我配的环境是springMVC+spring+jdbc 的 页面是这样的

我想要再点击查询工程类或技术类的时候页面上只显示这一类,该怎么实现? 下面是我的代码
//我想让他带着参数传回原界面 也就是main.jsp 该怎么实现 大哥大姐有知道的棒棒忙啊
还有在写
1.Dao里的
public List<GradeProject>queryProject(String projecttype){
String sql=" select * from grade_project where projecttype like '%"+projecttype+"%' ";
List<GradeProject>list=jdbcTemplate.query(sql, mapperProject);
return list;
}
2.controller 里的
@Controller
@RequestMapping("/common/queryproject")
public class QueryController {
private Logger log=Logger.getLogger(QueryController.class);
@Autowired
@Qualifier("userService")
private UserService userService;
@RequestMapping("/queryproject.do")
@ResponseBody
public String queryProject(HttpServletRequest request,String projecttype){
log.info("接收传过来的项目类型"+projecttype);
List<GradeProject>list=userService.queryProject(projecttype);
if(list!=null&&list.size()>0){
request.getSession().setAttribute("prolist", list);
}
//我想让他带着参数传回原界面 也就是main.jsp 该怎么实现 大哥大姐有知道的棒棒忙啊
return "init";
}
3.jsp里写的
$(" #query").click(function(){
var project=encodeURI($("#select").val());
if(project==0){
alert("请选择类型");
}else{
$.ajax({
type:"POST",
url : path + "/common/queryproject/queryproject.do",
data:"projecttype="+project,
dataType:"json",
success:function(){
// var url=path + "/common/queryproject / queryproject.do";
window.location=path + "/common/queryproject / queryproject.do?projecttype="+project;
}
});
}
});