1.新建Maven项目后再pom.xml配置servlet_api包
<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.zhang</groupId>
<artifactId>struts2</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>struts2 Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>struts2</finalName>
</build>
</project>
2.然后进web.xml里面把类容改成你要改的版本的
修改前
我这里是改成4.0版本的
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
id="WebApp_ID" version="4.0">
</web-app>
3.修改jre版本:改成1.8
4.然后右键项目进入properties然后找到Project Facets
ba
把java的版本1.5改为1.8
然后把Dynamic Web Module 的√去掉然后改为4.0版本然后点Apply
然后把Dynamic Web Module 的√勾上
然后点中间这个框下面这条英文 Further conFiguration acailable
点ok然后应用就修改成功了