SpringBoot + Mybatis + MySQL，java.lang.IllegalStateException（无法加载ApplicationContext）

笛里谁知壮士心，沙头空照征人骨。这篇文章主要讲述SpringBoot + Mybatis + MySQL，java.lang.IllegalStateException：无法加载ApplicationContext相关的知识，希望能为你提供帮助。
我对Spring很新。我正在使用SpringBoot + Mybatis + mysql，当我为UserDAO进行单元测试时出现此异常：“java.lang.IllegalStateException：无法加载ApplicationContext”。我按照此链接设置我的测试环境：http://www.mybatis.org/spring-boot-starter/mybatis-spring-boot-test-autoconfigure/。我搜索了很多，但仍然无法找到解决方案。有人可以给我一些建议吗？非常感谢提前:)
这是我的Mybatis配置文件：

< ?xml version="1.0" encoding="UTF-8"?> < !DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">

< settings> < !-- Globally enables or disables any caches configured in any mapper under this configuration --> < setting name="cacheEnabled" value="https://www.songbingjia.com/android/true"/> < !-- Sets the number of seconds the driver will wait for a response from the database --> < setting name="defaultStatementTimeout" value="https://www.songbingjia.com/android/3000"/> < !-- Enables automatic mapping from classic database column names A_COLUMN to camel case classic Java property names aColumn --> < setting name="mapUnderscoreToCamelCase" value="https://www.songbingjia.com/android/true"/> < !-- Allows JDBC support for generated keys. A compatible driver is required. This setting forces generated keys to be used if set to true, as some drivers deny compatibility but still work --> < setting name="useGeneratedKeys" value="https://www.songbingjia.com/android/true"/> < /settings> < !-- Continue going here --> < /configuration>

这是我的pom.file：

< ?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.jingjie< /groupId> < artifactId> forum_demo< /artifactId> < version> 0.0.1-SNAPSHOT< /version> < packaging> jar< /packaging> < name> forum_demo< /name> < description> Demo project for Spring Boot< /description> < parent> < groupId> org.springframework.boot< /groupId> < artifactId> spring-boot-starter-parent< /artifactId> < version> 1.5.9.RELEASE< /version> < relativePath/> < !-- lookup parent from repository --> < /parent> < properties> < project.build.sourceEncoding> UTF-8< /project.build.sourceEncoding> < project.reporting.outputEncoding> UTF-8< /project.reporting.outputEncoding> < java.version> 1.8< /java.version> < /properties> < dependencies> < dependency> < groupId> org.springframework.boot< /groupId> < artifactId> spring-boot-starter-aop< /artifactId> < /dependency> < dependency> < groupId> org.springframework.boot< /groupId> < artifactId> spring-boot-starter-freemarker< /artifactId> < /dependency> < dependency> < groupId> org.springframework.boot< /groupId> < artifactId> spring-boot-starter-web< /artifactId> < /dependency> < dependency> < groupId> org.springframework.boot< /groupId> < artifactId> spring-boot-devtools< /artifactId> < scope> runtime< /scope> < /dependency> < dependency> < groupId> org.springframework.boot< /groupId> < artifactId> spring-boot-starter-test< /artifactId> < scope> test< /scope> < /dependency> < dependency> < groupId> mysql< /groupId> < artifactId> mysql-connector-java< /artifactId> < scope> runtime< /scope> < /dependency> < dependency> < groupId> org.mybatis< /groupId> < artifactId> mybatis< /artifactId> < version> 3.4.5< /version> < /dependency> < dependency> < groupId> org.mybatis.spring.boot< /groupId> < artifactId> mybatis-spring-boot-starter-test< /artifactId> < version> 1.3.1< /version> < /dependency> < dependency> < groupId> org.springframework< /groupId> < artifactId> spring-jdbc< /artifactId> < version> 5.0.2.RELEASE< /version> < /dependency> < !--< dependency> < groupId> org.springframework.boot< /groupId> < artifactId> spring-boot-configuration-processor< /artifactId> < optional> true< /optional> < /dependency> --> < /dependencies> < build> < plugins> < plugin> < groupId> org.springframework.boot< /groupId> < artifactId> spring-boot-maven-plugin< /artifactId> < /plugin> < /plugins> < /build>

