[0]  'dependencies.dependency.version' is missing for mysql:mysql-connector-java:jar

Reason: Failed to validate POM for project xxx at E:\weihaifeng\ieda_java_projects\xxx\pom.xml

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

[INFO] Trace

org.apache.maven.reactor.MavenExecutionException: Failed to validate POM for project xxxx at E:\weihaifeng\ieda_java_projects\xx\pom.xml

    at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:404)

    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:272)

    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)

    at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)

    at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

    at java.lang.reflect.Method.invoke(Method.java:597)

    at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)

    at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)

    at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)

    at org.codehaus.classworlds.Launcher.main(Launcher.java:375)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

    at java.lang.reflect.Method.invoke(Method.java:597)

    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

Caused by: org.apache.maven.project.InvalidProjectModelException: Failed to validate POM for project xxxx at E:\weihaifeng\ieda_java_projects\xxx\pom.xml

    at org.apache.maven.project.DefaultMavenProjectBuilder.processProjectLogic(DefaultMavenProjectBuilder.java:1077)

    at org.apache.maven.project.DefaultMavenProjectBuilder.buildInternal(DefaultMavenProjectBuilder.java:880)

    at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromSourceFileInternal(DefaultMavenProjectBuilder.java:508)

    at org.apache.maven.project.DefaultMavenProjectBuilder.build(DefaultMavenProjectBuilder.java:200)

    at org.apache.maven.DefaultMaven.getProject(DefaultMaven.java:604)

    at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:487)

    at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:391)

    ... 17 more

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.1</version>
</dependency>

加入之后,问题解决.