Cannot change version of project facet Dynamic web module to 3.0

川长思鸟来 2022-02-24 02:50 167阅读 0赞

报错：Cannot change version of project facet Dynamic web module to 3.0

原因：之前构建项目用的catalog的servlet是2.3,所以会报错。

解决办法：

1.修改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">

注意，这里可能修改后，web.xml会报错。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L01ySGFtc3Rlcg_size_16_color_FFFFFF_t_70]  
没有关系，你可以直接把xml头全部删掉，就不会报错，或者直接让他报错，也并不影响项目的启动  
2.修改.setting目录下的org.eclipse.jdt.core.prefs

eclipse.preferences.version=1
    org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
    org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
    org.eclipse.jdt.core.compiler.compliance=1.8
    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=1.8

3.修改org.eclipse.wst.common.project.facet.core.xml

<?xml version="1.0" encoding="UTF-8"?>
    <faceted-project>
    	<fixed facet="wst.jsdt.web" />
    	<installed facet="java" version="1.8" />
    	<installed facet="jst.web" version="3.0" />
    	<installed facet="wst.jsdt.web" version="1.0" />
    </faceted-project>

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L01ySGFtc3Rlcg_size_16_color_FFFFFF_t_70]: /images/20220224/b129074af3634470920108b2d2f4260b.png