上篇文章代码是根据实体类生成数据库表，现在是根据表创建实体类
上一篇：https://blog.csdn.net/qq_42036869/article/details/84586825
1.报错：Unable to locate JAR/zip in file system as specified by the driver definition: mysql-connector-java-5.0.0-bin.jar.
到对话框里的JAR List选项，点击clear把所有的jar包删掉再重新把jar包导入就行了
2点测试test xonnection-》ping成功
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参照：https://blog.csdn.net/u012838836/article/details/54021600