Maven框SocialConfigurerAdapter.class缺失

 1.配置如下圖所示環境配置 如果出現：No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK時使用2.沒有可適當忽略2和3.  2、eclipse菜單 - Window - Preferences- Java - Installed JREs 將配置的JRE定位

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