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2017-05-181 answers

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javascript - A question about jquery selectors

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java - database query multiple tables

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From PHP

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From Java

java - When submitting a form, why does the action sometimes need to write the project name, and sometimes it only needs to write the servlet?

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From Java

java - When dealing with data relationships, what are the advantages and disadvantages of using database table foreign keys versus in-code maintenance?

2017-05-172 answers

From Java

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From Java

java - In order to avoid the complex one-to-many-to-many relationship in the database, I designed the database without foreign keys. Is this possible?

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From Java

java - Anonymous inner classes and inherited classes, why is there a difference when implementing ClassLoader

2017-05-171 answers

From Java

Questions about java deep copy

2017-05-174 answers