MyBatis-Plus 集成3.3.1 报错

我先贴上一个能正常启动的 pom.xml 配置 (这个每次都能启动成功) , 配置文件用的application.properties

<?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>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.4.RELEASE</version>
        <relativePath/>
    </parent>

    <groupId>com.sesame</groupId>
    <artifactId>mp-demo</artifactId>
    <version>1.0</version>
    <packaging>jar</packaging>
    <name>${project.artifactId}-${project.version}</name>

    <dependencies>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>

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

        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.3.1</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

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

        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.13</version>
        </dependency>

    </dependencies>

    <build>
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

        </plugins>

    </build>

</project>

---

然后我新建了一个父项目

<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>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.4.RELEASE</version>
        <relativePath/>
    </parent>

    <groupId>com</groupId>
    <artifactId>sesame-parent</artifactId>
    <version>1.0</version>
    <packaging>pom</packaging>
    <name>${project.artifactId}-${project.version}</name>
    <description></description>


</project>

然后我把上面的pom.xml 修改了下

<!--    <parent>-->
<!--        <groupId>org.springframework.boot</groupId>-->
<!--        <artifactId>spring-boot-starter-parent</artifactId>-->
<!--        <version>2.2.4.RELEASE</version>-->
<!--        <relativePath/>-->
<!--    </parent>-->
    <parent>
        <groupId>com</groupId>
        <artifactId>sesame-parent</artifactId>
        <version>1.0</version>
        <relativePath/>
    </parent>

然后再启动的时候, 有时候能成功, 有时候会报错, 报错还有两种 - 第一种

Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class

• 第二种

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    com.baomidou.mybatisplus.core.MybatisMapperAnnotationBuilder.getLanguageDriver(MybatisMapperAnnotationBuilder.java:369)

The following method did not exist:

    com.baomidou.mybatisplus.core.MybatisConfiguration.getLanguageDriver(Ljava/lang/Class;)Lorg/apache/ibatis/scripting/LanguageDriver;

The method's class, com.baomidou.mybatisplus.core.MybatisConfiguration, is available from the following locations:

    jar:file:/Users/johnny/soft/maven/repository/com/baomidou/mybatis-plus-core/3.3.1/mybatis-plus-core-3.3.1.jar!/com/baomidou/mybatisplus/core/MybatisConfiguration.class

It was loaded from the following location:

    file:/Users/johnny/soft/maven/repository/com/baomidou/mybatis-plus-core/3.3.1/mybatis-plus-core-3.3.1.jar

我也没办法确定是什么问题, 不过直接继承 spring-boot-starter-parent:2.2.4.RELEAS 倒是能一直成功

Comment From: miemieYaho

自己检查jar版本移除冲突