1.在我的项目里面使用到了Jap，后面又使用到了Mybatis。
我这里出现了一个很奇怪的问题，
就是在写mybatis的单元测试的时候

java.lang.IllegalStateException: Failed to load ApplicationContext

    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125)
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108)
    at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190)
    at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    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$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$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.BeanCreationException: Error creating bean with name 'serverEndpointExporter' defined in class path resource [com/imooc/config/WebSocketConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: javax.websocket.server.ServerContainer not available
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1708)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:581)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327)
    at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:139)
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99)
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117)
    ... 24 more
Caused by: java.lang.IllegalStateException: javax.websocket.server.ServerContainer not available
    at org.springframework.util.Assert.state(Assert.java:73)
    at org.springframework.web.socket.server.standard.ServerEndpointExporter.afterPropertiesSet(ServerEndpointExporter.java:106)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1767)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1704)
    ... 39 more

错误的原因我在网上找了很多，反正最终都没有解决我的问题。
**最后我发现我只要把 我项目中websocketconfig的 @Bean给注释掉，这个问题就解决了。
但愿测试也可以测试了。我很费解。我像应该是起冲突了吧！但是我还是不知道该如何兼容这个问题**。

下面是我项目的相关配置信息：
pom文件

<?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.imooc</groupId>
    <artifactId>sell</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>sell</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.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-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- 日志依赖 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <!--添加数据库相关组件-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <!--添加数据库相关组件-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
        </dependency>

        <!-- 用于 在打包时 自动生成 set get toString 方法等 的注解的使用 见：ProductCategory类 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <!-- json转换 -->
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>

        <!-- 微信公众账号 开源库 -->
        <dependency>
            <groupId>com.github.binarywang</groupId>
            <artifactId>weixin-java-mp</artifactId>
            <version>2.7.0</version>
        </dependency>
        
        <!-- 引入 freemarker-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>

        <!-- Redis 依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

        <!-- websocket 依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-websocket</artifactId>
        </dependency>

        <!-- mybatis 依赖 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.0</version>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

配置文件
yml

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    username: root
    password: 123456
    url: jdbc:mysql://172.16.3.224:3306/sell?useUnicode=true&characterEncoding=utf-8&useSSL=false&allowPublicKeyRetrieval=true


  #公寓mysql 192.168.0.5 公司mysql 172.16.3.166 具体的值以 虚拟机服务器中的为准 通过 ifconfig 查看 eth1中的 inet
  jpa:
    show-sql: true
    database-platform: org.hibernate.dialect.MySQLDialect
  jackson:
    default-property-inclusion: non_null #当后台返回的结果中 有属性为null时，就不返回该简直对给前端

  #配置redis信息 由于 redis的配置在 虚拟机上的 所以下面的 ip地址 和 上面的 mysql ip地址 一致
  redis:
    host: 172.16.3.224
    pool: 6379
    password:

#server:
#  content-path: /sell
server:
  servlet:
    context-path: /sell # 与教程不同 可能是版本问题 老的方式失效 如下

#设置日志 为了看到 mybatis的sql语句 一般就是开发的时候这么干
logging:
  level:
   com.imooc.dateobject.mapper: trace

#mybatis 配置xml文件所在位置
mybatis:
  mapper-locations: classpath:mapper/*.xml

mybatisd的mapper文件

package com.imooc.dateobject.mapper;

import com.imooc.dateobject.ProductCategory;
import org.apache.ibatis.annotations.*;

import java.util.List;
import java.util.Map;

/**
 * 使用mybatis 对 类目 进行 增删改查
 * @author kenshin
 * @date 2018/8/6 上午9:06
 */
public interface ProductCategoryMapper {

    //方式一
    @Insert("insert into product_category(category_name, category_type) values (#{category_name, jdbcType=VARCHAR}, #{category_type, jdbcType=INTEGER})")
    int insertByMap(Map<String, Object>map);
    //这里返回值的 int 代表 插入的条数，

    //方式二
    @Insert("insert into product_category(category_name, category_type) values (#{categoryName, jdbcType=VARCHAR}, #{categoryType, jdbcType=INTEGER})")
    int insertByObject(ProductCategory productCategory);

    //查询
    @Select("select * from product_category where category_type = #{categoryType}")
    @Results({
            @Result(column = "category_id", property = "categoryId"),
            @Result(column = "category_name", property = "categoryName"),
            @Result(column = "category_type", property = "categoryType"),
            @Result(column = "create_time", property = "createTime"),
            @Result(column = "update_time", property = "updateTime")
    })
    ProductCategory findByCategoryType(Integer categoryType);

    //查询
    @Select("select * from product_category where category_name = #{categoryName}")
    @Results({
            @Result(column = "category_id", property = "categoryId"),
            @Result(column = "category_name", property = "categoryName"),
            @Result(column = "category_type", property = "categoryType"),
            @Result(column = "create_time", property = "createTime"),
            @Result(column = "update_time", property = "updateTime")
    })
    List<ProductCategory> findByCategoryNme(String categoryName);

    //更新[根据字段]
    @Update("update product_category set category_name = #{categoryName} where category_type = #{categoryType}")
    int updateByCatgeoryType(@Param("categoryName") String categoryName,
                             @Param("categoryType") Integer categoryType);

    //更新【根据对象】
    @Update("update product_category set category_name = #{categoryName} where category_type = #{categoryType}")
    int updateByObject(ProductCategory productCategory);

    //删除
    @Delete("delete from product_category where category_type = #{categoryType}")
    int deleteByCategoryType(Integer categoryType);

    //查询 通过使用xml文件来实现查询
    ProductCategory selectByCategoryType(Integer categoryType);
}

WebSocket的配置文件

package com.imooc.config;

import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;

/**
 * @author kenshin
 * @date 2018/8/3 下午3:05
 */
@Component
public class WebSocketConfig {

//    当需要使用 mybatis 时 这里不注释掉 mybatis的单元测试就会报错 应该是发生冲突了 暂未解决此问题
    @Bean
    public ServerEndpointExporter serverEndpointExporter(){
        return new ServerEndpointExporter();
    }

}