可视化系统改造的坑（笔记）

后端

问题：
Description Resource Path Location Type
The type javax.annotation.Nullable cannot be resolved. It is indirectly referenced from required .class files AdminController.java /DBoard/src/main/java/com/dt/board/controller line 1 Java Problem

原因及解决
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>18.0</version>
</dependency>

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Open the Java build path property page of project ‘DBoard’


这里是引用

<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>23.6-jre</version>
</dependency>

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npm install -g yarn
yarn install
yarn run serve

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//坑区别
response.setContentType("application/json;charset=UTF-8");

response.setContentType("text/plain;charset=utf-8");