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
----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。
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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：
