Question

在构建项目时，控制台显示源包已编译（px10包内的包）

但是，如果我看到生成的目标文件，那么源包中没有任何类。

多次尝试clean & build但没有帮助
清除了.../var/cache/

以下是构建Web应用程序时生成的日志

------------------------------------------------------------------------
Building ABCApp Java EE 6 Webapp 1.0
------------------------------------------------------------------------

[antrun:run]
Executing tasks
Executed tasks

[resources:resources]
Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
Copying 13 resources

[compiler:compile]
File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent!
Compiling 81 source files to C:\dev\ABCApp\target\classes
px10/BusinessLayer/LOBERs/connect.java:[248,38] ';' expected
px10/BusinessLayer/User/User_2.java:[127,52] '.class' expected

[resources:testResources]
Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
Copying 1 resource

[compiler:testCompile]
Nothing to compile - all classes are up to date

[surefire:test]
Surefire report directory: C:\dev\ABCApp\target\surefire-reports

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
There are no tests to run.

Results :

Tests run: 0, Failures: 0, Errors: 0, Skipped: 0


[war:war]
Packaging webapp
Assembling webapp [ABCApp] in [C:\dev\ABCApp\target\ABCApp]
Processing war project
Copying webapp resources [C:\dev\ABCApp\src\main\webapp]
Webapp assembled in [1841 msecs]
Building war: C:\dev\ABCApp\target\ABCApp.war
Warning: selected war files include a WEB-INF/web.xml which will be ignored 
(webxml attribute is missing from war task, or ignoreWebxml attribute is specified as 'true')

[install:install]
Installing C:\dev\ABCApp\target\ABCApp.war to C:\dev\mavenRepository\w93\ABCApp\1.0\ABCApp-1.0.war
Installing C:\dev\ABCApp\pom.xml to C:\dev\mavenRepository\w93\ABCApp\1.0\ABCApp-1.0.pom
------------------------------------------------------------------------
BUILD SUCCESS
------------------------------------------------------------------------
Total time: 9.053s
Finished at: Tue Oct 04 11:49:46 IST 2011
Final Memory: 6M/15M
------------------------------------------------------------------------

由于我从{I}文件夹中删除了一个名为classes的文件夹，这个问题似乎就出现了。

以下是项目的有效POM：

web-inf

Answer 1

我发现问题是由于源包中的一些不可编译的类，因为没有类被复制到/target/classes/文件夹。在删除无法编译的源代码时，我发现它工作正常。

Answer 2

maven不会将生成的内容放在src/main/webapp/WEB-INF/classes文件夹中。

默认情况下（以及上面的pom片段），它将已编译的类放在target/classes文件夹中。如果是war项目，maven war plugin会将类复制到webapp中的WEB-INF/classes文件夹。

因此，在您的情况下，请检查以下文件夹：

C：\ dev的\ ABCApp \目标\类
C：\ dev的\ ABCApp \目标\ ABCApp \ WEB-INF \类

Answer 3

某些版本的maven-compiler-plugin

也会出现这种情况

以下修复程序为我解决了问题，maven现在可以正确报告编译器错误。使用下面的注释版本，尽管代码无法编译，maven仍会成功构建。

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.0</version>
    <!--This version will happily build successfully when the code fails to compile-->
    <!--<version>3.1</version>-->
</plugin>

Answer 4

如果在使用Spring Boot应用程序构建Maven项目的代码时未在classes文件夹中创建包。某些版本的maven-compiler-plugin

也会发生这种情况

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.0</version>
    <!--This version will happily build successfully when the code fails to compile-->
    <!--<version>3.1</version>-->
          <configuration>
                <!--<skipMain>true</skipMain>-->
                <skip>true</skip>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
</plugin>

生成后生成的目标文件不包含必须存在的所有已编译类

4 个答案: