vue登录页+验证码+MD5加密

一，验证码功能
1，创建一个组件。显示验证码图片

<template>
 <div class="s-canvas">
  <canvas id="s-canvas" :width="contentWidth" :height="contentHeight"></canvas>
 </div>
</template>
<script>
export default{
 name: 'SIdentify',
 props: {
  identifyCode: { // 默认注册码
   type: String,
   default: '1234'
  },
  fontSizeMin: { // 字体最小值
   type: Number,
   default: 25
  },
  fontSizeMax: { // 字体最大值
   type: Number,
   default: 35
  },
  backgroundColorMin: { // 验证码图片背景色最小值
   type: Number,
   default: 200
  },
  backgroundColorMax: { // 验证码图片背景色最大值
   type: Number,
   default: 220
  },
  dotColorMin: { // 背景干扰点最小值
   type: Number,
   default: 60
  },
  dotColorMax: { // 背景干扰点最大值
   type: Number,
   default: 120
  },
  contentWidth: { // 容器宽度
   type: Number,
   default: 90
  },
  contentHeight: { // 容器高度
   type: Number,
   default: 38
  }
 },
 methods: {
  // 生成一个随机数
  randomNum (min, max) {
   return Math.floor(Math.random() * (max - min) + min)
  },
  
  // 生成一个随机的颜色
  randomColor (min, max) {
   let r = this.randomNum(min, max)
   let g = this.randomNum(min, max)
   let b = this.randomNum(min, max)
   return 'rgb(' + r + ',' + g + ',' + b + ')'
  },
  
  drawPic () {
   let canvas = document.getElementById('s-canvas')
   let ctx = canvas.getContext('2d')
   ctx.textBaseline = 'bottom'
   // 绘制背景
   ctx.fillStyle = '#e6ecfd'
   ctx.fillRect(0, 0, this.contentWidth, this.contentHeight)
   // 绘制文字
   for (let i = 0; i < this.identifyCode.length; i++) {
    this.drawText(ctx, this.identifyCode[i], i)
   }
   this.drawLine(ctx)
   this.drawDot(ctx)
  },
  
  drawText (ctx, txt, i) {
   ctx.fillStyle = this.randomColor(50, 160) // 随机生成字体颜色
   ctx.font = this.randomNum(this.fontSizeMin, this.fontSizeMax) + 'px SimHei' // 随机生成字体大小
   let x = (i + 1) * (this.contentWidth / (this.identifyCode.length + 1))
   let y = this.randomNum(this.fontSizeMax, this.contentHeight - 5)
   var deg = this.randomNum(-30, 30)
   // 修改坐标原点和旋转角度
   ctx.translate(x, y)
   ctx.rotate(deg * Math.PI / 180)
   ctx.fillText(txt, 0, 0)
   // 恢复坐标原点和旋转角度
   ctx.rotate(-deg * Math.PI / 180)
   ctx.translate(-x, -y)
  },
  
  drawLine (ctx) {
   // 绘制干扰线
   for (let i = 0; i < 4; i++) {
    ctx.strokeStyle = this.randomColor(100, 200)
    ctx.beginPath()
    ctx.moveTo(this.randomNum(0, this.contentWidth), this.randomNum(0, this.contentHeight))
    ctx.lineTo(this.randomNum(0, this.contentWidth), this.randomNum(0, this.contentHeight))
    ctx.stroke()
   }
  },
  
  drawDot (ctx) {
   // 绘制干扰点
   for (let i = 0; i < 30; i++) {
    ctx.fillStyle = this.randomColor(0, 255)
    ctx.beginPath()
    ctx.arc(this.randomNum(0, this.contentWidth), this.randomNum(0, this.contentHeight), 1, 0, 2 * Math.PI)
    ctx.fill()
   }
  }
 },
 watch: {
  identifyCode () {
   this.drawPic()
  }
 },
 mounted () {
  this.drawPic()
 }
}
</script>

2，在登录页面中 验证码输输入框

<el-form-item prop="verificationCode">
  <el-input type="text" v-model="loginForm.verificationCode" placeholder="- - - -">
   <template slot="prepend">验证码</template>
   <template slot="append">
    <div class="login-code" @click="refreshCode">
     <Identify :identifyCode="identifyCode"></Identify>
    </div>
   </template>
  </el-input>
 </el-form-item>

//引入验证码组件
import Identify from './identify'

3，登录按钮

<el-button-group>
        <el-button style="100%" @click="handleLogin" type="primary">登录</el-button>
 </el-button-group>

