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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

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java - jsp characters can be automatically filled in to user, but not to author. Why?

2017-05-173 answers

From Java

spring-mvc - Java String The previous line can also output a value, but after entering the if, it becomes a null pointer.

2017-05-175 answers

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javascript - A comparison of node and java concurrency scenarios, please help explain

2017-05-171 answers

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java - How to map one-to-many in Mybatis

2017-05-173 answers

From Java

java - How to use HQL to filter out entities with collection attributes

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From iOS

iOS supports "open with other applications". Which type of Document Types can be set in plist to support doc/docx at the same time? <UTIs>

2017-05-171 answers

From Java

java - When building a WordPress website, does the backend have to use php?

2017-05-174 answers

From MongoDB

mongodb hot backup and cold backup

2017-05-171 answers

From Git

git clone problem

2017-05-171 answers