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Maven Java EE Configuration

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南方客
南方客 2020-12-08 11:30

In my maven project, I have this Effective POM:
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12条回答
  • 南旧
    2020-12-08 11:51

    After following above troubleshooting steps. Update your maven project.

    Right click on your project--> Maven--> Update Project

    Or simply Alt+f5.

    Hope this might help someone.

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  • 深忆病人
    2020-12-08 11:53
    1. Go to project Build Path and change the Java Library version to 1.7
    2. Go to Eclipse Preferences -> Java -> Compiler -> Change compliance level to 1.7
    3. Right click on project -> Properties -> Project Facets
    4. Uncheck Dynamic Web Module and click Apply (also uncheck JavaServer Faces if you had that)
    5. Change the Java facet version to 1.7 and click Apply
    6. Add the Dyanmic Web Module v3.0, apply.

    Eclipse's facets configuration is buggy. Make sure you keep hitting Apply between checking and unchecking of facets.

    Links:

  • Cannot change version of project facet Dynamic Web Module to 3.0?
  • Change version of project facet Dynamic Web Module to 2.5

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  • 星月不相逢
    2020-12-08 11:56

    This works for me:

    <build>
    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.3</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <warSourceDirectory>src/main/webapp</warSourceDirectory>
                    <warName>mfp</warName>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </pluginManagement>
    <finalName>myprojectname</finalName>
</build>
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  • 借酒劲吻你
    2020-12-08 11:57

    I had to reset maven settings in Window->Preferences->Maven-> User Settings to "C:\Development\apache-maven-3.5.3\conf\settings.xml".

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  • 陌清茗
    2020-12-08 12:02

    Changed version to 3.1 and the tags and to 1.7 

     <plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
     <source>1.7</source> 
     <target>1.7</target> 
</configuration>

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  • 面向向阳花
    2020-12-08 12:04

    I am using java 1.8. Fixed doing the following.

    Remove from pom:

    <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.5.1</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>

    It will complain that pom is not up to date. Used quick fix to update then you get a whole bunch of errors.

    RE-ADD to pom:

    <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.5.1</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>

    Updated maven and all errors are cleared.

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