help!大神快来，我又遇到有关问题了。ssh+easyui中的ajax从jsp向后台传值_Java Web开发

help!大神快来，小弟我又遇到问题了。ssh+easyui中的ajax从jsp向后台传值
先上码

package com.ly.action;

import java.util.HashMap;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import net.sf.json.JSONObject;
import com.ly.model.Teacher;
import com.ly.service.TeacherService;
import com.opensymphony.xwork2.ActionSupport;

public class JsonAction extends ActionSupport {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private String ttName;
	private String ttSex;
	private String ttWork;
	private int ttId;
	private JSONObject easyJson;
	private TeacherService teacherService;
	private HttpServletRequest request;

	public String bbb() {
		
		System.out.println( "Name"+getTtName());
		String str = request.getParameter(ttName);
		List<Teacher> teachers = teacherService.finds(str);
		System.out.println("finds" + teachers);
		HashMap<String, Object> map = new HashMap<String, Object>();
		map.put("total", teachers.size());
		map.put("rows", teachers);
		easyJson = JSONObject.fromObject(map);
		return SUCCESS;
	}

	public String getTtName() {
		return ttName;
	}

	public void setTtName(String ttName) {
		this.ttName = ttName;
	}

	public String getTtSex() {
		return ttSex;
	}

	public void setTtSex(String ttSex) {
		this.ttSex = ttSex;
	}

	public String getTtWork() {
		return ttWork;
	}

	public void setTtWork(String ttWork) {
		this.ttWork = ttWork;
	}

	public int getTtId() {
		return ttId;
	}

	public void setTtId(int ttId) {
		this.ttId = ttId;
	}

	public JSONObject getEasyJson() {
		return easyJson;
	}

	public void setEasyJson(JSONObject easyJson) {
		this.easyJson = easyJson;
	}


	public TeacherService getTeacherService() {
		return teacherService;
	}

	public void setTeacherService(TeacherService teacherService) {
		this.teacherService = teacherService;
	}

}

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>查找-删除老师信息</title>
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/jquery.easyui.min.js"></script>
<script type="text/javascript" src="js/easyui-lang-zh_CN.js" charset="utf-8"></script>
<link rel="stylesheet" type="text/css" href="css/easyui.css">
<link rel="stylesheet" type="text/css" href="css/common.css">

 </head>
<body>
	<%@taglib prefix="s" uri="/struts-tags" %>
	<form action="/project/selectAction.action" method="post">
	
	
		<table width="300px" border="0"  cellpadding="0" cellspacing="0" align="center">
			<tr><td height="200px">&nbsp;</td></tr>
			
		</table>
		<!-- 查找/删除页面 -->
		<table width="300px" border="2" rules="none" cellpadding="0" cellspacing="0" align="center">
			
			
			<tr><td  height="50px" align="left"><h2>查找/删除教师</h2></td></tr>
			<tr>
				<td align="center" height="40px">姓&nbsp;&nbsp;名:&nbsp;<input type="text" onclick=aa(value=this.value) id="ttName" name="ttName"/></td>
				
			</tr>
			<tr>
				<td align="center" height="40px">性&nbsp;&nbsp;别:&nbsp;<input type="text" name="ttSex"/></td>
				
			</tr>
			<tr>
				<td align="center" height="40px">课&nbsp;&nbsp;程:&nbsp;<input type="text" name="ttWork"/></td>
				
			</tr>
			<tr>
				<td align="center" height="40px">I&nbsp;&nbsp;D:&nbsp;<input type="text" name="ttId"/></td>
				
			</tr>
			<tr>
				<td align="center" height="12px"><s:fielderror></s:fielderror></td>
			</tr>
			
			<tr>
				<td  align="center" height="40px"><input type="submit" style="width:70px;height:25px" value="查找"/></td>
				
			</tr>
			

		</table>
		
	</form>	

	
</body>
</html>