4，在data中

data() {
    const validateUsername = (rule, value, callback) => {
      if (!value) {
        callback(new Error("请输入用户名"));
      } else {
        callback();
      }
    };
    const validatePassword = (rule, value, callback) => {
      if (!value) {
        callback(new Error("请输入密码"));
      } else {
        callback();
      }
    };
    const validateCode = (rule, value, callback) => {
      if (value.toLowerCase() !== this.identifyCode.toLowerCase()) {
        this.refreshCode();
        callback(new Error("请填写正确验证码"));
      } else {
        callback();
      }
    };
    return {
      loginForm: {
        username: "",
        password: "",
        verificationCode: ""
      },
      loginRules: {
        username: [
          { required: true, trigger: "blur", validator: validateUsername }
        ],
        password: [
          { required: true, trigger: "blur", validator: validatePassword }
        ],
        verificationCode: [
          { required: true, trigger: "blur", validator: validateCode }
        ]
      },
      passwordType: "password",
      capsTooltip: false,
      loading: false,
      identifyCodes: "1234567890abcdefjhijklinopqrsduvwxyz",
      identifyCode: ""
    };
  },

5，在mounted中

mounted () {
  // 初始化验证码
  this.identifyCode = ''
  this.makeCode(this.identifyCodes, 4)
 },

6，在method中

    //验证码事件
    refreshCode() {
      this.identifyCode = "";
      this.makeCode(this.identifyCodes, 4);
    },
    makeCode(o, l) {
      for (let i = 0; i < l; i++) {
        this.identifyCode += this.identifyCodes[
          this.randomNum(0, this.identifyCodes.length)
        ];
      }
    },
    randomNum(min, max) {
      return Math.floor(Math.random() * (max - min) + min);
    }，
  //登录事件
  hhandleLogin(formName) {
      let paramt = {
        username: this.loginForm.username,
        password: this.$md5(this.loginForm.password)
      };

      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true;
          this.$store.dispatch("Login/getLogin", paramt).then(res => {
            let userList = res.data.data;
            sessionStorage.setItem("token", res.data.data.token);
            //vuex中的数据刷新页面会消失
            this.$router.push("/layout");
            this.loading = false;
          })
          .catch(() => {
              this.loading = false;
            });
        } else {
          console.log("error submit!!");
          return false;
        }
      });
    },

二，MD5加密
1、npm安装

npm install --save js-md5

2,第一种使用方法

在需要使用的项目文件中引入：
import md5 from 'js-md5';
    
使用：
md5('mima')//612341288a285f5b188163482320e88f

3,第二种使用方法

在main.js文件中将md5转换成vue原型：
    import md5 from 'js-md5';
    Vue.prototype.$md5 = md5;

    在需要用到的文件中使用：
    this.$md5('mima')//612341288a285f5b188163482320e88f

最后附登录页完整代码

<template>
  <div class="login-container">
    <nav></nav>
    <main>
      <div class="main-l"></div>
      <div class="main-r">
        <img src="../../assets/image/l-t.png" alt />
        <div class="form-login">
          <el-form
            ref="loginForm"
            :model="loginForm"
            :rules="loginRules"
            class="login-form"
            autocomplete="on"
            label-position="left"
          >
            <el-form-item prop="username">
              <span class="svg-container">
                <i class="el-icon-user"></i>
              </span>
              <el-input
                ref="username"
                v-model="loginForm.username"
                placeholder="请输入用户名"
                name="username"
                type="text"
                tabindex="1"
                autocomplete="on"
              />
            </el-form-item>

            <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
              <el-form-item prop="password">
                <span class="svg-container">
                  <i class="el-icon-lock"></i>
                </span>
                <el-input
                  :key="passwordType"
                  ref="password"
                  v-model="loginForm.password"
                  :type="passwordType"
                  placeholder="请输入密码"
                  name="password"
                  tabindex="2"
                  autocomplete="on"
                  @keyup.native="checkCapslock"
                  @blur="capsTooltip = false"
                  @keyup.enter.native="handleLogin"
                />
                <span class="show-pwd" @click="showPwd">
                  <i
                    :class="passwordType === 'password' ? 'iconfont zhzyguanbi-yanjing' : 'el-icon-view'"
                  ></i>
                </span>
              </el-form-item>
            </el-tooltip>
            <el-form-item prop="verificationCode">
              <span class="svg-container">
                <i class="el-icon-key"></i>
              </span>
              <el-input
                ref="verificationCode"
                v-model="loginForm.verificationCode"
                placeholder="请输入验证码"
                name="verificationCode"
                type="text"
                tabindex="1"
                autocomplete="on"
              >
                <template slot="append">
                  <div class="login-code" @click="refreshCode">
                    <Identify :identifyCode="identifyCode"></Identify>
                  </div>
                </template>
              </el-input>
            </el-form-item>
            <el-button
              :loading="loading"
              type="primary"
              style="100%;height:60px;font-size:20px"
              @click.native.prevent="handleLogin"
            >立即登录</el-button>
          </el-form>
        </div>
      </div>
    </main>
  </div>
</template>

<script>
import Identify from "../../components/VerificationCode/VerificationCode";
import { login } from "../../api/login";
import { mapActions } from "vuex";
export default {
  name: "Login",
  components: { Identify },
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!value) {
        callback(new Error("请输入用户名"));
      } else {
        callback();
      }
    };
    const validatePassword = (rule, value, callback) => {
      if (!value) {
        callback(new Error("请输入密码"));
      } else {
        callback();
      }
    };
    const validateCode = (rule, value, callback) => {
      if (value.toLowerCase() !== this.identifyCode.toLowerCase()) {
        this.refreshCode();
        callback(new Error("请填写正确验证码"));
      } else {
        callback();
      }
    };
    return {
      loginForm: {
        username: "",
        password: "",
        verificationCode: ""
      },
      loginRules: {
        username: [
          { required: true, trigger: "blur", validator: validateUsername }
        ],
        password: [
          { required: true, trigger: "blur", validator: validatePassword }
        ],
        verificationCode: [
          { required: true, trigger: "blur", validator: validateCode }
        ]
      },
      passwordType: "password",
      capsTooltip: false,
      loading: false,
      identifyCodes: "1234567890abcdefjhijklinopqrsduvwxyz",
      identifyCode: ""
    };
  },
  created() {},
  mounted() {
    if (this.loginForm.username === "") {
      this.$refs.username.focus();
    } else if (this.loginForm.password === "") {
      this.$refs.password.focus();
    }
    // 初始化验证码
    this.identifyCode = "";
    this.makeCode(this.identifyCodes, 4);
  },
  methods: {
    checkCapslock({ shiftKey, key } = {}) {
      if (key && key.length === 1) {
        if (
          (shiftKey && (key >= "a" && key <= "z")) ||
          (!shiftKey && (key >= "A" && key <= "Z"))
        ) {
          this.capsTooltip = true;
        } else {
          this.capsTooltip = false;
        }
      }
      if (key === "CapsLock" && this.capsTooltip === true) {
        this.capsTooltip = false;
      }
    },
    showPwd() {
      if (this.passwordType === "password") {
        this.passwordType = "";
      } else {
        this.passwordType = "password";
      }
      this.$nextTick(() => {
        this.$refs.password.focus();
      });
    },
   handleLogin(formName) {
      let paramt = {
        username: this.loginForm.username,
        password: this.$md5(this.loginForm.password)
      };

      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true;
          this.$store.dispatch("Login/getLogin", paramt).then(res => {
            let userList = res.data.data;
            sessionStorage.setItem("token", res.data.data.token);
            //vuex中的数据刷新页面会消失
            this.$router.push("/layout");
            this.loading = false;
          })
          .catch(() => {
              this.loading = false;
            });
        } else {
          console.log("error submit!!");
          return false;
        }
      });
    },
    //验证码事件
    refreshCode() {
      this.identifyCode = "";
      this.makeCode(this.identifyCodes, 4);
    },
    makeCode(o, l) {
      for (let i = 0; i < l; i++) {
        this.identifyCode += this.identifyCodes[
          this.randomNum(0, this.identifyCodes.length)
        ];
      }
    },
    randomNum(min, max) {
      return Math.floor(Math.random() * (max - min) + min);
    }
  }
};
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
  nav {
    width: 555px;
    height: 80px;
    background: pink;
    margin: 0 auto;
    margin-top: 150px;
    margin-bottom: 30px;
    background: url("../../assets/image/login-text.png") center no-repeat;
  }
  main {
    width: 910px;
    height: 505px;
    background: url("../../assets/image/l-code.png") center no-repeat;
    margin: 0 auto;
    display: flex;
    .main-l {
      width: 390px;
      height: 505px;
    }
    .main-r {
      width: 520px;
      height: 505px;
      padding: 50px 60px 0 55px;
      box-sizing: border-box;
      .form-login {
        margin-top: 30px;
      }
      .login-code {
        width: 90px;
        background: rgda(0, 0, 0, 0.6);
      }
    }
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  width: 100%;
  min-height: calc(100vh);
  background: url("../../assets/image/l-bge.png") center no-repeat;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }

  .thirdparty-button {
    position: absolute;
    right: 0;
    bottom: 6px;
  }

  @media only screen and (max- 470px) {
    .thirdparty-button {
      display: none;
    }
  }
}
</style>
<style lang="scss">
.form-login .el-input-group__append {
  background: rgba(0, 0, 0, 0.3);
  padding: 0;
  left: 260px;
  bottom: 44px;
}
</style>

转自：https://blog.csdn.net/LONGLONGAGO_RU/article/details/103908405

在需要使用的项目文件中引入： import md5 from 'js-md5'; 使用： md5('mima')//612341288a285f5b188163482320e88f