在JavaScript脚本上调用Java

在JavaScript脚本上调用Java

package jsEngine;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class RunScript2 {
	 
    public static void main(String [] args){
            ScriptEngineManager manager = new ScriptEngineManager();
            ScriptEngine engine = manager.getEngineByName("rhino");

            String scriptString = "function add(op1,op2){return a+b} add(a,b);";

            engine.put("a", 1);
            engine.put("b", 2);
            //此处_sql是对象
            engine.put("_sql", new SQLRunner());
            //_sql调用update_sql()方法,"rec =" 可以去掉
            scriptString = "rec = _sql.update_sql()";
            
            try {
                    Object result = engine.eval(scriptString);
                    System.out.println(result);
            } catch (ScriptException e) {
                    e.printStackTrace();
            }
    }
}

package jsEngine;

public class SQLRunner {

	public void select_sql(){
		System.out.println("select success");
	}
	public int update_sql(){
		System.out.println("update success");
		return 1;
	}


}