[英]How can I validate @RequestParam using javax validations annotation
[英]How do i get form inputs to controller using @RequestParam Annotation
我正在嘗試從Spring Boot應用程序上的表單獲取用戶輸入。 我需要做什么?
我實現了一個登錄控制器,該控制器使用@RequestParam
批注來請求數據進行驗證,但得到的結果是該參數不存在。
// LoginController.java
@PostMapping(path = "/login")
public String userLogin(@RequestParam("email") String email,
@RequestParam("password") String password) {
// validate username and password
User user = userRepository.findUserByEmail(email);
System.out.println(user.getEmail()+" "+user.getPassword());
if(!(user.getEmail()==email) || !(user.getPassword()==password)){
logger.info("Invalid user details or not register");
return "login failed";
}
try{
loginService.login(email, password);
logger.info("User successfully login");
return "redirect:dashboard/profile";
}catch (Exception ex){
logger.info("",ex);
}
return "Successfully logged in ..";
}
Login.html
<form th:action="@{/login}" method="post" class="form-horizontal" role="form">
<form:hidden path/>
<div class="form-group">
<div class="mb-3">
<input type="email" class="form-control" name="email" id="email" placeholder="example@gmail.com" required="required">
</div>
</div>
<div class="form-group">
<div class="mb-3">
<input type="password" class="form-control" name="password" id="password" placeholder="" required="required">
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<label>
<input type="checkbox"> Remember me
</label>
<button type="submit" class="btn btn-success">Login</button>
</div>
</div>
</form>
我希望用戶在登錄之前可以收到電子郵件和密碼,但得到
2019-07-27 20:30:54.393 WARN 2900 --- [nio-8080-exec-2] .wsmsDefaultHandlerExceptionResolver:已解決[org.springframework.web.bind.MissingServletRequestParameterException:必需的字符串參數'email'不存在]
您必須從前端發送參數名稱:
const payload: FormData = new FormData();
payload.append("email", emai);
payload.append("password", password);
由於API設計錯誤和URL中的RequestParam不匹配而導致的問題。
將您的API更改為此:
@PostMapping(path = "/login") public String userLogin(@RequestBody Map<String, Object> user) {
String username=user.get("user").toString();
String password=user.get("password").toString();
}
您的請求正文JSON應該是這樣的。
{
"user":"USER",
"password":"pass5&234rf"
}
這是來自客戶端的POST請求的JSON有效負載(正文)。
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