add:增加语言包依赖

nladmin-ui/src/views/login.vue

@@ -28,7 +28,7 @@
           </el-checkbox>
         </el-col>
         <el-col :span="12">
-          <el-dropdown style="display: flex; justify-content: right; color: #409EFF;" trigger="click" @command="langChange">
+          <el-dropdown style="display: flex; justify-content: right; color: #409EFF;" trigger="click" @command="changeLanguage">
             <span class="el-dropdown-link">
               {{ language }}
             </span>
@@ -108,6 +108,18 @@ export default {
   },
   methods: {
     // 中英文切换
+    // 语言切换-x
+    async changeLanguage(locale) {
+      // 如果已经加载过该语言，可以直接设置，避免重复请求
+      if (!this.$i18n.getLocaleMessage(locale)) {
+        const messages = await fetchMessages(locale)
+        this.$i18n.setLocaleMessage(locale, messages)
+      }
+      this.$i18n.locale = locale
+      // 可以将当前语言保存到本地存储，以便下次使用
+      localStorage.setItem('lang', locale)
+      this.setLang(locale)
+    },
     langChange(command) {
       this.$i18n.locale = command
       localStorage.setItem('lang', command)