Guangdong Liu

[Improve]add spotless

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- Use the spotless plugin to standardize the code format

[Bugfix]Fix query time type exception

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close #38

Bug: [mysql] Query time type exception

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### Chat2DB Version main ### Describe the bug java.lang.UnsupportedOperationException: null at java.sql/java.sql.Date.toInstant(Date.java:316) at cn.hutool.core.date.DateUtil.format(DateUtil.java:570) at ai.chat2db.spi.util.JdbcUtils.getResultSetValue(JdbcUtils.java:182) at ai.chat2db.spi.sql.SQLExecutor.execute(SQLExecutor.java:148) at ai.chat2db.spi.sql.SQLExecutor.execute(SQLExecutor.java:174) at ai.chat2db.server.domain.core.impl.DlTemplateServiceImpl.execute(DlTemplateServiceImpl.java:141) at ai.chat2db.server.domain.core.impl.DlTemplateServiceImpl.execute(DlTemplateServiceImpl.java:86) at ai.chat2db.server.web.api.controller.rdb.RdbDmlController.manage(RdbDmlController.java:85) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at...

### Chat2DB Version main ### Describe the bug When I am creating the table the prompt looks like this.

## Purpose of this pull request ## Check list * [ ] Code changed are covered with tests, or it does not need tests for reason: * [ ] If...