Java缺少javax.servlet.httpservlet

Question

當我在Eclipse中使用webapp原型創建新的Maven項目並根據pom.xml文件導入所有jar時，我在所有.jsp文件上都出現了紅叉，並說“找不到超類“ javax.servlet.http.HttpServlet”在Java構建路徑上。

我添加了javax.servlet依賴項，它根本沒有幫助。

關於如何解決它的任何想法？ 不能因為我以前的任何Maven項目而導致Eclipse造成這種情況嗎？

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>SpringHiberSql</groupId>
<artifactId>SpringHiberSql</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<properties>
<org.springframework.version>5.0.0.RELEASE</org.springframework.version>        
</properties>

<dependencies>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>${org.springframework.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>${org.springframework.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${org.springframework.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>${org.springframework.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>${org.springframework.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>${org.springframework.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-orm</artifactId>
    <version>${org.springframework.version}</version>
</dependency>

<!-- Hibernate resources -->
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>3.6.7.Final</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>4.3.0.Final</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-commons-annotations</artifactId>
    <version>3.3.0.ga</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-annotations</artifactId>
    <version>3.3.1.GA</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>3.3.2.GA</version>
</dependency>
<dependency>
    <groupId>taglibs</groupId>
    <artifactId>standard</artifactId>
    <version>1.1.2</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.1.2</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.0.1</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>commons-dbcp</groupId>
    <artifactId>commons-dbcp</artifactId>
    <version>20030825.184428</version>
</dependency>
<dependency>
    <groupId>commons-pool</groupId>
    <artifactId>commons-pool</artifactId>
    <version>20030825.183949</version>
</dependency>
<!-- MySQL -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.6</version>
</dependency>
<!-- Log4j -->
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.14</version>
    <type>jar</type>
    <scope>compile</scope>
 </dependency>
 </dependencies>


 <build>
 <testSourceDirectory>src/main/test</testSourceDirectory>
 <resources>
  <resource>
    <directory>src/main/resources</directory>
    <excludes>
      <exclude>**/*.java</exclude>
    </excludes>
  </resource>
  <resource>
    <directory>src/main/webapp</directory>
    <excludes>
      <exclude>**/*.java</exclude>
    </excludes>
  </resource>
</resources>
<plugins>
  <plugin>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>2.3.2</version>
    <configuration>
      <source>1.7</source>
      <target>1.7</target>
    </configuration>
  </plugin>
</plugins>
</build>
</project>

Answer 1

我在所有.jsp文件上都打了紅叉，說“在Java構建路徑中找不到超類“ javax.servlet.http.HttpServlet”。

您的Maven pom對於這種依賴關系似乎還可以。
問題很可能來自Eclipse。
如果成功使用mvn clean package打包應用程序，您將了解罪魁禍首：Eclipse。
理想情況下，應在沒有任何IDE包裝的情況下使用此maven命令，因此應從命令行使用。
這樣可以防止IDE產生任何副作用。