我一直在努力使用 jsp 中的 ajax 检查 id。因此,当用户尝试创建一个新帐户时,他们将键入他们想要创建的id,ajax将检查数据库中是否有相同的id。如果有,它返回"n",在 jsp 中它变为"不可用"。如果没有相同的 id,则返回"y",并在 jsp 中更改为"可用"。问题是它似乎只返回"n"。
这是javascript。
$('#email').keyup(function(){
var str = $(this).val();
var server = "idcheck";
$.post(server, {"email":str}, function(data){
if(data.ret =='y'){
$('#valid_check').html("available");
}else if(data.ret =='n'){
$('#valid_check').html("unavailable");
}
});
});
这是加入.jsp。
<label id="valid_check">check if you can use id</label>
<input id="email" name="email" type="email" class="form-style-join" placeholder="ex> mymail477@gmail.com" />
这是控制器。
@RequestMapping(value = "/idcheck", method = { RequestMethod.GET, RequestMethod.POST })
public @ResponseBody HashMap<String,String> idCheck(HttpServletRequest request,
HttpServletResponse response){
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
response.setHeader("Access-Control-Allow-Origin", "*");
response.setContentType("application/json");
response.setCharacterEncoding("UTF-8");
String mem_id = request.getParameter("mem_id");
int ret= memberMapper.memberIDCheck(mem_id);
HashMap<String,String> map = new HashMap<String,String>();
if(ret == 1){
map.put("ret", "y");
}else if( ret != 1){
map.put("ret", "n");
}
System.out.println(map);
return map;
}
这是映射器。
@Select("SELECT count(*) AS cnt FROM `member` WHERE mem_id=#{mem_id}")
public int memberIDCheck(String mem_id);
首先,您需要确保在 spring 控制器方法中获取输入字段值。所以在这里你发送一个参数{"电子邮件":str},但在控制器中你正在寻找"mem_id"。
试试这个代码:
@RequestMapping(value = "/idcheck", method = RequestMethod.POST })
public @ResponseBody HashMap<String,String> idCheck(HttpServletRequest request, HttpServletResponse response, @RequestBody String email){
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
response.setHeader("Access-Control-Allow-Origin", "*");
response.setContentType("application/json");
response.setCharacterEncoding("UTF-8");
String mem_id = email;
int ret= memberMapper.memberIDCheck(mem_id);
HashMap<String,String> map = new HashMap<String,String>();
if(ret == 1){
map.put("ret", "y");
}else if( ret != 1){
map.put("ret", "n");
}
System.out.println(map);
return map;
}
在这里我添加了一个@RequestBody。以便 ajax 请求中绑定的数据"电子邮件"可以映射到方法参数电子邮件。