创建Maven web工程

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第一步，启动Eclipse，依次打开菜单【File】【New】【Other】

找到目录Maven，选择Maven Project，

选择一个Archetype。这里创建Web工程，选择maven-archetype-webapp

输入id

将生成一个maven项目。项目的图标左上角有一个m字母

解决问题

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创建后，报几个问题。

这样解决，打开pom.xml，添加以下东东。

1、添加插件

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<plugin>     <groupId>org.apache.maven.plugins</groupId>     <artifactId>maven-war-plugin</artifactId>     <version>2.6</version>     <configuration>         <failOnMissingWebXml>false</failOnMissingWebXml>     </configuration> </plugin> <plugin>     <groupId>org.apache.maven.plugins</groupId>     <artifactId>maven-compiler-plugin</artifactId>     <version>3.1</version>     <configuration>         <source>1.8</source>         <target>1.8</target>     </configuration> </plugin

2、添加serlvet依赖

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<dependency>     <groupId>javax.servlet</groupId>     <artifactId>javax.servlet-api</artifactId>     <version>3.1.0</version> </dependency> <dependency>     <groupId>javax.servlet.jsp</groupId>     <artifactId>javax.servlet.jsp-api</artifactId>     <version>2.3.1</version> </dependency> <dependency>     <groupId>javax.servlet</groupId>     <artifactId>jstl</artifactId>     <version>1.2</version> </dependency>

完整的pom.xml

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<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/maven-v4_0_0.xsd">     <modelVersion>4.0.0</modelVersion>     <groupId>com.liyongzhen</groupId>     <artifactId>myweb</artifactId>     <packaging>war</packaging>     <version>0.0.1-SNAPSHOT</version>     <name>myweb Maven Webapp</name>     <url>http://maven.apache.org</url>     <dependencies>         <dependency>             <groupId>javax.servlet</groupId>             <artifactId>javax.servlet-api</artifactId>             <version>3.1.0</version>         </dependency>         <dependency>             <groupId>javax.servlet.jsp</groupId>             <artifactId>javax.servlet.jsp-api</artifactId>             <version>2.3.1</version>         </dependency>         <dependency>             <groupId>javax.servlet</groupId>             <artifactId>jstl</artifactId>             <version>1.2</version>         </dependency>         <dependency>             <groupId>junit</groupId>             <artifactId>junit</artifactId>             <version>3.8.1</version>             <scope>test</scope>         </dependency>     </dependencies>     <build>         <finalName>myweb</finalName>         <plugins>             <plugin>                 <groupId>org.apache.maven.plugins</groupId>                 <artifactId>maven-war-plugin</artifactId>                 <version>2.6</version>                 <configuration>                     <failOnMissingWebXml>false</failOnMissingWebXml>                 </configuration>             </plugin>             <plugin>                 <groupId>org.apache.maven.plugins</groupId>                 <artifactId>maven-compiler-plugin</artifactId>                 <version>3.1</version>                 <configuration>                     <source>1.8</source>                     <target>1.8</target>                 </configuration>             </plugin>         </plugins>     </build> </project>

调整Servlet版本

当前主流Servlet开发或者说主流Java Web开发，Servlet的版本是3.1。(Servlet 4.0还未被大量采用)。

我们在添加依赖时，Servlet版本也是3.1，而maven工程创建时Servlet是2.3

右击工程名，在弹出的菜单中选择【Properties】

弹出对话框，选择【Project Facets】

找到 Dynamice Web Module，去掉前面勾选

将Serlvet版本更改为3.1，再点击【Apply】

最后点击【Apply and Close】

再看，更新过来。