Cannot change version of project facet Dynamic web
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转自:http://my.oschina.net/cloudcoder/blog/362949
摘要
解决Cannot change version of project facet Dynamic web module to 3.0
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=1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
org.eclipse.jdt.core.compiler.compliance=1.7
org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
org.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>
在按照上述方法操作后提示新的错误:“Dynamic Web Module 3.0 requires Java 1.6 or newer”
在pom.xml文件中添加以下代码后,更新maven后正常;
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
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