Maven上的编译错误

Question

正在从事Maven项目。 我正在尝试使用Maven进行构建，但出现以下错误！ 我正在使用JDK 8进行eclipse。

无法执行目标org.apache.maven.plugins：maven-compiler-plugin：2.3.2：compile（默认编译）

我也尝试了上述解决方案，但仍然出现错误！

[INFO] Scanning for projects...
[INFO] 
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building RESTfulWebServiceExample 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ RESTfulWebServiceExample ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory D:\Tomcat 7.0\webapps\RESTfulWebServiceExample\src\main\resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ RESTfulWebServiceExample ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent!
[INFO] Compiling 1 source file to D:\Tomcat 7.0\webapps\RESTfulWebServiceExample\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[4,19] package javax.ws.rs does not exist
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[5,19] package javax.ws.rs does not exist
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[6,19] package javax.ws.rs does not exist
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[7,19] package javax.ws.rs does not exist
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[8,24] package javax.ws.rs.core does not exist
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[10,2] cannot find symbol
  symbol: class Path
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[18,40] cannot find symbol
  symbol:   class PathParam
  location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[15,7] cannot find symbol
  symbol:   class GET
  location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[16,7] cannot find symbol
  symbol:   class Path
  location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[17,8] cannot find symbol
  symbol:   class Produces
  location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[33,40] cannot find symbol
  symbol:   class PathParam
  location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[30,8] cannot find symbol
  symbol:   class Path
  location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[31,8] cannot find symbol
  symbol:   class GET
  location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[32,8] cannot find symbol
  symbol:   class Produces
  location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[INFO] 14 errors 
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.041 s
[INFO] Finished at: 2015-06-15T11:33:01+05:30
[INFO] Final Memory: 12M/123M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project RESTfulWebServiceExample: Compilation failure: Compilation failure:
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[4,19] package javax.ws.rs does not exist
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[5,19] package javax.ws.rs does not exist
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[6,19] package javax.ws.rs does not exist
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[7,19] package javax.ws.rs does not exist
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[8,24] package javax.ws.rs.core does not exist
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[10,2] cannot find symbol
[ERROR] symbol: class Path
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[18,40] cannot find symbol
[ERROR] symbol:   class PathParam
[ERROR] location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[15,7] cannot find symbol
[ERROR] symbol:   class GET
[ERROR] location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[16,7] cannot find symbol
[ERROR] symbol:   class Path
[ERROR] location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[17,8] cannot find symbol
[ERROR] symbol:   class Produces
[ERROR] location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[33,40] cannot find symbol
[ERROR] symbol:   class PathParam
[ERROR] location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[30,8] cannot find symbol
[ERROR] symbol:   class Path
[ERROR] location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[31,8] cannot find symbol
[ERROR] symbol:   class GET
[ERROR] location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] /D:/Tomcat 7.0/webapps/RESTfulWebServiceExample/src/org/test/webservices/FeetToInchAndInchToFeetConversionService.java:[32,8] cannot find symbol
[ERROR] symbol:   class Produces
[ERROR] location: class org.test.webservices.FeetToInchAndInchToFeetConversionService
[ERROR] -> [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/MojoFailureException

Answer 1

检查以下依赖项是否存在？

<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.0-m01</version>
</dependency>

Answer 2

您似乎缺少了对javax.ws.rs的依赖 。 确保在pom.xml中具有此名称，然后重试。

无论您遵循的是哪一篇教程，都应该也有关于这些依赖项的大量信息。