类型javax.servlet.ServletContext和javax.servlet.ServletException无法解析

我正在尝试将 Spring Security包含在我的Web项目中,我正在关注本教程 http://docs.spring.io/spring-security/site/docs/current/guides/html5//helloworld.html

我已经在教程中完成了给定的maven项目,并且工作正常.但是当我试图将它包含在我的项目中时,会出现编译错误.具体来说,当我从AbstractSecurityWebApplicationInitializer扩展出现给定的错误

Multiple markers at this line

The type javax.servlet.ServletContext cannot be resolved. It is indirectly referenced from required .class files

The type javax.servlet.ServletException cannot be resolved. It is indirectly referenced from required .class files

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>spring.primefaces</groupId>
<artifactId>primefaces.testwebapp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>SpringPrimefacesWebApp</name>
<build>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>
        <plugin>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.3</version>
            <configuration>
                <failOnMissingWebXml>false</failOnMissingWebXml>
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <!-- JSF 2.2 core and implementation -->
    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-api</artifactId>
        <version>2.2.11</version>
    </dependency>
    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-impl</artifactId>
        <version>2.2.11</version>
    </dependency>
    <!-- Prime Faces -->
    <dependency>
        <groupId>org.primefaces</groupId>
        <artifactId>primefaces</artifactId>
        <version>5.2</version>
    </dependency>
    <!-- Spring security -->
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-web</artifactId>
        <version>4.0.1.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-config</artifactId>
        <version>4.0.1.RELEASE</version>
    </dependency>
</dependencies>
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-framework-bom</artifactId>
            <version>4.1.6.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

谢谢您的帮助！

使用mvn clean install -U

解决方法

只需将 javax.servlet API 添加到编译时依赖关系.您不需要将其包含在构建中,它已经由目标servlet容器提供.

您当前的pom表示您正在部署到准系统servlet容器(Tomcat,Jetty等),而不是完整的Java EE应用程序服务器(WildFly,TomEE,GlassFish,Liberty等),否则您将遇到类加载通过提供JSF与webapp而不是使用容器提供的方法来解决问题.

在这种情况下,添加以下依赖关系应该适用于像Tomcat 8这样的Servlet 3.1容器：

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>

或者,如果您实际上是针对较旧的Servlet 3.0容器(如Tomcat 7),请更改< version>到3.0.1(注意：没有3.0,由于他们身边的错误).

如果您碰巧实际部署到像WildFly 8这样的Java EE 7应用服务器,请改用下面的依赖关系.它涵盖整个Java EE API,包括javax.servlet(和javax.faces,所以你会删除那些单独的JSF API / impl依赖项)：

<dependency>
    <groupId>javax</groupId>
    <artifactId>javaee-api</artifactId>
    <version>7.0</version>
    <scope>provided</scope>
</dependency>

此外,如果您要定位较早的Java EE 6应用服务器(如JBoss AS 7),请更改< version>至6.0.

原文链接：https://www.f2er.com/java/123086.html

类型javax.servlet.ServletContext和javax.servlet.ServletException无法解析

解决方法

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