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Tags: Backend and APIs
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Apache KIE (Knowledge Is Everything) is the home of Drools, OptaPlanner, jBPM, and Kogito.

  • rule-engine
  • java
  • dmn
  • hacktoberfest

Read and write Excel (.xlsx, .xls), CSV, and ODS files in Java with one line of code. Annotation-based mapping, SAX streaming, built-in validation, 19 type converters, cell styling. A high-performance alternative to Apache POI.

  • annotation
  • apache-poi
  • csv
  • data-processing

Lightweight Java library for reading and writing fixed-width / fixed-length flat files using annotations on POJOs — for banking, payroll, EDI, mainframe, and batch integrations.

  • annotations
  • banking
  • batch-processing
  • edi

Compile-time annotation processor for Spring Boot. Generates predictable REST APIs, DTOs, JSON Patch endpoints, and N+1 safe JPA repositories without runtime reflection.