1.1 request.js请求工具

//定制请求的实例//导入axios  npm install axios
import axios from 'axios';
//定义一个变量,记录公共的前缀  ,  baseURL
const baseURL = '/api';
const instance = axios.create({baseURL})//添加响应拦截器
instance.interceptors.response.use(result=>{return result.data;},err=>{alert('服务异常');return Promise.reject(err);//异步的状态转化成失败的状态}
)export default instance;

2.1 编写注册接口

//导入request.js请求工具
import request from '@/utils/request.js'//提供调用注册接口的函数
export const userRegisterService = (registerData)=>{//借助于UrlSearchParams完成传递const params = new URLSearchParams()for(let key in registerData){params.append(key,registerData[key]);}return request.post('/user/register',params);
}

3.1 编写页面

3.2 给表单绑定数据

3.3 定义表单校验规则

3.4 调用注册接口

```html
<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref } from 'vue'
//控制注册与登录表单的显示， 默认显示注册
const isRegister = ref(false)//定义数据模型
const registerData = ref({username: '',password: '',rePassword: ''
})//校验密码的函数
const checkRePassword = (rule, value, callback) => {if (value === '') {callback(new Error('请再次确认密码'))} else if (value !== registerData.value.password) {callback(new Error('请确保两次输入的密码一样'))} else {callback()}
}//定义表单校验规则
const rules = {username: [{ required: true, message: '请输入用户名', trigger: 'blur' },{ min: 5, max: 16, message: '长度为5~16位非空字符', trigger: 'blur' }],password: [{ required: true, message: '请输入密码', trigger: 'blur' },{ min: 5, max: 16, message: '长度为5~16位非空字符', trigger: 'blur' }],rePassword: [{ validator: checkRePassword, trigger: 'blur' }]
}//调用后台接口,完成注册
import { userRegisterService} from '@/api/user.js'
const register = async () => {//registerData是一个响应式对象,如果要获取值,需要.valuelet result = await userRegisterService(registerData.value);if (result.code === 0) {//成功了alert(result.msg ? result.msg : '注册成功');}else{//失败了alert('注册失败')} //alert(result.msg ? result.msg : '注册成功');// ElMessage.success(result.msg ? result.msg : '注册成功')
}</script><template><el-row class="login-page"><el-col :span="12" class="bg"></el-col><el-col :span="6" :offset="3" class="form"><!-- 注册表单 --><el-form ref="form" size="large" autocomplete="off" v-if="isRegister" :model="registerData" :rules="rules"><el-form-item><h1>注册</h1></el-form-item><el-form-item prop="username"><el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input></el-form-item><el-form-item prop="password"><el-input :prefix-icon="Lock" type="password" placeholder="请输入密码"v-model="registerData.password"></el-input></el-form-item><el-form-item prop="rePassword"><el-input :prefix-icon="Lock" type="password" placeholder="请输入再次密码"v-model="registerData.rePassword"></el-input></el-form-item><!-- 注册按钮 --><el-form-item><el-button class="button" type="primary" auto-insert-space @click="register">注册</el-button></el-form-item><el-form-item class="flex"><el-link type="info" :underline="false" @click="isRegister = false">← 返回</el-link></el-form-item></el-form><!-- 登录表单 --><el-form ref="form" size="large" autocomplete="off" v-else><el-form-item><h1>登录</h1></el-form-item><el-form-item><el-input :prefix-icon="User" placeholder="请输入用户名"></el-input></el-form-item><el-form-item><el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码"></el-input></el-form-item><el-form-item class="flex"><div class="flex"><el-checkbox>记住我</el-checkbox><el-link type="primary" :underline="false">忘记密码？</el-link></div></el-form-item><!-- 登录按钮 --><el-form-item><el-button class="button" type="primary" auto-insert-space>登录</el-button></el-form-item><el-form-item class="flex"><el-link type="info" :underline="false" @click="isRegister = true">注册 →</el-link></el-form-item></el-form></el-col></el-row>
</template><style lang="scss" scoped>
/* 样式 */
.login-page {height: 100vh;background-color: #fff;.bg {background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,url('@/assets/login_bg.jpg') no-repeat center / cover;border-radius: 0 20px 20px 0;}.form {display: flex;flex-direction: column;justify-content: center;user-select: none;.title {margin: 0 auto;}.button {width: 100%;}.flex {width: 100%;display: flex;justify-content: space-between;}}
}
</style>
```

3.1 跨域问题

3.1.1 修改request.js

//定制请求的实例//导入axios  npm install axios
import axios from 'axios';
//定义一个变量,记录公共的前缀  ,  baseURL
const baseURL = '/api';
const instance = axios.create({baseURL})//添加响应拦截器
instance.interceptors.response.use(result=>{return result.data;},err=>{alert('服务异常');return Promise.reject(err);//异步的状态转化成失败的状态}
)export default instance;

3.1.2 修改vite.config.js

import { fileURLToPath, URL } from 'node:url'import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'// https://vitejs.dev/config/
export default defineConfig({plugins: [vue(),],resolve: {alias: {'@': fileURLToPath(new URL('./src', import.meta.url))}},server:{proxy:{'/api':{//获取路径中包含了/api的请求target:'http://localhost:8080',//后台服务所在的源changeOrigin:true,//修改源rewrite:(path)=>path.replace(/^\/api/,'')///api替换为''}}}
})

4.1 测试