任务告警组件分页参数无效问题修复；

optimize

optimize

Create maven.yml

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调度中心密码限制18位，修复修改密码超过18位无法登陆的问题；

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Fix typos and clean some code...

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https

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Merge pull request #1211 from qinnnyul/refactor-extract-common-method ...

extract method to avoid duplicated codes

Merge pull request #1212 from qinnnyul/replacing-main-with-junit-for-tesing ...

use junit test to replace main() for testing

use junit test to replace main() for testing

use junit test to replace main() for testing

extract method to avoid duplicated codes

cronGen 兼容性调整；可视化插件弹框会替换Input框，因此取值时应该从替换后的弹框中取；

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修复Cron可视化查看数据清空问题；