[ERROR] Failed to execute goal on project sypro: Could not resolve dependencies

自己搭建一个Maven易做图后，随便找一个项目去测试，mvn install的时候出现下边的异常，求解！！！
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[INFO] Scanning for projects...  
[WARNING]   
[WARNING] Some problems were encountered while building the effective model for sy.demo:sypro:war:0.0.1-SNAPSHOT  
[WARNING] 'build.plugins.plugin.version' for org.mortbay.jetty:maven-jetty-plugin is missing. @ line 151, column 12  
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 141, column 12  
[WARNING]   
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.  
[WARNING]   
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.  
[WARNING]   
[INFO]                                                                           
[INFO] ------------------------------------------------------------------------  
[INFO] Building sypro Maven Webapp 0.0.1-SNAPSHOT  
[INFO] ------------------------------------------------------------------------  
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".  
SLF4J: Defaulting to no-operation (NOP) logger implementation  
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.  
Downloading: http://192.168.1.100:8081/nexus/content/groups/public/org/springframework/spring-core/3.2.3.RELEASE/spring-core-3.2.3.RELEASE.jar  
Downloading: http://192.168.1.100:8081/nexus/content/groups/public/org/springframework/spring-jdbc/3.2.3.RELEASE/spring-jdbc-3.2.3.RELEASE.jar  
Downloading: http://192.168.1.100:8081/nexus/content/groups/public/org/springframework/spring-tx/3.2.3.RELEASE/spring-tx-3.2.3.RELEASE.jar  
Downloading: http://192.168.1.100:8081/nexus/content/groups/public/net/sf/ehcache/ehcache/2.7.0/ehcache-2.7.0.jar  
Downloading: http://192.168.1.100:8081/nexus/content/groups/public/org/javassist/javassist/3.15.0-GA/javassist-3.15.0-GA.jar  
Downloading: http://192.168.1.100:8081/nexus/content/groups/public/junit/junit/4.11/junit-4.11.jar  
Downloading: http://192.168.1.100:8081/nexus/content/groups/public/org/aspectj/aspectjweaver/1.7.2/aspectjweaver-1.7.2.jar  
Downloading: http://192.168.1.100:8081/nexus/content/groups/public/com/alibaba/fastjson/1.1.31/fastjson-1.1.31.jar  
Downloading: http://192.168.1.100:8081/nexus/content/groups/public/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar  
[INFO] ------------------------------------------------------------------------  
[INFO] BUILD FAILURE  
[INFO] ------------------------------------------------------------------------  
[INFO] Total time: 1.578s  
[INFO] Finished at: Fri Dec 20 14:47:59 CST 2013  
[INFO] Final Memory: 8M/100M  
[INFO] ------------------------------------------------------------------------  
[ERROR] Failed to execute goal on project sypro: Could not resolve dependencies for project sy.demo:sypro:war:0.0.1-SNAPSHOT: The following artifacts could not be resolved: org.springframework:spring-core:jar:3.2.3.RELEASE, org.springframework:spring-jdbc:jar:3.2.3.RELEASE, org.springframework:spring-tx:jar:3.2.3.RELEASE, net.sf.ehcache:ehcache:jar:2.7.0, org.javassist:javassist:jar:3.15.0-GA, junit:junit:jar:4.11, org.aspectj:aspectjweaver:jar:1.7.2, com.alibaba:fastjson:jar:1.1.31, javax.servlet:servlet-api:jar:2.5: Could not find artifact org.springframework:spring-core:jar:3.2.3.RELEASE in nexus (http://192.168.1.100:8081/nexus/content/groups/public/) -> [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/DependencyResolutionException   --------------------编程问答-------------------- 自己先顶一个！！！

补充：Java ,  Java相关