vue 配置 i18n 多语言

1、安装 i18n 模块

vue-i18n与vue存在版本兼容性问题，vue2.x需要使用 8.9.0以下版本的vue-i18n，我们这里用的vue 2.6.10，配合vue-i18n 8.2.1版本使用

安装vue-i18n
npm install vue-i18n@8.2.1 --save

2、在src下创建lang目录及对应语言目录

3、配置src/lang/index.js

import Vue from 'vue'
import VueI18n from 'vue-i18n'
import elementEnLocale from 'element-ui/lib/locale/lang/en'
import elementZhLocale from 'element-ui/lib/locale/lang/zh-CN'
import elementJaLocale from 'element-ui/lib/locale/lang/ja'
import locale from 'element-ui/lib/locale'
import enLocale from './en'
import zhLocale from './zh'
import jaLocale from './ja'

Vue.use(VueI18n)

// 引入本地包
const messages = {
  zh: {
    ...zhLocale,
    ...elementZhLocale
  },
  en: {
    ...enLocale,
    ...elementEnLocale
  },
  ja: {
    ...jaLocale,
    ...elementJaLocale
  }
}

// 创建国际化实例
const i18n = new VueI18n({
  locale: window.sessionStorage.getItem('lang') || 'zh',
  messages
})

locale.i18n((key, value) => i18n.t(key, value))

export default i18n

zh.js文件

// module.exports = {
export default {
  userManager: {
    addBtn: '添加',
    searchPlacholder: '请输入账号、姓名、工号',
    searchBtn: '查询',
    account: '账号',
    username: '姓名',
    departmentFullPath: '部门全称',
    positionName: '岗位名称',
    status: '状态',
    operate: '操作'
  }
}

en.js文件

// module.exports = {
export default {
  userManager: {
    addBtn: 'Add',
    searchPlacholder: 'Please input your account, your name or your employee number to search',
    searchBtn: 'Search',
    account: 'Account',
    username: 'Username',
    departmentFullPath: 'DepartmentFullPath',
    positionName: 'PositionName',
    status: 'Status',
    operate: 'Operate'
  }
}

ja.js文件

// module.exports = {
export default {
  userManager: {
    addBtn: '新着',
    searchPlacholder: 'アカウント番号、名前、ジョブ番号を入力してください',
    searchBtn: 'お問い合わせ',
    account: 'アカウント',
    username: 'ユーザー名',
    departmentFullPath: '部門の氏名',
    positionName: '役職名',
    status: '州',
    operate: '操作する'
  }
}

4、在main.js中引入i18n

main.js

import i18n from './lang'

new Vue({
  el: '#app',
  i18n,
  router,
  store,
  render: h => h(App)
})

5、封装组件，用来切换语言

<template>
  <el-dropdown class="lang-container hover-pointer" trigger="click">
    <span>{{ language }} <i class="el-icon-caret-bottom el-icon--right" />
    </span>
    <el-dropdown-menu slot="dropdown">
      <el-dropdown-item @click.native="changeLangauge('zh')">
        <span style="display:block;">简体中文</span>
      </el-dropdown-item>
      <el-dropdown-item @click.native="changeLangauge('en')">
        <span style="display:block;">English</span>
      </el-dropdown-item>
      <el-dropdown-item @click.native="changeLangauge('ja')">
        <span style="display:block;">日本语</span>
      </el-dropdown-item>
    </el-dropdown-menu>
  </el-dropdown>
</template>
<script>
export default {
  data() {
    return {
      language: ''
    }
  },
  created() {
    this.showLangauge()
  },
  methods: {
    showLangauge() {
      const currentLang = window.sessionStorage.getItem('lang') || 'zh'
      switch (currentLang) {
        case 'zh':
          this.language = '简体中文'
          break
        case 'en':
          this.language = 'English'
          break
        case 'ja':
          this.language = '日本语'
      }
    },
    changeLangauge(lang) {
      this.$i18n.locale = lang
      window.sessionStorage.setItem('lang', lang)
      window.location.reload()
    }
  }
}
</script>
<style lang="scss">
.hover-pointer {
  span {
    cursor: pointer
  }
}
</style>

5、在vue文件中使用

vue代码使用$t获取国际化
普通文本使用方式： {{ $t('m.fm.components.fields.input') }}

标签内使用方式： :placeholder="$t('m.fm.components.fields.input')"

js内使用方式: this.$t('m.fm.components.fields.input')

<template>
  <div class="login-container">
    <language class="lanuage-component" />
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">
      <div class="title-container">
        <h3 class="title">{{ $t('login.loginTitle') }}</h3>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          :placeholder="$t('login.username')"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          :placeholder="$t('login.password')"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">{{ $t('login.loginBtn') }}</el-button>

      <div class="tips">
        <span style="margin-right:20px;">username: admin</span>
        <span> password: any</span>
      </div>

    </el-form>
  </div>
</template>

<script>

export default {
  name: 'Login',
  data() {
    const validateUsername = (rule, value, callback) => {
      if (value.length < 2) {
        callback(new Error(this.$t('login.usernameError')))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error(this.$t('login.passwordError')))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: '',
        password: ''
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm).then(() => {
            this.$router.push({ path: this.redirect || '/' })
            this.loading = false
          }).catch(() => {
            this.loading = false
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</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;
  }
}
</style>

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

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .lanuage-component {
    position: fixed;
    top: 20px;
    right: 100px;
    color: #fff;
  }
  .login-form  {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    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;
  }
}
</style>

切换语言后，name字段的现实就根据切换的语言显示