Question: Write a java controller that will save required data into the database. Controller will check Primary Key availability first. If entry_no is vacant then the

Write a java controller that will save required data into the

Write a java controller that will save required data into the database. Controller will check "Primary Key" availability first. If "entry_no" is vacant then the information will be saved otherwise an alert will be issued. Consider the given information in constructing the controller

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