寻宗师：SSH中，页面传值给action中，查询结果报错_J2EE

寻大师：SSH中，页面传值给action中，查询结果报错：

页面代码：
<script type="text/javascript">
     function selectSid()
     {
        var sid = document.getElementById("sid").value;
        window.location.href="findBySidStudent?sid="+sid;
     }
  </script>
<body>
      请输入学生学号：<input id="sid" type="text" name="t_44kwssb.sid"><br/>

    <input type="button" value="提交" onclick="selectSid()"/>
    <input type="reset" value="重置" />


  </body>

action方法：   属性sid，已经加了get set方法
         public String doFindBySid() throws Exception{
     Model model=modelService.findSid(sid);//学号
     ActionContext ac =ActionContext.getContext();
     request=(Map<String,Object>)ac.get("request");
        request.put("model", model);
        return Constant.SUCCGET;
    }

service方法：
       public Model findSid(int sid) {
    String hql ="from Model as c where = c.sid = '"+sid+"' ";

     return  modeldao.findSid(hql);
        }

页面错误代码:
HTTP Status 500 - unexpected token: = near line 1, column 33 [from Model.as c where = c.sid = '5' ]; nested exception is org.hibernate.hql.ast.QuerySyntaxException: unexpected token: = near line 1, column 33 [from Model.as c where = c.sid = '5' ]
type Exception report

message unexpected token: = near line 1, column 33 [from Model as c where = c.sid = '5' ]; nested exception is org.hibernate.hql.ast.QuerySyntaxException: unexpected token: = near line 1, column 33 [from model as c where = c.sid = '5' ]

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.springframework.orm.hibernate3.HibernateQueryException: unexpected token: = near line 1, column 33 [from model as c where = c.sid = '5' ]; nested exception is org.hibernate.hql.ast.QuerySyntaxException: unexpected token: = near line 1, column 33 [from model as c where = c.sid = '5' ]

------解决方案--------------------
String hql ="from Model as c where = c.sid = '"+sid+"' "

这个拼错了。 where后面的= 是什么情况
------解决方案--------------------
查询语句语法问题，仔细检查一下。
------解决方案--------------------
SQL写错了嗯。当然就通不过了。
------解决方案--------------------


 String hql ="from Model as c where = c.sid = '"+sid+"' ";

改成


 String hql ="from Model as c where c.sid = '"+sid+"' ";

------解决方案--------------------
HTTP Status 500 - unexpected token: = near line 1, column 33 [from Model.as c where = c.sid = '5' ];

很明显啊哥们 where后面多个等号哎
------解决方案--------------------

问题解决了，sql的问题。