IntelliJ IDEA 新建项目

一 新建一个Java项目

 

二 新建一个Web项目

 

三 新建一个Maven项目

 

四 web.xml常见版本

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<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"          version="2.5">   </web-app>

 

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<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"          version="3.0">   </web-app>

　　

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<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"          version="3.1">   </web-app>

　　

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<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"          version="4.0">   </web-app>

　　

五 pom.xml纯净版

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<?xml version="1.0" encoding="UTF-8"?> <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>com.hy.demo</groupId>     <artifactId>demo-maven</artifactId>     <version>1.0-SNAPSHOT</version>     <!-- 指定打包方式 -->     <packaging>war</packaging>       <build>         <plugins>             <!-- 指定编译版本 -->             <plugin>                 <groupId>org.apache.maven.plugins</groupId>                 <artifactId>maven-compiler-plugin</artifactId>                 <version>3.5.1</version>                 <configuration>                     <encoding>UTF-8</encoding>                     <source>1.8</source>                     <target>1.8</target>                 </configuration>             </plugin>               <!-- Tomcat7 -->             <plugin>                 <groupId>org.apache.tomcat.maven</groupId>                 <artifactId>tomcat7-maven-plugin</artifactId>                 <version>2.2</version>                 <configuration>                     <uriEncoding>UTF-8</uriEncoding>                     <port>8080</port>                     <path>/app</path>                 </configuration>             </plugin>         </plugins>     </build> </project>