maven 打包的 时候出错了

Question

[INFO] Scanning for projects...

[WARNING] 

[WARNING] Some problems were encountered while building the effective model for com.yanfei:HolleMaven:war:0.0.1-SNAPSHOT

[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 76, 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 HolleMaven Maven Webapp 0.0.1-SNAPSHOT

[INFO] ------------------------------------------------------------------------

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 3.359s

[INFO] Finished at: Sun Aug 16 20:54:15 CST 2015

[INFO] Final Memory: 9M/23M

[INFO] ------------------------------------------------------------------------

[ERROR] Failed to execute goal on project HolleMaven: Could not resolve dependencies for project com.yanfei:HolleMaven:war:0.0.1-SNAPSHOT: Failure to find net.sf.json-lib:json-lib

Answer 1

删掉本地仓库对应jar包，再update下项目

Answer 2

从中央库下载 
net.sf.json-lib:json-lib:jar:2.2.3 失败，建议换到 http://maven.oschina.net/ 下载。