Solve mapper duplication problem in reverse engineering

When we generate the corresponding by reverse engineering Mapper The project cannot be started when files and entity classes are encountered

• Reverse engineering xml Add... Under the user name and password in the file <property name="nullCatalogMeansCurrent" value="true" />
• Add... Below this position <!-- Database connection information ： Drive class 、 Connection address 、 user name 、 password --> <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/shop?useUnicode=true&amp;useSSL=false&amp;characterEncoding=UTF-8&amp;serverTimezone=UTC" userId="root" password="123456">
• Delete reverse engineered mapper File and entity classes rerun the program