项目报错“JavaServer Faces 2.2 can not be installed : One or more constraints”等一系列问题
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解决办法(这里以jdk1.8,web3.0为例):
一:保证build path的jre版本
remove掉旧版本的,add新版本
二:保证java complier版本和前面的一致
三:更改maven pom.xml文件
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<
build
>
<
plugins
>
<
plugin
>
<
groupId
>org.apache.maven.plugins</
groupId
>
<
artifactId
>maven-compiler-plugin</
artifactId
>
<
version
>3.0</
version
>
<
configuration
>
<
source
>1.8</
source
>
<
target
>1.8</
target
>
</
configuration
>
</
plugin
>
</
plugins
>
</
build
>
四:修改project facets
五:修改org.eclipse.wst.common.project.facet.core.xml文件
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<?
xml
version="1.0" encoding="UTF-8"?>
<
faceted-project
>
<
fixed
facet="wst.jsdt.web"/>
<
installed
facet="wst.jsdt.web" version="1.0"/>
<
installed
facet="java" version="1.8"/>
<
installed
facet="jst.jaxrs" version="2.0"/>
<
installed
facet="jst.web" version="3.0"/>
<
installed
facet="jst.jsf" version="2.2"/>
</
faceted-project
>
六:修改web.xml
更改头部声明如下:
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<?
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"
xmlns:web= "http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id= "WebApp_ID"
version ="3.0">
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