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hierarchy - Make multiple dependent / cascading selection components in JSF

I am trying to make 4 dependent / cascading selection components. In this question, the selection component happens to ... . The other 2 menus get null values. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hierarchy - java convert hierarchical to flat data

Let's say we have a RDBMS Table like below. id name parentId 1 Computer 0 2 SmartDevice 0 3 CPU 1 ... ://stackoverflow.com/questions/65883620/java-convert-hierarchical-to-flat-data...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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