Simply register function run times wrong Java. Lang. NullPointerException, how to solve ah, I cried-CodePudding

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Simply register function run times wrong Java. Lang. NullPointerException, how to solve ah, I cried

Time：01-28

Error message
Java. Lang. NullPointerException
At com. Dao. Impl. UserDAOImpl. Regist (UserDAOImpl. Java: 24)
At com. Service. Impl. UsersServiceImpl. Regist (UsersServiceImpl. Java: 14)
At com. Servlet. UsersRegistServlet. DoGet (43) UsersRegistServlet. Java:
At com. Servlet. UsersRegistServlet. DoPost (UsersRegistServlet. Java: 61)

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