JSP頁面pageContext.getRequest()報紅

ServletRequest req = pageContext.getRequest();

一、在pom中添加jsp-api依賴java

<!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api -->
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>javax.servlet.jsp-api</artifactId>
      <version>2.3.3</version>
      <scope>provided</scope>
    </dependency>

二、在每一個jsp頁面添加<%@page isELIgnored="false"%>api

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