Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/entity/mime/content/ContentBody

根据引用\[1\]和引用\[2\]的内容，这个错误是由于找不到类org.apache.http.entity.mime.content.ContentBody引起的。解决方法是添加依赖，具体的依赖配置如下：

<dependency>
  <groupId>org.apache.httpcomponents</groupId>
  <artifactId>httpmime</artifactId>
  <version>4.3.2</version>
</dependency>

另外，根据引用\[3\]的内容，还可以检查以下几个方面来解决这个错误：
1. 检查环境变量，确保JAVA或JAVAC命令可以正常执行。
2. 检查使用的JDK版本和编译文件的JDK版本是否一致。
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