使用ant1.10.7编译nutch2.3.1时遇到以下报错：
resolve-default:
[ivy:resolve] :: Apache Ivy 2.3.0 - 20130110142753 :: http://ant.apache.org/ivy/ ::
[ivy:resolve] :: loading settings :: file = /usr/local/nutch/ivy/ivysettings.xml
[ivy:resolve]
[ivy:resolve] :: problems summary ::
[ivy:resolve] :::: WARNINGS
[ivy:resolve] ::::::::::::::::::::::::::::::::::::::::::::::
[ivy:resolve] :: UNRESOLVED DEPENDENCIES ::
[ivy:resolve] ::::::::::::::::::::::::::::::::::::::::::::::
[ivy:resolve] :: org.springframework#spring-core;4.0.4.RELEASE: configuration not found in org.springframework#spring-core;4.0.4.RELEASE: 'master'. It was required from org.apache.nutch#nutch;working@lxp-virtual-machine master
[ivy:resolve] :: org.springframework#spring-context;4.0.4.RELEASE: configuration not found in org.springframework#spring-context;4.0.4.RELEASE: 'master'. It was required from org.apache.nutch#nutch;working@lxp-virtual-machine master
[ivy:resolve] ::::::::::::::::::::::::::::::::::::::::::::::
[ivy:resolve]
[ivy:resolve] :: USE VERBOSE OR DEBUG MESSAGE LEVEL FOR MORE DETAILS
BUILD FAILED
/usr/local/nutch/build.xml:468: impossible to resolve dependencies:
resolve failed - see output for details
Total time: 18 seconds
网上没有找到相关的内容，有没有大神遇到过这个问题，该如何解决呢？谢谢！
