当我按下保存按钮时，ajax 不起作用。页面重新加载。这是我的 indx 页面和 Controller 功能。 网址是 --- http://localhost:8082/spring-test/index
Controller
@RequestMapping(value = "/saveUser", method = RequestMethod.POST)
public String saveUser(@Valid @ModelAttribute("User") User user, BindingResult bindingResult,
ModelMap model, HttpServletRequest request, RedirectAttributes redirectAttrs) {
System.out.println("user: " + user.getUserId());
String type = request.getParameter("update") != null ? request.getParameter("update") : "";
String delete = request.getParameter("delete") != null ? request.getParameter("delete") : "";
if (type.equalsIgnoreCase("update") || delete.equalsIgnoreCase("delete")) {
User userDb = userService.getUserById(user.getUserId());
user.setUserId(userDb.getUserId());
}
if (bindingResult.hasErrors()) {
System.out.println("=====================error======================" + bindingResult.getFieldErrors());
return "index";
}
if (delete.equalsIgnoreCase("delete")) {
userService.deleteUser(user.getUserId());
} else {
userService.saveUser(user);
}
//model.clear();
model.clear();
return "redirect:/index";
}
index.html
<html xmlns:th="http://www.thymeleaf.org" xmlns:tiles="http://www.thymeleaf.org" class="no-js">
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://cdn.datatables.net/1.10.13/css/jquery.dataTables.min.css" />
<script src="https://cdn.datatables.net/1.10.13/js/jquery.dataTables.min.js"></script>
<script>
$(document).ready(function() {
$('#myTable').DataTable();
$('#btnSave').click(function(e) {
var dataUser = $("#name").val();
var dataPass = $("#pwd").val();
var userDdata = {
"name": dateUser,
"pass": dataPass
}
$.ajax({
type: "POST",
url: "/spring-test/saveUser",
data: userData,
success: function(response) {
alert(1)
},
error: function(e) {
alert('Error: ' + e);
}
});
}
});
</script>
</head>
<body>
<div class="container col-sm-12 col-md-12" style="height:20px;background:#85a3e0;">
</div>
<div class="container col-sm-12 col-md-12">
<h3 class="text-center">Super Admin</h3>
<div class="col-md-4 col-sm-4" style="margin-left: 6%;">
<form class="form-horizontal" role="form" th:action="@{/saveUser}" th:object="${user}" method="post">
<div class="form-group">
<label class="control-label col-sm-3" for="pwd">Username:</label>
<div class="col-sm-9">
<input type="text" class="form-control" id="name" placeholder="Enter Name" th:field="*{userName}" />
<input type="hidden" th:field="*{userId}" />
</div>
</div>
<div class="form-group">
<label class="control-label col-sm-3" for="pwd">Password:</label>
<div class="col-sm-9">
<input type="text" class="form-control" id="pwd" placeholder="Enter password" th:field="*{password}" />
</div>
</div>
<div class="form-group">
<div class=" col-sm-12 text-right">
<button type="submit" class="btn btn-default" name="cancel" value="cancel">Cancel</button>
<button id="btnSave" type="submit" class="btn btn-primary" name="save" value="save">Save</button>
<button type="submit" class="btn btn-primary" name="update" value="update">Update</button>
<button type="submit" class="btn btn-primary" name="delete" value="delete">Delete</button>
</div>
</div>
</form>
</div>
</div>
</body>
</html>
这里有什么问题吗？ 添加 ajax 函数后，我的 dataTable 也没有出现。
最佳答案
由于您已经有一个用于表单提交的操作( th:action="@{/saveUser}")，因此它将直接发送数据，而不是通过 AJAX。为了使其正常工作，您需要防止这种默认行为，如下所示。
$('#btnSave').click(function(e) {
e.preventDefault()
//Then do your stuff
});
关于java - 当我尝试保存数据时 Ajax 不工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42873943/