.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [com.imooc.o2o.dao.AreaDaoTest]: AreaDaoTest does not declare any static, non-private, non-final, nested classes annotated with @Configuration.

2021-10-27 05:32:30.859 [main] INFO o.s.b.t.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration com.imooc.o2o.O2obootApplication for test class com.imooc.o2o.dao.AreaDaoTest

2021-10-27 05:32:31.296 [main] INFO o.s.b.t.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.boot.test.autoconfigure.webservices.client.MockWebServiceServerTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.event.ApplicationEventsTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener, org.springframework.test.context.event.EventPublishingTestExecutionListener]

2021-10-27 05:32:31.452 [main] INFO o.s.b.t.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.web.ServletTestExecutionListener@790174f2, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@42257bdd, org.springframework.test.context.event.ApplicationEventsTestExecutionListener@7689ddef, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@687a762c, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@1a2e2935, org.springframework.test.context.support.DirtiesContextTestExecutionListener@733c423e, org.springframework.test.context.transaction.TransactionalTestExecutionListener@4b629f13, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener@70925b45, org.springframework.test.context.event.EventPublishingTestExecutionListener@1b9ea3e3, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@aa22f1c, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@55e7a35c, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@37cd92d6, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@5922ae77, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@4263b080, org.springframework.boot.test.autoconfigure.webservices.client.MockWebServiceServerTestExecutionListener@2af616d3]

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:: Spring Boot :: (v2.5.6)

2021-10-27 05:32:32.700 [main] INFO com.imooc.o2o.dao.AreaDaoTest - Starting AreaDaoTest using Java 11.0.5 on 8PA12GBLYDQHVJ1 with PID 6188 (started by Administrator in E:\IDEAworkspace\o2oboot\o2oboot)

2021-10-27 05:32:32.731 [main] DEBUG com.imooc.o2o.dao.AreaDaoTest - Running with Spring Boot v2.5.6, Spring v5.3.12

2021-10-27 05:32:32.778 [main] INFO com.imooc.o2o.dao.AreaDaoTest - No active profile set, falling back to default profiles: default

2021-10-27 05:32:36.725 [main] INFO com.mchange.v2.log.MLog - MLog clients using java 1.4+ standard logging.

2021-10-27 05:32:37.286 [main] INFO com.mchange.v2.c3p0.C3P0Registry - Initializing c3p0-0.9.1.2 [built 21-May-2007 15:04:56; debug? true; trace: 10]

WARNING: An illegal reflective access operation has occurred

WARNING: Illegal reflective access by org.apache.ibatis.reflection.Reflector (file:/E:/maven-repo/org/mybatis/mybatis/3.4.5/mybatis-3.4.5.jar) to method java.lang.Object.finalize()

WARNING: Please consider reporting this to the maintainers of org.apache.ibatis.reflection.Reflector

WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations

WARNING: All illegal access operations will be denied in a future release

2021-10-27 05:32:42.045 [main] INFO com.imooc.o2o.dao.AreaDaoTest - Started AreaDaoTest in 10.4 seconds (JVM running for 17.251)

2021-10-27 05:32:43.714 [main] INFO c.m.v2.c3p0.impl.AbstractPoolBackedDataSource - Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 2, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 10000, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName -> 1hge152ak1gv1lwzm9jjj2|40a72ecd, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> com.mysql.cj.jdbc.Driver, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> 1hge152ak1gv1lwzm9jjj2|40a72ecd, idleConnectionTestPeriod -> 0, initialPoolSize -> 3, jdbcUrl -> jdbc:mysql://localhost:3306/o2o?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 0, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 30, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 10, numHelperThreads -> 3, numThreadsAwaitingCheckoutDefaultUser -> 0, preferredTestQuery -> null, properties -> {password=******, user=******}, propertyCycle -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false ]

2021-10-27 05:32:44.509 [main] DEBUG com.imooc.o2o.dao.AreaDao.queryArea - ==> Preparing: SELECT area_id, area_name, priority, create_time, last_edit_time FROM tb_area ORDER BY priority DESC

2021-10-27 05:32:44.603 [main] DEBUG com.imooc.o2o.dao.AreaDao.queryArea - ==> Parameters:

2021-10-27 05:32:44.915 [main] DEBUG com.imooc.o2o.dao.AreaDao.queryArea - <== Total: 5

Disconnected from the target VM, address: '127.0.0.1:49292', transport: 'socket'

Process finished with exit code 0

源码如下：

package com.imooc.o2o.dao;

import com.imooc.o2o.entity.Area;

import org.junit.jupiter.api.Test;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.test.context.SpringBootTest;

import java.util.List;

import static org.junit.jupiter.api.Assertions.assertEquals;