Cannot change version of project facet Dynamic web 3.0
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问题描述
用Eclipse创建Maven结构的web项目的时候选择了Artifact Id为maven-artchetype-webapp,由于这个catalog比较老,用的servlet还是2.3的,而一般现在都是用3.0,在Project Facets里面修改Dynamic web module为3.0的时候就会出现Cannot change version of project facet Dynamic web module to 3.0,如图:
其实在右边可以看到改到3.0需要的条件以及有冲突的facets,4
解决这个问题的步骤如下:
1.把Servlet改成3.0,打开项目的web.xml
<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="schedule-console" version="3.0">
2修改项目的设置,在Navigator下打开项目.settings目录下的org.eclipse.jdt.core.prefs
把1.5改成1.7
eclipse.preferences.version=1org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabledorg.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7org.eclipse.jdt.core.compiler.compliance=1.7org.eclipse.jdt.core.compiler.problem.assertIdentifier=errororg.eclipse.jdt.core.compiler.problem.enumIdentifier=errororg.eclipse.jdt.core.compiler.problem.forbiddenReference=warningorg.eclipse.jdt.core.compiler.source=1.7
3. 打开org.eclipse.wst.common.component
本文件不用修改
<?xml version="1.0" encoding="UTF-8"?><project-modules id="moduleCoreId" project-version="1.5.0"> <wb-module deploy-name="xband-schedule-console"> <wb-resource deploy-path="/" source-path="/target/m2e-wtp/web-resources"/> <wb-resource deploy-path="/" source-path="/src/main/webapp" tag="defaultRootSource"/> <wb-resource deploy-path="/WEB-INF/classes" source-path="/src/main/java"/> <wb-resource deploy-path="/WEB-INF/classes" source-path="/src/main/resources"/> <dependent-module archiveName="xband-schedule-core-1.0-SNAPSHOT.jar" deploy-path="/WEB-INF/lib" handle="module:/resource/xband-schedule-core/xband-schedule-core"> <dependency-type>uses</dependency-type> </dependent-module> <property name="java-output-path" value="/xband-schedule-console/target/classes"/> <property name="context-root" value="schedule-console"/> </wb-module></project-modules>
4. 打开org.eclipse.wst.common.project.facet.core.xml
把1.5改成1.7
<?xml version="1.0" encoding="UTF-8"?><faceted-project> <fixed facet="wst.jsdt.web"/> <installed facet="jst.web" version="3.0"/> <installed facet="wst.jsdt.web" version="1.0"/> <installed facet="java" version="1.7"/></faceted-project>
最后的效果如图:
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