<el-header>Header <el-button type="success">成功按钮</el-button> <el-input type="text" v-model="text" maxlength="30" show-word-limit></el-input> <el-input type="text" v-model="text" maxlength="30" show-word-limit></el-input> </el-header>更改代码使三个元素位于一行

可以使用 Flex 布局来实现这个需求。将父元素 `el-header` 的 `display` 属性设置为 `flex`，并添加 `align-items: center;` 样式可以让子元素垂直居中对齐。同时，给每个子元素添加 `flex: 1;` 样式可以让它们平分父元素的宽度，从而实现三个元素位于一行的效果。

下面是修改后的代码：

<el-header style="display: flex; align-items: center;">
  <el-button type="success" style="flex: 1;">成功按钮</el-button>
  <el-input type="text" v-model="text" maxlength="30" show-word-limit style="flex: 1;"></el-input>
  <el-input type="text" v-model="text" maxlength="30" show-word-limit style="flex: 1;"></el-input>
</el-header>

相关问题

<el-header>Header <div style="display: flex; align-items: center;"> <span style="display: flex; align-items: center; flex: 1;"> <el-button type="info" disabled>商品名称:</el-button> <el-input type="text" v-model="text" maxlength="30" show-word-limit></el-input> </span> <span style="display: flex; align-items: center; flex: 1;"> <el-button type="info" disabled>商品价格:</el-button> <el-input type="text" v-model="text"></el-input> </span> <span style="display: flex; align-items: center; flex: 1;"> <el-button type="success">成功按钮</el-button> </span> </div> </el-header>保留间距使代码更美观,三个span的元素位于同一行

可以在 `span` 元素外面包一层 `div` 元素，并设置 `div` 元素的样式为 `margin: 10px 0;`，即可保留上下间距，同时使代码更美观。

下面是修改后的代码：

<el-header>
  Header
  <div style="display: flex; align-items: center; margin: 10px 0;">
    <span style="display: flex; align-items: center; flex: 1;">
      <el-button type="info" disabled>商品名称:</el-button>
      <el-input type="text" v-model="text" maxlength="30" show-word-limit></el-input>
    </span>
    <span style="display: flex; align-items: center; flex: 1;">
      <el-button type="info" disabled>商品价格:</el-button>
      <el-input type="text" v-model="text"></el-input>
    </span>
    <span style="display: flex; align-items: center; flex: 1;">
      <el-button type="success">成功按钮</el-button>
    </span>
  </div>
</el-header>

jfinal+vue+el写一个项目demo

好的，下面我将为您提供一个简单的demo示例，使用jfinal+vue+el来实现一个用户管理系统。

1. 准备工作

首先，需要安装Java环境和Maven工具。然后，创建一个Maven项目，并添加以下依赖：

<dependency>
    <groupId>com.jfinal</groupId>
    <artifactId>jfinal</artifactId>
    <version>4.9.06</version>
</dependency>

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.78</version>
</dependency>

<dependency>
    <groupId>com.github.pagehelper</groupId>
    <artifactId>pagehelper-spring-boot-starter</artifactId>
    <version>1.3.0</version>
</dependency>

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.26</version>
</dependency>

2. 创建数据库表

在MySQL中创建一个名为user的表，包含以下字段：

- id
- username
- password
- nickname
- email

3. 创建后端代码

创建一个UserController类，用于处理用户相关的请求。

public class UserController extends Controller {

    public void index() {
        render("index.html");
    }

    public void list() {
        int pageNumber = getParaToInt("page");
        int pageSize = getParaToInt("limit");
        Page<User> userList = User.dao.paginate(pageNumber, pageSize, "select *", "from user");
        renderJson(JSON.toJSONString(userList));
    }

    public void save() {
        User user = getModel(User.class, "");
        if (user.save()) {
            renderJson(JSON.toJSONString(Result.success()));
        } else {
            renderJson(JSON.toJSONString(Result.failure("保存失败")));
        }
    }

    public void update() {
        User user = getModel(User.class, "");
        if (user.update()) {
            renderJson(JSON.toJSONString(Result.success()));
        } else {
            renderJson(JSON.toJSONString(Result.failure("更新失败")));
        }
    }

    public void delete() {
        Integer id = getParaToInt("id");
        if (User.dao.deleteById(id)) {
            renderJson(JSON.toJSONString(Result.success()));
        } else {
            renderJson(JSON.toJSONString(Result.failure("删除失败")));
        }
    }
}

