我们用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,而一般现在至少都是2.5,在Project Facets里面修改Dynamic web module为2.5的时候就会出现Cannot change version of project facet Dynamic web module to 2.5,如图:
其实在右边可以看到改到2.5需要的条件以及有冲突的facets,解决这个问题的步骤如下:
1.把Servlet改成2.5,打开项目的web.xml,改之前:
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<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
< web-app >
< display-name > Archetype Created Web Application </ display-name >
</ web-app >
改后:
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<? xml version = "1.0" encoding = "UTF-8" ?>
< web-app version = "2.5"
xmlns = "http://java.sun.com/xml/ns/javaee"
xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation ="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
< display-name > Archetype Created Web Application </ display-name >
</ web-app >
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
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eclipse.preferences.version = 1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode = enabled
org.eclipse.jdt.core.compiler.codegen.targetPlatform = 1 .5
org.eclipse.jdt.core.compiler.compliance = 1 .5
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 .5
把1.5改成1.6
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eclipse.preferences.version = 1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode = enabled
org.eclipse.jdt.core.compiler.codegen.targetPlatform = 1 .6
org.eclipse.jdt.core.compiler.compliance = 1 .6
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 .6
打开org.eclipse.wst.common.component
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<? xml version = "1.0" encoding = "UTF-8" ?>
< project-modules id = "moduleCoreId" project-version = "1.5.0" >
< wb-module deploy-name = "test" >
< 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" />
< property name = "context-root" value = "test" />
< property name = "java-output-path" value = "/test/target/classes" />
</ wb-module >
</ project-modules >
把
project-version="1.5.0"改成
project-version="1.6.0"
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<? xml version = "1.0" encoding = "UTF-8" ?>
< project-modules id = "moduleCoreId" project-version = "1.6.0" >
< wb-module deploy-name = "test" >
< 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" />
< property name = "context-root" value = "test" />
< property name = "java-output-path" value = "/test/target/classes" />
</ wb-module >
</ project-modules >
打开org.eclipse.wst.common.project.facet.core.xml
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<? xml version = "1.0" encoding = "UTF-8" ?>
< faceted-project >
< fixed facet = "wst.jsdt.web" />
< installed facet = "java" version = "1.5" />
< installed facet = "jst.web" version = "2.3" />
< installed facet = "wst.jsdt.web" version = "1.0" />
</ faceted-project >
把<installed facet="java" version="1.5"/>改成<installed facet="java" version="1.6"/>,把 <installed facet="jst.web" version="2.3"/>改成 <installed facet="jst.web" version="2.5"/>
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<? xml version = "1.0" encoding = "UTF-8" ?>
< faceted-project >
< fixed facet = "wst.jsdt.web" />
< installed facet = "java" version = "1.6" />
< installed facet = "jst.web" version = "2.5" />
< installed facet = "wst.jsdt.web" version = "1.0" />
</ faceted-project >
都改好之后在打开看看,已经把Dynamic web module改成了2.5
好了,大功搞成,这是一种解决办法,但是治标不治本,更高级的就是自定义catalog,然后安装到本地,再创建的时候啥都有了,比如把现在流行的s(struts2)sh,ssi,s(springmvc)sh 创建catalog,包括包结构,部分代码啥的都有,下次写吧。
转载来自于:http://blog.csdn.net/steveguoshao/article/details/38414145