Java API中的条件字符串解析器？

从Java 1.6开始，如果您足够使用和/或不想引入其他库，则可以使用

scriptEngine

scriptEngine scriptEngine = new scriptEngineManager().getEngineByName("javascript");SimpleBindings bindings = new SimpleBindings();bindings.put("a", 0);bindings.put("b", 6);boolean firsteval =  (Boolean) scriptEngine.eval("a != 0 && b > 5", bindings);System.out.println(firsteval);bindings.put("a", 2);bindings.put("b", 6);boolean secondeval =  (Boolean) scriptEngine.eval("a != 0 && b > 5", bindings);System.out.println(secondeval);

输出量

falsetrue