JAVA把字符串当作表达式运行

直接可以穿一个字符串运行

private static void test(String pm1) {
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("js");
Object result;
try {
result = engine.eval(pm1);
System.out.println("a + b = " + result);
} catch (ScriptException e) {
e.printStackTrace();
}
}

改编于：http://blog.csdn.net/sdyy321/article/details/6959199