这是我的UserDao

@Mapper public interface UserDao {static final String USER_TABLE = "user"; final String INSERT_FIELDS = " name, password, salt, head_url"; final String SELECT_FIELDS = " id, name, password, salt, head_url"; // insert a record into user table @Insert({"Insert into ", USER_TABLE, " (" + INSERT_FIELDS + ") values " + "(#{name}, #{password}, #{salt}, #{headUrl})"}) void addUser(User user); // select a record according to a given user id @Select({"select ", SELECT_FIELDS, " from ", USER_TABLE, " where id = # {id}"}) User getUserViaId(int id); // select a record according to a given user name @Select({"select ", SELECT_FIELDS , " from ", USER_TABLE, " where name = # {name}"}) User getUserViaName(String name); // update a user's password accroding to a given user id @Update({"update ", USER_TABLE, " set password = #{password} where id = # {id}"}) void updatePassword(int id); // delete a record accroding to a given user id @Delete({"delete from ", USER_TABLE, " where id = #{id]"}) void deleteRecordViaId(int id); }

这是我的applications.properties：

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/forum_demo? useUnicode=true& amp; characterEncoding=utf8& amp; useSSL=false spring.datasource.username=root spring.datasource.password=***** mybatis.config-location=classpath:src/main/resources/mybatis-config.xml

这是我的Test类：

package com.jingjie.forum_demo.daotest; import com.jingjie.forum_demo.dao.UserDao; import com.jingjie.forum_demo.model.User; import org.junit.Test; import org.junit.runner.RunWith; import org.mybatis.spring.boot.test.autoconfigure.MybatisTest; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringRunner; import java.util.Random; @RunWith(SpringRunner.class) //@SpringBootApplication @EnableAutoConfiguration @MybatisTest //@AutoConfigureTestDatabase(replace= AutoConfigureTestDatabase.Rplace.NONE) //@Sql("/forum_demo.sql") public class UserDaoTest {@Autowired UserDao userDaoTest; @Test public void addUserTest() {Random random = new Random(); for (int i = 0; i < 11; i ++) { // perform some test } } }

这是测试失败信息：

java.lang.IllegalStateException: Failed to load ApplicationContextat org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124) at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83) at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:117) at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) at org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener.prepareTestInstance(SpringBootDependencyInjectionTestExecutionListener.java:44) at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [com.jingjie.forum_demo.daotest.UserDaoTest]; nested exception is java.lang.IllegalStateException: Unable to read meta-data for class org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration at org.springframework.context.annotation.ConfigurationClassParser.processDeferredImportSelectors(ConfigurationClassParser.java:556) at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:185) at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:308) at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:228) at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:272) at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:92) at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:687) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:525) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:120) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) ... 25 more Caused by: java.lang.IllegalStateException: Unable to read meta-data for class org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration at org.springframework.boot.autoconfigure.AutoConfigurationSorter$AutoConfigurationClass.getAnnotationMetadata(AutoConfigurationSorter.java:217) at org.springframework.boot.autoconfigure.AutoConfigurationSorter$AutoConfigurationClass.getAnnotationValue(AutoConfigurationSorter.java:198) at org.springframework.boot.autoconfigure.AutoConfigurationSorter$AutoConfigurationClass.readBefore(AutoConfigurationSorter.java:186) at org.springframework.boot.autoconfigure.AutoConfigurationSorter$AutoConfigurationClass.< init> (AutoConfigurationSorter.java:158) at org.springframework.boot.autoconfigure.AutoConfigurationSorter$AutoConfigurationClasses.< init> (AutoConfigurationSorter.java:115) at org.springframework.boot.autoconfigure.AutoConfigurationSorter.getInPriorityOrder(AutoConfigurationSorter.java:57) at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.sort(AutoConfigurationImportSelector.java:241) at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.selectImports(AutoConfigurationImportSelector.java:98) at org.springframework.context.annotation.ConfigurationClassParser.processDeferredImportSelectors(ConfigurationClassParser.java:547) ... 38 more Caused by: java.io.FileNotFoundException: class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class] cannot be opened because it does not exist at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:172) at org.springframework.core.type.classreading.SimpleMetadataReader.< init> (SimpleMetadataReader.java:50) at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:98) at org.springframework.boot.type.classreading.ConcurrentReferenceCachingMetadataReaderFactory.createMetadataReader(ConcurrentReferenceCachingMetadataReaderFactory.java:89) at org.springframework.boot.type.classreading.ConcurrentReferenceCachingMetadataReaderFactory.getMetadataReader(ConcurrentReferenceCachingMetadataReaderFactory.java:76) at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:93) at org.springframework.boot.autoconfigure.AutoConfigurationSorter$AutoConfigurationClass.getAnnotationMetadata(AutoConfigurationSorter.java:213) ... 46 more Process finished with exit code 255

答案【SpringBoot + Mybatis + MySQL，java.lang.IllegalStateException（无法加载ApplicationContext）】我已经解决了这个问题，我在pom.file中使用了错误的Mybatis包。这就是为什么由于代码是正确的，但它显示了这样的错误