mybatis-plus 代码生成器启动报类不存在

问题描述：

Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: com/baomidou/mybatisplus/generator/engine/AbstractTemplateEngine
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:650)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:632)
Caused by: java.lang.ClassNotFoundException: com.baomidou.mybatisplus.generator.engine.AbstractTemplateEngine
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
... 7 more

Process finished with exit code 1

答

把这个去掉

答

图片上传不了

答

导入相应依赖了吗：

 <!-- mybatis-plus -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.1</version>
        </dependency>

答

<?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">
    <parent>
        <artifactId>xxxxx-boot-parent</artifactId>
        <groupId>org.xxxxxx.boot</groupId>
        <version>2.4.2</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>xxxxx-microservice-form</artifactId>

    <dependencies>

        <!-- 引入微服务启动依赖 starter -->
        <dependency>
            <groupId>org.xxxxxx.boot</groupId>
            <artifactId>jeecg-boot-starter-cloud</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>com.alibaba.cloud</groupId>
                    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.xxxxx.boot</groupId>
            <artifactId>jeecg-boot-base-core</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-quartz</artifactId>
                </exclusion>

                <exclusion>
                    <groupId>org.xxxxxx.boot</groupId>
                    <artifactId>hibernate-re</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.microsoft.sqlserver</groupId>
                    <artifactId>sqljdbc4</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.oracle</groupId>
                    <artifactId>ojdbc6</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.postgresql</groupId>
                    <artifactId>postgresql</artifactId>
                </exclusion>

                <exclusion>
                    <groupId>com.aliyun</groupId>
                    <artifactId>aliyun-java-sdk-dysmsapi</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.aliyun.oss</groupId>
                    <artifactId>aliyun-sdk-oss</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.xkcoding.justauth</groupId>
                    <artifactId>justauth-spring-boot-starter</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>io.minio</groupId>
                    <artifactId>minio</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-data-redis</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.4.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.5</version>
        </dependency>

        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.30</version>
        </dependency>


        <dependency>
            <groupId>cn.smallbun.screw</groupId>
            <artifactId>screw-core</artifactId>
            <version>1.0.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>

        <!-- HikariCP -->
        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
            <version>3.4.5</version>
        </dependency>
        <dependency>
            <groupId>com.xuxueli</groupId>
            <artifactId>xxl-job-core</artifactId>
            <version>2.2.0</version>
        </dependency>

        <dependency>
            <groupId>com.netflix.feign</groupId>
            <artifactId>feign-httpclient</artifactId>
            <version>8.17.0</version>
        </dependency>


    </dependencies>

    <build>
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

        </plugins>
    </build>

</project>

部分隐去，我用xxxx代替了，如果要依赖树我再发

答

/**
 * 
 */


import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.rules.DateType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;

/**
 * @author 
 *
 */
public class CodeGenerator {
    
     private static String DataBaseName = "xxxx";
        private static String Url = "xxx";
        private static String DriverName = "com.mysql.cj.jdbc.Driver";
        private static String Username = "xxx";
        private static String Password = "xxx";
        private static String projectPath = System.getProperty("user.dir");
        
        public static void main(String[] args) {
            // 1、代码生成器
            AutoGenerator mpg = new AutoGenerator();

            // 2、全局配置
            GlobalConfig gc = new GlobalConfig()
                    .setAuthor("xxxx")
                    .setDateType(DateType.ONLY_DATE)            //定义生成的实体类中日期类型
                    .setFileOverride(false)                     //重新生成时文件是否覆盖
                    .setIdType(IdType.ID_WORKER)            //主键策略
                    .setOpen(false)
                    .setOutputDir(projectPath+"/src/main/java") //输出路径
                    .setServiceName("%sService")                //去掉Service接口的首字母I
                    .setSwagger2(true)                          //开启Swagger2模式
                    .setActiveRecord(false)
                    .setControllerName(null);
            mpg.setGlobalConfig(gc);

            // 3、数据源配置
            DataSourceConfig dsc = new DataSourceConfig()
//                    .setDbQuery()               // 数据库信息查询类
//                    .setSchemaName()
//                    .setTypeConvert()
                    .setDbType(DbType.MYSQL)
                    .setDriverName(DriverName)
                    .setPassword(Password)
                    .setUrl(Url)
                    .setUsername(Username);
            mpg.setDataSource(dsc);

            // 4、包配置
            PackageConfig pc = new PackageConfig()
                    .setParent("xxxxx")
                    .setController("controller")
                    .setEntity("bean")
                    .setMapper("mapper")
                    .setService("service")
                    .setModuleName("")
//                    .setPathInfo()              // 路径配置信息
                    .setServiceImpl("service.impl")
                    .setXml("mapper.xml");
            mpg.setPackageInfo(pc);

            // 5、策略配置
            StrategyConfig strategy = new StrategyConfig()
                    .setControllerMappingHyphenStyle(true)                  //url中驼峰转连字符
                    .setColumnNaming(NamingStrategy.underline_to_camel)     //数据库表映射到实体的命名策略
                    .setNaming(NamingStrategy.underline_to_camel)
                    .setEntityLombokModel(true)
                    .setRestControllerStyle(true)                           //restful api风格控制器
                    .setTablePrefix("tb_newbee_")                            //生成实体时去掉表前缀
//                    .setSuperControllerClass()                              //公共父类 , 你自己的父类控制器,没有就不用设置!
//                    .setSuperEntityClass()                                  //自定义继承的Entity类全称，带包名
//                    .setSuperEntityColumns()                                //写于父类中的公共字段
                    .setInclude(
                            "additive_update_record"
                    );
            mpg.setStrategy(strategy);

            // 6、添加模板引擎
            mpg.setTemplateEngine(new FreemarkerTemplateEngine());          // 添加 模板引擎

            // 7、执行
            mpg.execute();
        }

}

答

<dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.3</version>
        </dependency>
        <dependency>
            <groupId>com.ibeetl</groupId>
            <artifactId>beetl</artifactId>
            <version>2.8.1</version>
        </dependency>

        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
        </dependency>

答

右边的maven，先clean在install一下重新启动

答

处理好了没要不要远程给你处理?

mybatis-plus 代码生成器启动报类不存在

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