使用gradle构建spring3框架时失败(Failed when build spring3 framework with gradle)

我试图在ubuntu 12.04中使用gradle构建spring 3框架。但是当构建方面进展时出现错误。错误如下：

spring-aspects:compileJava Download http://repo.springsource.org/libs-release/org/aspectj/aspectjtools/1.6.12/aspectjtools-1.6.12.jar [ant:iajc] <Unknown> [warning] Found @DeclareAnnotation while current release does not support it (see 'org.aspectj.weaver.bcel.AtAjAttributes') [ant:iajc] :spring-aspects:classes :spring-aspects:jar :spring-expression:javadoc /home/hendri/spring-framework/spring-expression/src/main/java/org/springframework/expression/spel/ast/OpMultiply.java:28: error: unmappable character for encoding UTF8 * <p>If any of the operands is of a reference type, unboxing conversion (�5.1.8) is performed. Then:<br> ^ 1 error FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':spring-expression:javadoc'. > Javadoc generation failed. * Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. BUILD FAILED Total time: 24 mins 10.5 secs

有人可以帮助我传递这个错误并构建spring 3框架吗？谢谢..

I tried to build spring 3 framework using gradle, in ubuntu 12.04. but there was an error when build aspects progress. the error is as follow:

spring-aspects:compileJava Download http://repo.springsource.org/libs-release/org/aspectj/aspectjtools/1.6.12/aspectjtools-1.6.12.jar [ant:iajc] <Unknown> [warning] Found @DeclareAnnotation while current release does not support it (see 'org.aspectj.weaver.bcel.AtAjAttributes') [ant:iajc] :spring-aspects:classes :spring-aspects:jar :spring-expression:javadoc /home/hendri/spring-framework/spring-expression/src/main/java/org/springframework/expression/spel/ast/OpMultiply.java:28: error: unmappable character for encoding UTF8 * <p>If any of the operands is of a reference type, unboxing conversion (�5.1.8) is performed. Then:<br> ^ 1 error FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':spring-expression:javadoc'. > Javadoc generation failed. * Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. BUILD FAILED Total time: 24 mins 10.5 secs

can somebody help me to pass this error and build the spring 3 framework?? thanks..