Since I couldn't find any optimization software in Java I wrote my own implementation of the Simplex Method and submitted it to Apache Commons Math library: https://issues.apache.org/jira/browse/MATH-246
Recently JOptimizer, free and pure java, is available for linear programming and all other types of convex mathematical optimizations. It's simple to use and fully documented, the online site comes with a lot of examples.
Is your requirement to have any good, stable optimization library, or does it specifically need to apply the Simplex algorithm?
Drools Planner is pure Java (no JNI) and Apache licensed (fits your commercial needs), but instead of using Simplex, it uses metaheuristics (which scale well and deliver great results).
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由于我在 Java 中找不到任何优化软件，我编写了自己的 Simplex 方法实现，并将其提交给 Apache Commons Math 库： https://issues.apache.org/jira/browse/MATH-246
Since I couldn't find any optimization software in Java I wrote my own implementation of the Simplex Method and submitted it to Apache Commons Math library: https://issues.apache.org/jira/browse/MATH-246
http://ojalgo.org/ generated/org/ojalgo/optimization/线性/LinearSolver.html
http://ojalgo.org/generated/org/ojalgo/optimisation/linear/LinearSolver.html
最近，JOptimizer，免费且纯 java，可用于线性规划和所有其他类型的凸数学优化。 它使用简单且文档齐全，在线站点附带了大量示例。
Recently JOptimizer, free and pure java, is available for linear programming and all other types of convex mathematical optimizations. It's simple to use and fully documented, the online site comes with a lot of examples.
您是否需要有一个好的、稳定的优化库，或者是否特别需要应用Simplex算法？
Drools Planner 是纯 Java（无 JNI）和 Apache 许可（适合您的商业需求），但它不使用 Simplex，而是使用元启发法（可以很好地扩展并提供良好的结果）。
Is your requirement to have any good, stable optimization library, or does it specifically need to apply the Simplex algorithm?
Drools Planner is pure Java (no JNI) and Apache licensed (fits your commercial needs), but instead of using Simplex, it uses metaheuristics (which scale well and deliver great results).
SuanShu 有一套基本的和高级的优化算法：
Java优化
线性规划算法
SuanShu has a suite of optimization algorithms, basic as well as advanced:
Java optimization
linear programming algorithm