<select th:field="*{user}"> <option value="">请选择用户</option> <option th:each="user : ${byUser}" th:value="${user.user_id}" th:text="${user.user_name}"></option> </select>,爆红
时间: 2024-04-06 14:29:50 浏览: 12
这段代码的爆红可能是由于th:field属性中的"user"字段没有在Model中声明,或者Model中的"user"字段类型与select表单的数据类型不匹配。请检查Model中的字段定义并确保其与表单元素的名称和类型匹配。此外,也可以检查th:each中的"user"变量是否正确定义。如果问题仍然存在,请提供更多的代码和错误信息以便进一步排查。
相关问题
用户修改后, 点击相同按钮数据重新渲染 <template> <div id="app"> <div> <span>姓名:</span> <input type="text" /> </div> <div> <span>年龄:</span> <input type="number" /> </div> <div> <span>性别:</span> <select > <option value="男">男</option> <option value="女">女</option> </select> </div> <div> <button >添加/修改</button> </div> <div> <table border="1" cellpadding="10" cellspacing="0" > <tr> <th>序号</th> <th>姓名</th> <th>年龄</th> <th>性别</th> <th>操作</th> </tr> <tr > <td></td> <td></td> <td></td> <td></td> <td> <button >删除</button> <button >编辑</button> </td> </tr> </table> </div> </div> </template> <script> export default { } </script>
你需要在 `<input>` 和 `<select>` 标签上添加 `v-model` 指令来实现双向绑定,以便在用户输入数据时,自动更新数据模型。同时,你需要添加一个数组用于存储用户数据,在点击“添加/修改”按钮时,将数据添加到数组中。还需要在表格中用 `v-for` 指令遍历数组,渲染每个用户的数据,并添加“删除”和“编辑”按钮的功能。具体代码如下:
<template>
<div id="app">
<div>
<span>姓名:</span>
<input type="text" v-model="name" />
</div>
<div>
<span>年龄:</span>
<input type="number" v-model="age" />
</div>
<div>
<span>性别:</span>
<select v-model="gender">
<option value="男">男</option>
<option value="女">女</option>
</select>
</div>
<div>
<button @click="addOrUpdateUser">添加/修改</button>
</div>
<div>
<table border="1" cellpadding="10" cellspacing="0">
<tr>
<th>序号</th>
<th>姓名</th>
<th>年龄</th>
<th>性别</th>
<th>操作</th>
</tr>
<tr v-for="(user, index) in userList" :key="index">
<td>{{ index + 1 }}</td>
<td>{{ user.name }}</td>
<td>{{ user.age }}</td>
<td>{{ user.gender }}</td>
<td>
<button @click="deleteUser(index)">删除</button>
<button @click="editUser(index)">编辑</button>
</td>
</tr>
</table>
</div>
</div>
</template>
<script>
export default {
data() {
return {
name: '',
age: '',
gender: '男',
userList: []
}
},
methods: {
addOrUpdateUser() {
// 新建一个用户对象
const user = {
name: this.name,
age: this.age,
gender: this.gender
}
// 判断是否是修改操作
if (this.editIndex !== undefined) {
// 如果是修改操作,则替换原有用户数据
this.userList.splice(this.editIndex, 1, user)
this.editIndex = undefined
} else {
// 如果是添加操作,则将用户数据添加到数组中
this.userList.push(user)
}
// 清空输入框中的数据
this.name = ''
this.age = ''
this.gender = '男'
},
deleteUser(index) {
// 删除指定位置的用户数据
this.userList.splice(index, 1)
},
editUser(index) {
// 将要修改的用户数据填入输入框
const user = this.userList[index]
this.name = user.name
this.age = user.age
this.gender = user.gender
// 记录当前的编辑位置
this.editIndex = index
}
}
}
</script>
<!DOCTYPE html> <html> <head> <title>表格形式</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <style> table, th, td { border: 1px solid black; border-collapse: collapse; padding: 5px; } </style> <script> // 添加一行 function addRow(tableID) { var table = document.getElementById(tableID); var rowCount = table.rows.length; var row = table.insertRow(rowCount); for(var i = 0; i < 5; i++){ var cell = row.insertCell(i); cell.innerHTML = '<select><option value="1">选项1</option><option value="2">选项2</option><option value="3">选项3</option></select>'; cell.onclick = function(){ this.firstChild.style.display = 'block'; } cell.firstChild.onblur = function(){ this.style.display = 'none'; } cell.firstChild.style.display = 'none'; } } </script> </head> <body> <table id="myTable"> <thead> <tr> <th>列1</th> <th>列2</th> <th>列3</th> <th>列4</th> <th>列5</th> </tr> </thead> <tbody> <tr> <td><select><option value="1">选项1</option><option value="2">选项2</option><option value="3">选项3</option></select></td> <td><select><option value="1">选项1</option><option value="2">选项2</option><option value="3">选项3</option></select></td> <td><select><option value="1">选项1</option><option value="2">选项2</option><option value="3">选项3</option></select></td> <td><select><option value="1">选项1</option><option value="2">选项2</option><option value="3">选项3</option></select></td> <td><select><option value="1">选项1</option><option value="2">选项2</option><option value="3">选项3</option></select></td> </tr> </tbody> </table> <button onclick="addRow('myTable')">增加</button> </body> </html>将这段代码用bootstrap进行优化
Sure! 这个表格的代码可以用 Bootstrap 进行优化,具体的代码如下:
<!DOCTYPE html>
<html>
<head>
<title>表格形式</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- 引入 Bootstrap 的 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.5.0/css/bootstrap.min.css">
<style>
table { border: 1px solid black; border-collapse: collapse; padding: 5px; }
</style>
</head>
<body>
<div class="container">
<table class="table table-bordered table-hover">
<thead>
<tr>
<th>列1</th>
<th>列2</th>
<th>列3</th>
<th>列4</th>
<th>列5</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<select class="form-control">
<option value="1">选项1</option>
<option value="2">选项2</option>
<option value="3">选项3</option>
</select>
</td>
<td>
<select class="form-control">
<option value="1">选项1</option>
<option value="2">选项2</option>
<option value="3">选项3</option>
</select>
</td>
<td>
<select class="form-control">
<option value="1">选项1</option>
<option value="2">选项2</option>
<option value="3">选项3</option>
</select>
</td>
<td>
<select class="form-control">
<option value="1">选项1</option>
<option value="2">选项2</option>
<option value="3">选项3</option>
</select>
</td>
<td>
<select class="form-control">
<option value="1">选项1</option>
<option value="2">选项2</option>
<option value="3">选项3</option>
</select>
</td>
</tr>
</tbody>
</table>
<div class="text-center">
<button class="btn btn-primary" onClick="addRow('myTable')">增加</button>
</div>
</div>
<!-- 引入 Bootstrap 的 JS 文件 -->
<script src="https://cdn.staticfile.org/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdn.staticfile.org/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://cdn.staticfile.org/twitter-bootstrap/4.5.0/js/bootstrap.min.js"></script>
<script>
// 添加一行
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
var row = table.insertRow(rowCount);
for(var i = 0; i < 5; i++) {
var cell = row.insertCell(i);
cell.innerHTML = '<select class="form-control"><option value="1">选项1</option><option value="2">选项2</option><option value="3">选项3</option></select>';
cell.onclick = function(){ this.firstChild.style.display = 'block'; }
cell.firstChild.onblur = function(){ this.style.display = 'none'; }
cell.firstChild.style.display = 'none'; }
}
</script>
</body>
</html>
我希望这个帮助到你!