控制器
@GetMapping({"/create", "/create/"})
public String createGet(CorePhrasesCreateForm corePhrasesCreateForm) {
return "semantics/phrases/core/create";
}
@PostMapping({"/create", "/create/"})
public String createPost(@Valid CorePhrasesCreateForm corePhrasesCreateForm,
BindingResult bindingResult,
RedirectAttributes atts) {
corePhraseFormValidator.validate(corePhrasesCreateForm, bindingResult);
if (bindingResult.hasErrors()) {
return "semantics/phrases/core/create";
}
atts.addAttribute("message", "Core phrases created");
String result = "";
return "redirect:/general/message";
}
类型
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" type="text/css" href="/css/main.css"/>
</head>
<body>
<a th:href="@{/admin/}">Admin</a>
<br>
<br>
<h1>Add core phrases to the database</h1>
<br>
<br>
<form method="POST" th:object="${corePhrasesCreateForm}">
<table>
<tr>
<td>Quotation cluster (" "):</td>
<td><input
type="number"
name="quotationCluster"
th:value="${quotationCluster}"/></td>
<td th:if="${#fields.hasErrors('quotationCluster')}" th:errors="*{quotationCluster}">quotationCluster</td>
</tr>
<tr>
<td>Quotation Exclamation cluster ("!")</td>
<td><input
type="number"
name="quotationExclamationCluster"
th:value="${quotationExclamationCluster}"/></td>
<td th:if="${#fields.hasErrors('quotationExclamationCluster')}" th:errors="*{quotationExclamationCluster}">
quotationExclamationCluster
</td>
</tr>
<tr>
<td>Phrases</td>
<td><textarea rows="5" cols="60" name="value" placeholder="Key phrases" th:text="${value}"></textarea></td>
<td class="error" th:if="${#fields.hasErrors('value')}" th:errors="*{value}">value</td>
</tr>
</table>
<br>
<br>
<br/>
<input type="submit" value="submit"/>
</form>
</body>
</html>
问题是：现在quotationCluster和quotationExcramationCluster默认发送0。也就是说，这两个字段为空，控制器将得到零。
但0是一个有意义的值。例如，一些DBMS可以从0开始其ID。因此，0是一个禁忌。
默认情况下，我需要-1。
你能帮我整理一下吗？