求大神解决问题为什么我的数据插入进去显示成功了但是数据没进入数据库只是表面上成功了

package com.nutz.module;

import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.nutz.dao.Cnd;
import org.nutz.dao.Dao;
import org.nutz.dao.QueryResult;
import org.nutz.ioc.loader.annotation.Inject;
import org.nutz.ioc.loader.annotation.IocBean;
import org.nutz.lang.Strings;
import org.nutz.lang.util.NutMap;
import org.nutz.mvc.annotation.At;
import org.nutz.mvc.annotation.Attr;
import org.nutz.mvc.annotation.Fail;
import org.nutz.mvc.annotation.Filters;
import org.nutz.mvc.annotation.Ok;
import org.nutz.mvc.annotation.Param;

import com.nutz.bean.Student;



@IocBean
@At("/student") 
@Ok("json:full")
@Fail("http:500")
public class StudentModule {
	@Inject
	protected Dao dao;
	
	@At
	public int count(){
		return dao.count(Student.class);
	}
	
	@At
    @Ok(">>:/")
	public void logout(HttpSession session){
		session.invalidate();
	}
 	
 	
	
	@At
	@Filters
	public Object login(@Param("studentName")String name,@Param("password")String password,HttpSession session) {
		Student student=dao.fetch(Student.class, Cnd.where("studentName","=",name).and("password", "=",password));
		if(student==null){
			return false;
		}else{
			session.setAttribute("me", student.getId());
			return true;
		}    	
	}
	
	protected String checkStudent(Student student,boolean create){
 		if(student==null){
 			return "空对象";
 		}
 		if(create){
 			if(Strings.isBlank(student.getStudentName())||Strings.isBlank(student.getPassword()))
                 return "用户名/密码不能为空";
 		}else{
 			if(Strings.isBlank(student.getPassword()))
 				return "密码不能为空";
 		}
 		String password=student.getPassword().trim();
 		if(6>password.length()||password.length()>12){
 			return "密码长度6~12位";
 		}
 		student.setPassword(password);
 		
 		if(create){
 			int count=dao.count(Student.class, Cnd.where("name", "=", student.getStudentName()));
 		    if(count !=0){
 		    	return "学生已存在";
 		    }			
 		}else{
 			if(student.getId()<1){
 				return "学生Id非法";
 			}
 		}
     	
 		if(student.getStudentName() !=null)
 			student.setStudentName(student.getStudentName().trim());
     	return null;   	
     }
	
	@At
    public Object add(@Param("..")Student student){
 	   NutMap re=new NutMap();
 	   String msg=checkStudent(student,true);
 	   if(msg !=null){
 		   return re.setv("ok", false).setv("msg", msg);
 	   }
 	  
 	   student=dao.insert(student);
 	   return re.setv("ok", true).setv("data", student);
    }
	
	@At
	 public Object update(@Param("..")Student student){
	   NutMap re=new NutMap();	   
	   String msg=checkStudent(student,false);
	   if(msg !=null){
		   return re.setv("ok", false).setv("msg", msg);
	   }
	   student.setStudentName(null);
	   dao.updateIgnoreNull(student);
	   re.setv("ok", true);
	   return student;
	 }
	 
	@At
   public Object delete(@Param("id")int id, @Attr("me")int me) {
       if (me == id) {
           return new NutMap().setv("ok", false).setv("msg", "不能删除当前学生!!");
       }
       dao.delete(Student.class, id); 
       return new NutMap().setv("ok", true);
   }
	
	@At
   public List query(@Param("name")String name,HttpServletRequest request){
		Cnd cnd=Strings.isBlank(name)? null: Cnd.where("name","like","%"+name+"%");
		QueryResult qr=new QueryResult();
		qr.setList(dao.query(Student.class, cnd));	
		return qr.getList(); 	
   }
	
}





<%@ 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>界面</title>
<link rel="stylesheet" type="text/css" href="./easyui/themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="./easyui/themes/icon.css">
<link rel="stylesheet" type="text/css" href="./easyui/demo/demo.css">
 <script type="text/javascript" src="./easyui/jquery.min.js"></script>
<script type="text/javascript" src="./easyui/jquery.easyui.min.js"></script> 
<script type="text/javascript">
var base = '<%=request.getAttribute("base")%>';
$(function(){
	//ip与用户配置表
	$('#ds').datagrid({
 		url:base +"/student/query",
		pagination:false,//显示底部分页栏
		singleSelect:true,
		method: 'GET',
		columns:[[
			{field:'id',title:'Id',width:50,align:'center',editor:'text'},
			{field:'studentName',title:'用户名',width:100,align:'center',editor:'text'},
			{field:'password',title:'密码',width:100,align:'center',editor:'text'},
			{field:'address',title:'地址',width:200,align:'center',editor:'text'},
			{field:'_opt',title:'操作',width:100,align:'center',formatter:function(value,rec){
				var btn = '<input type="button" onclick="update()" value="保存"/>'; 
                return btn; 
			}}
		]],
		toolbar : [ {
		    text : '添加',
		    iconCls : 'icon-add',
		    handler : function(){
		    	$('#ds').datagrid("appendRow",{id:'',studentName:'',password:'',address:''});
		    }
		    
		   }, '-', {
		    text : '删除',
		    iconCls : 'icon-remove',
		    handler : function(){
		    	var _sR = $('#ds').datagrid("getSelected");
		    	var q = confirm("确认删除吗？");

		    	if(q){
		    		$('#ds').datagrid('acceptChanges');
		    		var _sr = $('#ds').datagrid("getSelected");
		    		var _delURL = base +"/student/delete";
		    		var _data = JSON.stringify(_sr);
		    		$.ajax({
		    		  type: 'POST',
		    		  url: _delURL,
		    		  data:_data,
		    		  dataType:"json",
		    		  contentType:"application/json",
		    		  success: function(msg){
		    			  alert("删除成功");
		    			  $('#ds').datagrid("reload");
		    		  }
		    		});
		    	}else{
		    		$('#ds').datagrid('acceptChanges');
		    	}
		    }
		   } ],
		onClickCell : function(index,field){
			$('#ds').datagrid('acceptChanges');
			$('#ds').datagrid('beginEdit', index);
		},
		onLoadSuccess:function(data){
			rows = $('#ds').datagrid("getRows").length;
		}
	});
});

function update(){
	$('#ds').datagrid('acceptChanges');
	var _selectedRow = $('#ds').datagrid("getSelected");
	var _updURL = base +"/student/update";
	var _addURL = base +"/student/add";
	var _data = JSON.stringify(_selectedRow);
	var newrows = $('#ds').datagrid("getRows").length;
	if(newrows== rows){
		$.ajax({
			  type:'POST',
			  url: _updURL,
			  data: _data,
			  dataType:"json",
			  contentType:"application/json",
			  success: function(msg){
				  $('#ds').datagrid("reload");
				  alert("修改成功");
				  
			  }
			});
	}else{
		$.ajax({
			  type: 'POST',
			  url: _addURL,
			  data: _data,
			  dataType:"json",
			  contentType:"application/json",
			  success: function(msg){
				  $('#ds').datagrid("reload");
				  alert("添加成功");
				
			  }
			 
			});
	}
};
</script>
</head>
<body>
	<table id="ds" title="" style="width:602px"></table>
</body>
</html>
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