springboot+vue前后端分离项目-项目搭建10-验证码功能

本次演示的验证码功能只涉及前端，而且功能简单

1. 新建vue/src/components/ValidCode.vue

<template>
  <div class="ValidCode disabled-select"
       :style="`width:${width}; height:${height}`"
       @click="refreshCode"
  >
    <span v-for="(item, index) in codelist"
          :key="index"
          :style="getStyle(item)"
    >{{ item.code }}</span>
  </div>
</template>

<script>
export default {
  name: "ValidCode",
  model: {
    prop: 'value',
    event: 'input'
  },
  props: {
    width: {
      type: String,
      default: '100px'
    },
    height: {
      type: String,
      default: '40px'
    },
    length: {
      type: Number,
      default: 4
    },
    refresh: {
      type: Number
    }
  },
  data(){
    return{
      codelist: []
    }
  },
  watch: {
    refresh(){
      this.createdCode()
    }
  },
  mounted() {
    this.createdCode()
  },
  methods: {
    refreshCode(){
      this.createdCode()
    },
    createdCode(){
      const len = this.length
      const codeList = []
      const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
      const charsLen = chars.length
      //生成
      for (let i = 0; i < len; i++){
        const rgb = [Math.round(Math.random() * 220),Math.round(Math.random() * 240),Math.round(Math.random() * 220)]
        codeList.push({
          code: chars.charAt(Math.floor(Math.random() * charsLen)),
          color: `rgb(${rgb})`,
          fontSize: `${10 + (+[Math.floor(Math.random() * 10)] + 6)}px`,
          padding: `${[Math.floor(Math.random() * 10)]}px`,
          transform: `rotate(${Math.floor(Math.random() * 90) - Math.floor(Math.random() * 90)}deg)`
        })
      }
      // 指向
      this.codelist = codeList
      // 将当前数据派发出去
      // console.log(codeList.map(item +> item.code).join(''))
      this.$emit('input', codeList.map(item => item.code).join(''))
    },
    getStyle (data) {
      return `color: ${data.color}; font-size: ${data.fontSize}; padding: ${data.padding}: transform: ${data.transform}`
    }
  }
}
</script>

<style scoped>
.ValidCode{
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.ValidCode span{
  display: inline-block;
}
</style>

2. vue/src/views/LoginView.vue里引用

<template>
  <div style="width: 100%; height: 100vh; background-color: darkslateblue; overflow: hidden">
    <div style="width: 400px; margin: 150px auto">
      <div style="color: #cccccc; font-size: 30px; text-align: center; padding: 30px 0">欢迎登录</div>
      <el-form label-position="right" :model="form" size="normal" :rules="rules" ref="form">
        <el-form-item prop="username">
          <el-input :prefix-icon="Avatar" v-model="form.username" placeholder="请输入账号"/>
        </el-form-item>
        <el-form-item prop="password">
          <el-input :prefix-icon="Lock" v-model="form.password" show-password placeholder="请输入密码"/>
        </el-form-item>
        <el-form-item>
          <div style="display: flex">
            <el-input :prefix-icon="Key" v-model="form.validCode" style="width: 50%" placeholder="请输入验证码"/>
            <ValidCode @input="createValidCode"/>
          </div>
        </el-form-item>
        <el-form-item>
          <el-radio v-model="form.role" :label="1">管理员</el-radio>
          <el-radio v-model="form.role" :label="2">普通用户</el-radio>
        </el-form-item>
        <el-form-item>
          <el-button style="width: 100%;" type="primary" @click="login">登 录</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
import request from "@/utils/request";
import ValidCode from "@/components/ValidCode.vue";

export default {
  name: "LoginView",
  components: {
    ValidCode
  },
  data(){
    return {
      form: {role: 1},
      rules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' }
        ]
      },
      validCode: ''
    }
  },
  created() {
    sessionStorage.removeItem("user")
  },
  methods: {
    // 接收验证码组件提交的4位验证码
    createValidCode(data){
      this.validCode = data
    },
    login() {
      this.$refs.form.validate((valid) => {
        if(valid){
          if(!this.form.validCode) {
            this.$message.error("请填写验证码")
            return
          }
          if(this.form.validCode.toLowerCase() !== this.validCode.toLowerCase()) {
            this.$message.error("验证码错误")
            return
          }
          request.post("/user/login", this.form).then(res => {
            console.log(res)
            if (res.code === '0') {
              this.$message({
                type: "success",
                message: "登录成功"
              })
              sessionStorage.setItem("user", JSON.stringify(res.data))
              this.$router.push("/user") //登陆成功后跳转到主页
            } else {
              this.$message({
                type: "error",
                message: res.msg
              })
            }
          })
        }
      });
    }
  }
}
</script>

<script setup>
import { Avatar,Lock,Key } from '@element-plus/icons-vue'
</script>

<style scoped>

</style>

 效果：