BeanShell Interpreter

BeanShell:
http://www.beanshell.org/

BeanShell Interpreter的使用：
http://www.beanshell.org/javadoc/bsh/Interpreter.html
http://ytuwlg.iteye.com/blog/326276

引用

import bsh.Interpreter;

public class ExpBeanShell {
    
    public static void main(String[] args) {
        
        System.out.println("start:");
        try {
            // Construct an BeanShell interpreter  
            Interpreter i = new Interpreter();
            i.set("x1", 5); // Set variables  
            i.set("x2", 5); // Set variables  
            i.set("x3", 5); // Set variables  
            i.set("x4", 5); // Set variables  
            i.set("x5", 5); // Set variables  

            // Eval a statement and get the result  
            i.eval("x6=x1+x2+(x3+x4)/x5*10");
            i.eval("x7=4.5555-x6");

            System.out.println("x1:" + i.get("x1"));
            System.out.println("x2:" + i.get("x2"));
            System.out.println("x3:" + i.get("x3"));
            System.out.println("x4:" + i.get("x4"));
            System.out.println("x5:" + i.get("x5"));
            System.out.println("x6:" + i.get("x6"));
            System.out.println("x7:" + i.get("x7"));

        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println("end:");
    }
}

输出：

引用

start:
x1:5
x2:5
x3:5
x4:5
x5:5
x6:30
x7:-25.444499999999998
end