解决maven项目Cannot change version of project facet Dynamic web module to 3.0/3.1

时间：2023-03-08 20:14:55

解决maven项目Cannot change version of project facet Dynamic web module to 3.0

1.打开项目所在目录下的.settings文件夹

打开org.eclipse.wst.common.project.facet.core.xml

把<installed facet="java" version="1.5"/>改成<installed facet="java" version="1.8"/>，把  <installed facet="jst.web" version="2.3"/>改成  <installed facet="jst.web" version="3.0"/>

<?xml version="1.0" encoding="UTF-8"?>

<faceted-project>

  <fixed facet="wst.jsdt.web"/>

  <installed facet="java" version="1.8"/>

  <installed facet="jst.web" version="3.0"/>

  <installed facet="wst.jsdt.web" version="1.0"/>

</faceted-project>

　　

2.在pom.xml中增加

<!-- define the project compile level -->

         <plugin>

            <groupId>org.apache.maven.plugins</groupId>

            <artifactId>maven-compiler-plugin</artifactId>

            <configuration>

                <source>1.8</source>

                <target>1.8</target>

            </configuration>

        </plugin>

　　

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