举例：将传统本地 javassit-3.17.1-GA.jar包 改成maven引用，pom中 ---Add 输入javassit 搜索
这时候会搜索出超级多 Artifact Id相同 但Group Id不同 的包来（很多第三方的）；【这里前提是你先建了远程仓库索引才可以搜出来】
这个时候你就不知道哪个是你需要的了，
慢慢查看版本，他们的命名方式都不一样，总有一个是和你版本相同的版本号，那么这个 jar就是了，这样就可以确认 Group Id了。
http://www.cnblogs.com/rogge7/p/7238974.html--本文有些关于索引的建议
传统javaweb 改成 Maven项目 - 海蓝steven - 博客园
http://www.cnblogs.com/rogge7/p/7300294.html
--------------------------但是
对于上面的jar包本人找到了一个 org.javassist:javassist:bundle:3.17.1-GA 以为是相同的，最终maven项目更新的时候出错了：
Missing artifact org.javassist:javassist:bundle:3.17.1-GA
Could not transfer artifact org.javassist:javassist:bundle:3.17.1-GA from/to mirrors.ibiblio (http://mirrors.ibiblio.org/pub/mirrors/maven2): connect timed out org.eclipse.aether.transfer.ArtifactTransferException: Could not transfer artifact org.javassist:javassist:bundle:3.17.1-GA from/to mirrors.ibiblio (http://mirrors.ibiblio.org/pub/mirrors/maven2): connect timed out
at io.takari.aether.connector.AetherRepositoryConnector$2.wrap(AetherRepositoryConnector.java:895)
at io.takari.aether.connector.AetherRepositoryConnector$2.wrap(AetherRepositoryConnector.java:1)
at io.takari.aether.connector.AetherRepositoryConnector$GetTask.flush(AetherRepositoryConnector.java:673)
at io.takari.aether.connector.AetherRepositoryConnector.get(AetherRepositoryConnector.java:310)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:520)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:421)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:246)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveDependencies(DefaultRepositorySystem.java:367)
at org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDependenciesResolver.java:205)
at org.apache.maven.project.DefaultProjectBuilder.resolveDependencies(DefaultProjectBuilder.java:215)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:188)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:119)
at org.eclipse.m2e.core.internal.embedder.MavenImpl.readMavenProject(MavenImpl.java:636)
at org.eclipse.m2e.core.internal.project.registry.DefaultMavenDependencyResolver.resolveProjectDependencies(DefaultMavenDependencyResolver.java:63)
at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refreshPhase2(ProjectRegistryManager.java:530)
at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$3.call(ProjectRegistryManager.java:492)
at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$3.call(ProjectRegistryManager.java:1)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:496)
at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:351)
at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:298)
at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.getProjectFacade(MavenBuilder.java:154)
at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1.call(MavenBuilder.java:89)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:86)
at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:200)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:735)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:301)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:304)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:360)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:383)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:144)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:235)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: java.net.SocketTimeoutException: connect timed out
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at com.squareup.okhttp.internal.Platform.connectSocket(Platform.java:100)
at com.squareup.okhttp.Connection.connectSocket(Connection.java:196)
at com.squareup.okhttp.Connection.connect(Connection.java:172)
at com.squareup.okhttp.Connection.connectAndSetOwner(Connection.java:367)
at com.squareup.okhttp.OkHttpClient$1.connectAndSetOwner(OkHttpClient.java:128)
at com.squareup.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:328)
at com.squareup.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:245)
at com.squareup.okhttp.Call.getResponse(Call.java:267)
at com.squareup.okhttp.Call$ApplicationInterceptorChain.proceed(Call.java:224)
at com.squareup.okhttp.Call.getResponseWithInterceptorChain(Call.java:195)
at com.squareup.okhttp.Call.execute(Call.java:79)
at io.takari.aether.okhttp.OkHttpAetherClient.execute(OkHttpAetherClient.java:167)
at io.takari.aether.okhttp.OkHttpAetherClient.get(OkHttpAetherClient.java:113)
at io.takari.aether.connector.AetherRepositoryConnector$GetTask.resumableGet(AetherRepositoryConnector.java:600)
at io.takari.aether.connector.AetherRepositoryConnector$GetTask.run(AetherRepositoryConnector.java:453)
at io.takari.aether.connector.AetherRepositoryConnector.get(AetherRepositoryConnector.java:304)
... 37 more
错误提示
----所以，寻找 怎么确定原来jar包的 所有信息呢？？
点开原来jar包（）里面两个文件目前说明它的坐标。
得到坐标后，不用查找，直接Add 中填入 确定后，保存，项目就会自动更新jar包（或下载），最终会下载到本地仓库中 并引用。
-----
前提是这个jar包是maven创建的，如果是其它创建的，我不知道怎么确认，例如：