Idea操作
1.打開(kāi)配置界面,菜單欄File>Setting>Build>build Tools>Maven>Runner,或者快捷鍵Ctrl+Shift+S

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2.勾選Delegate IDE build/run actions to Maven

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3.File > invalidate Caches/Restart

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4.選擇Invalidate and Restart

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5.如果還是報(bào)紅色,請(qǐng)先將POM中引用的Jar包注釋掉,刷新Maven后再重新引用