啊哈！去过那里.

#set($intString = "9")
#set($Integer = 0)
$Integer.parseInt($intString)

这样做会使用 Java 底层速度.$Integer 变量只不过是一个 java Integer 对象，您可以使用它来访问 .parseInt

Doing this uses the java underlying velocity. The $Integer variable is nothing more that a java Integer object which you can then use to access .parseInt

以上代码用于演示.当然有优化的方法.

The above code is for demonstration. Of course there are ways to optimize it.