创建一个User类，用于操作数据库。

public class User extends Model<User> {

    public static final User dao = new User().dao();

    public Integer getId() {
        return getInt("id");
    }

    public void setId(Integer id) {
        set("id", id);
    }

    public String getUsername() {
        return getStr("username");
    }

    public void setUsername(String username) {
        set("username", username);
    }

    public String getPassword() {
        return getStr("password");
    }

    public void setPassword(String password) {
        set("password", password);
    }

    public String getNickname() {
        return getStr("nickname");
    }

    public void setNickname(String nickname) {
        set("nickname", nickname);
    }

    public String getEmail() {
        return getStr("email");
    }

    public void setEmail(String email) {
        set("email", email);
    }
}

4. 创建前端代码

创建一个index.html文件，用于展示用户列表和添加用户。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>User Management System</title>
    <link rel="stylesheet" href="https://cdn.staticfile.org/element-ui/2.15.1/theme-chalk/index.css">
</head>
<body>
<div id="app">
    <el-container>
        <el-header>
            <h1 style="color: white">用户管理系统</h1>
        </el-header>
        <el-main>
            <el-table :data="userList" border style="width: 100%">
                <el-table-column label="ID" prop="id"></el-table-column>
                <el-table-column label="用户名" prop="username"></el-table-column>
                <el-table-column label="昵称" prop="nickname"></el-table-column>
                <el-table-column label="邮箱" prop="email"></el-table-column>
                <el-table-column label="操作">
                    <template slot-scope="scope">
                        <el-button type="primary" @click="editUser(scope.row)">编辑</el-button>
                        <el-button type="danger" @click="deleteUser(scope.row)">删除</el-button>
                    </template>
                </el-table-column>
            </el-table>
            <el-pagination :total="total" :page-size="pageSize" :current-page.sync="currentPage" @current-change="getPage"></el-pagination>
            <el-form :model="user" ref="userForm" label-width="80px" style="margin-top: 20px;">
                <el-form-item label="用户名" prop="username">
                    <el-input v-model="user.username" placeholder="请输入用户名"></el-input>
                </el-form-item>
                <el-form-item label="密码" prop="password">
                    <el-input v-model="user.password" placeholder="请输入密码"></el-input>
                </el-form-item>
                <el-form-item label="昵称" prop="nickname">
                    <el-input v-model="user.nickname" placeholder="请输入昵称"></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="user.email" placeholder="请输入邮箱"></el-input>
                </el-form-item>
                <el-form-item>
                    <el-button type="primary" @click="saveUser">保存</el-button>
                    <el-button @click="resetForm">重置</el-button>
                </el-form-item>
            </el-form>
        </el-main>
    </el-container>
</div>
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<script src="https://cdn.staticfile.org/element-ui/2.15.1/index.js"></script>
<script src="https://cdn.staticfile.org/axios/0.21.1/axios.min.js"></script>
<script type="text/javascript">
    new Vue({
        el: '#app',
        data: {
            userList: [],
            total: 0,
            pageSize: 10,
            currentPage: 1,
            user: {
                username: '',
                password: '',
                nickname: '',
                email: ''
            }
        },
        created: function () {
            this.getPage(1);
        },
        methods: {
            getPage: function (page) {
                let _this = this;
                axios.get('/user/list', {
                    params: {
                        page: page,
                        limit: _this.pageSize
                    }
                }).then(function (response) {
                    _this.userList = response.data.list;
                    _this.total = response.data.total;
                }).catch(function (error) {
                    console.log(error);
                });
            },
            editUser: function (row) {
                this.user = row;
            },
            deleteUser: function (row) {
                let _this = this;
                let id = row.id;
                axios.post('/user/delete', {
                    id: id
                }).then(function (response) {
                    _this.getPage(_this.currentPage);
                }).catch(function (error) {
                    console.log(error);
                });
            },
            saveUser: function () {
                let _this = this;
                this.$refs.userForm.validate(function (valid) {
                    if (valid) {
                        axios.post('/user/save', _this.user).then(function (response) {
                            _this.getPage(_this.currentPage);
                            _this.resetForm('userForm');
                        }).catch(function (error) {
                            console.log(error);
                        });
                    } else {
                        return false;
                    }
                });
            },
            resetForm: function (formName) {
                this.$refs[formName].resetFields();
                this.user = {
                    username: '',
                    password: '',
                    nickname: '',
                    email: ''
                };
            }
        }
    });
</script>
</body>
</html>

5. 配置路由

在JFinalConfig类中配置路由。

public class DemoConfig extends JFinalConfig {

    @Override
    public void configConstant(Constants me) {
        me.setDevMode(true);
    }

    @Override
    public void configRoute(Routes me) {
        me.add("/user", UserController.class);
    }

    @Override
    public void configPlugin(Plugins me) {
        DruidPlugin dp = new DruidPlugin("jdbc:mysql://localhost:3306/demo?useSSL=false&serverTimezone=Asia/Shanghai&characterEncoding=utf-8", "root", "123456");
        me.add(dp);
        ActiveRecordPlugin arp = new ActiveRecordPlugin(dp);
        me.add(arp);
        arp.addMapping("user", User.class);
    }

    @Override
    public void configInterceptor(Interceptors me) {
    }

    @Override
    public void configHandler(Handlers me) {
    }
}

6. 运行项目

运行项目，访问http://localhost:8080/user/index即可看到用户管理系统页面。