可能的异常

mybatis-plus java.lang.NoClassDefFoundError: freemarker/template/Configuration
mybatis-plus freemarker.template.Configuration

mybatis Failed to determine a suitable driver class

Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.

com.baomidou.mybatisplus.core.toolkit.StringUtils

需要的jar包

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

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.1</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.5.1</version>
        </dependency>

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

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

    @Test
    void fastGen(){
        FastAutoGenerator.create(URL, USERNAME, PASSWORD)
                .globalConfig(builder -> {
                    builder.author(AUTHOR) // 设置作者
//                            .enableSwagger() // 开启 swagger 模式
                            .fileOverride() // 覆盖已生成文件
                            .outputDir(OUTPUTDIR); // 指定输出目录
                })
                .packageConfig(builder -> {
                    builder.parent("org.") // 设置父包名
                            .moduleName("system") // 设置父包模块名
                            .pathInfo(Collections.singletonMap(OutputFile.mapperXml, OUTPUTDIR)); // 设置mapperXml生成路径
                })
                .strategyConfig(builder -> {
                    builder
//                            .addInclude("t_simple") // 设置需要生成的表名
                            .addInclude("user")
                            .addTablePrefix("t_", "c_"); // 设置过滤表前缀
                })
                .templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板
                .execute();
    }