mybatis-plus3.1.2使用代码生成器出现java.lang.NullPointerException: null

傷城~ 2022-12-19 04:58 126阅读 0赞

### 错误信息： ###

15:00:12.706 [main] DEBUG com.baomidou.mybatisplus.generator.AutoGenerator - ==========================准备生成文件...==========================
    15:00:14.788 [main] WARN org.apache.velocity.deprecation - configuration key 'file.resource.loader.unicode' has been deprecated in favor of 'resource.loader.file.unicode'
    15:00:14.794 [main] WARN org.apache.velocity.deprecation - configuration key 'file.resource.loader.path' has been deprecated in favor of 'resource.loader.file.path'
    15:00:14.795 [main] WARN org.apache.velocity.deprecation - configuration key 'file.resource.loader.class' has been deprecated in favor of 'resource.loader.file.class'
    15:00:14.795 [main] WARN org.apache.velocity.deprecation - configuration key 'input.encoding' has been deprecated in favor of 'resource.default_encoding'
    15:00:14.832 [main] ERROR com.baomidou.mybatisplus.generator.engine.AbstractTemplateEngine - 无法创建文件，请检查配置信息！
    java.lang.NullPointerException: null
    	……………………………………………………………………………………………………………………………………
    	com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
    15:00:14.846 [main] DEBUG com.baomidou.mybatisplus.generator.AutoGenerator - ==========================文件生成完成！！！==========================
    
    Process finished with exit code 0

### 问题解释： ###

这是该版本mybatis-plus的问题，具体可以看[官方回复][Link 1]，如下图：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDQ5OTYz_size_16_color_FFFFFF_t_70_pic_center]

所以并不是代码的问题，我之前在mp3.0.5版本就没有任何问题，然后使用3.1.2就出现了问题，这和问题中出现的错误是一样的

### 解决办法： ###

升级mybatis-plus相关依赖的版本到3.2.0，就可以成功解决问题，如下：

<dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.2.0</version>
    </dependency>
    
    
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-generator</artifactId>
            <version>3.2.0</version>
    </dependency>

[Link 1]: https://gitee.com/baomidou/mybatis-plus/issues/IZF5M
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDQ5OTYz_size_16_color_FFFFFF_t_70_pic_center]: /images/20221120/fe00e47dc04842808bc2aa9723df7c30.png