JAVA公式解析�C�Z��

zhaonp — Wed, 02 Apr 2014 09:07:00 GMT

// 数值型
Expression exp = new Expression("(x + y)/2");
Map variables = new HashMap();
variables.put("x", new BigDecimal("4.32"));
variables.put("y", new BigDecimal("342.1"));
BigDecimal result = exp.eval(variables);
System.out.println(result);
// 布尔�?br />Expression ww = new Expression("( A && B ) || C ");
Map vs = new HashMap();
vs.put("A", new BigDecimal("0"));
vs.put("B", new BigDecimal("1"));
vs.put("C", new BigDecimal("1"));
System.out.println(ww.eval(vs));
// 布尔�?
Expression dd = new Expression(" A > 200 ");
Map as = new HashMap();
as.put("A", new BigDecimal("12000"));
System.out.println(dd.eval(as));

需要eval.jar

zhaonp 2014-04-02 17:07 发表评论

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JAVA公式解析�C�Z��