let jsp embedded dynamic language python ruby groovy

ShellAction.java

package com.xx.xx.spider.action;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.List;
import javax.script.*;

import org.apache.commons.lang.StringUtils;
import org.apache.struts2.ServletActionContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

public class ShellAction extends BaseAction implements ApplicationContextAware {
    private static final Logger logger = LoggerFactory.getLogger(ShellAction.class);
    private String input="";
    private String output="";
    private String engineName="";
    private List<String> engineNames;
    private ApplicationContext ac;
    @Override
    public String execute() throws Exception {
        // TODO Auto-generated method stub
        logger.debug("engineName {}",this.getEngineName());
//        this.setEngineName(this.getEngineName());
        ScriptEngine currentEngine=null;
        if(StringUtils.isNotBlank(this.getEngineName()))
        {
           
            currentEngine=new ScriptEngineManager().getEngineByName(this.getEngineName());
            Bindings bindings=currentEngine.createBindings();
            bindings.put("__ac", this.ac);
            bindings.put("__request", ServletActionContext.getRequest());
            bindings.put("__response", ServletActionContext.getResponse());
            bindings.put("__sc", ServletActionContext.getServletContext());
            bindings.put("__context", ServletActionContext.getContext());


            StringWriter sw = new StringWriter();
//            PrintWriter pw = new PrintWriter(sw);
//            currentEngine.getContext().setWriter(pw);
            currentEngine.getContext().setWriter(sw);
            boolean success=true;
            try{
            currentEngine.eval(this.getInput(),bindings);
            }
            catch(Exception ex)
            {
                success=false;
                this.setOutput(sw.getBuffer().toString()+"\n"+ex.toString());
            }
            if (success)
            {
                this.setOutput(sw.getBuffer().toString());
            }
        }

        return SUCCESS;
    }
    public String getInput() {
        return input;
    }
    public void setInput(String input) {
        this.input = input;
    }
    public String getOutput() {
        return output;
    }
    public void setOutput(String output) {
        this.output = output;
    }
    public List<String> getEngineNames() {
        return engineNames;
    }
    public void setEngineNames(List<String> engineNames) {
        this.engineNames = engineNames;
    }
    public String getEngineName() {
        return engineName;
    }
    public void setEngineName(String engineName) {
        this.engineName = engineName;
    }
    @Override
    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException {
        // TODO Auto-generated method stub
        this.ac=applicationContext;
       
    }
   

}

applicaitonContext-action.xml

    <bean id="shellAction" class="com.xx.xx.spider.action.ShellAction">
        <property name="engineNames">
            <list>
                <value>python</value>
                <value>ruby</value>
                <value>groovy</value>
            </list>       
        </property>
    </bean>   

structs.xml

        <action name="shell" class="shellAction">
            <result type="dispatcher" name="success">
                <param name="location">/WEB-INF/jsp/shell.jsp</param>
            </result>
        </action>

shell.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<%--
  Created by IntelliJ IDEA.
  User: mlzboy
  Date: 12-2-19
  Time: 下午1:24
  To change this template use File | Settings | File Templates.
--%>
<html>
<head>
    <title>shell</title>
    <script src="${pageContext.request.contextPath}/js/jquery-1.4.2.min.js"></script>
</head>
<body>
<form action="${pageContext.request.contextPath}/shell.do" name="form1" method="post">
<p>
<select id="engineName" name="engineName">
    <c:forEach var="item" items="${engineNames}" varStatus="status">
    <option value="${item}">${item}</option>
    </c:forEach>
</select>
<input type="submit" name="sub" value="提交" />
</p>
<textarea id="input" name="input" rows="10" cols="80">${input}</textarea>

</form>

<textarea name="output" rows="10" cols="80">${output}</textarea>

</body>
</html>
<script>
$("#input").focus();

$('#engineName option[value="${engineName}"]').attr("selected", "selected");
</script>