版权声明:by DongBao https://blog.csdn.net/aaaadong/article/details/80757301
解决方向1:
idea没有添加web的关联属性
解决方向2:
idea pom文件引用缺失(例如常见的三个引用)
<!-- servlet 依赖包 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<scope>provided</scope>
</dependency>
<!-- servlet 依赖包 -->
<!-- JSTL (JSP standard Tag Library) JSP 标准标签库 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<!-- JSTL (JSP standard Tag Library) JSP 标准标签库 -->
<!-- Tomcat的支持 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<!-- Tomcat的支持 -->
<!-- jsp依赖jar包start -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
</dependency>
<!-- jsp依赖jar包end -->
解决方向3:
如果还是404,就应该是编译问题了,强制添加resource,在pom文件中
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
<!-- jsp 404解决 -->
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.*</include>
</includes>
</resource>
<!-- 打包时将jsp文件拷贝到META-INF目录下 -->
<resource>
<!-- 指定resources插件处理哪个目录下的资源文件 -->
<directory>src/main/webapp</directory>
<!--注意此次必须要放在此目录下才能被访问到 -->
<targetPath>META-INF/resources</targetPath>
<includes>
<include>**/*.*</include>
</includes>
</resource>
</resources>
<!-- jsp 404解决 -->
</build>
三种都用了如果还没有解决只能重启程序了...
eclipse同理