项目报错“JavaServer Faces 2.2 can not be installed : One or more constraints”等一系列问题

在做springmvc+maven项目时,经常遇到如下错误:

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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转载自blog.csdn.net/qq_24215677/article/details/81334093