ant文件構建由於以下錯誤而失敗

Question

當我嘗試運行ant文件時，由於以下原因，構建將失敗：

[projectBuild] null DN Jaxb Beans:Multiple output locations are disabled, cannot associate entry: 'DN Jaxb Beans/src' with a specific output.
[projectBuild] null DN Jaxb Beans:Unbound classpath container: 'JRE System Library [J2SE-1.5]'.
[projectBuild] null DN Jaxb Beans:Unbound classpath container: 'org.maven.ide.eclipse.MAVEN2_CLASSPATH_CONTAINER'.
[projectBuild] null DN Jaxb Beans:Multiple output locations are disabled, cannot associate entry: 'DN Jaxb Beans/src' with a specific output.
[projectBuild] null DN Jaxb Beans:The project was not built since its classpath is incomplete. Cannot find the class file for java.lang.Object. Fix the classpath then try rebuilding this project.
[projectBuild] 1 JAXBVersion.java:This compilation unit indirectly references the missing type java.lang.Object (typically some required class file is referencing a type outside the classpath)
[projectBuild] Errors were detected after building DN Jaxb Beans
[projectBuild] ProjectBuild: DN Jaxb Beans Exception=Errors were detected after building DN Jaxb Beans
[projectBuild] BUILD FAILED: file:C:/workspace.May21/DN Ant Scripts/buildDev.xml:149: 

ProjectBuild: DN Jaxb Beans Exception=Errors were detected after building DN Jaxb Beans
Total time: 19 minutes 4 seconds

你能解決這個問題嗎？

Answer 1

以下錯誤是一個很好的指示：

Cannot find the class file for java.lang.Object

如果Java找不到java.lang.Object則Java安裝存在配置問題。 消息JRE System Library [J2SE-1.5]看起來像Eclipse jre配置名稱，因此我假設您正在通過Eclipse運行它。 我會嘗試在eclipse中的執行環境配置中刪除並重新添加。