打war包报错

先是出现错误让update maven然后更新之后jre就变回1.5了，然后又重新把两个都设置成1.8，还是报错

慕村9139682 2020-05-17

源自：Maven入门 2-2 Web应用打包

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好帮手慕小脸回答被采纳获得+3积分 2020-05-17 19:27:48

同学你好，Dynamic Web Module 3.1 requires Java 1.7 or newer

首先需要检查和确认Eclipse项目属性的java版本和本地jdk的版本一致，以1.7版本为例：

1. 在 Java Build Path的libraries中修改对应的JDK版本为1.7；

2.在Java Compiler 中修改对应的JDK版本为1.7；

3.在Project Facet中修改对应的JDK版本为1.7；

4.如果以上修改后还是报错。是因为使用了 maven构建，所以最好在pom.xml文件中的build标签的plugins部分，加入以下代码：

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.1</version>
    <configuration>
        <source>1.7</source>
        <target>1.7</target>
    </configuration>
</plugin>

5. 最后记得：因为修改了pom.xml，所以需要对项目进行Maven Update.

祝学习愉快~

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慕村9139682 提问者 #1

老师，工程不报错了，但是运行插件还是错误：[INFO] Copying webapp resources [D:\eclipse-workspace\maven\src\main\webapp] [INFO] Webapp assembled in [336 msecs] [INFO] Building war: D:\eclipse-workspace\maven\target\maven-1.0.0-RELEASE.war [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.454 s [INFO] Finished at: 2020-05-17T19:44:43+08:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:3.2.3:war (default-war) on project maven: Error assembling WAR: webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode) -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

2020-05-17 19:48:13
慕村9139682 提问者 #2

好了老师，问题解决了~~谢谢！

2020-05-17 19:53:57