未能执行项目的目标

我是第一次使用Maven。我正在尝试构建"GeoTools"(http://www.geotools.org/)它有一个似乎有据可查的"入门"页面。我使用的是NetBeans 7.3.1。当我构建我的项目时，我会得到一个"构建失败"：

Failed to execute goal on project tutorial: Could not resolve dependencies for project org.geotools:tutorial:jar:0.0.1-SNAPSHOT: The following artifacts could not be resolved: org.geotools:gt-shapefile:jar:10-SNAPSHOT, org.geotools:gt-swing:jar:10-SNAPSHOT: Failure to find org.geotools:gt-shapefile:jar:10-SNAPSHOT in http://download.java.net/maven/2 was cached in the local repository, resolution will not be reattempted until the update interval of maven2-repository.dev.java.net has elapsed or updates are forced -> [Help 1]
To see the full stack trace of the errors, re-run Maven with the -e switch.
Re-run Maven using the -X switch to enable full debug logging.

我真的不确定这意味着什么。在我的代码中，有几个导入被认为是不存在的，尽管我严格遵循了pom.xml的说明。例如：

import org.geotools.data.FileDataStore;

上面有一个带错误的下划线：

package org.geotools.data does not exist

这是我的XML。

<project
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.geotools</groupId>
<artifactId>tutorial</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>tutorial</name>
<url>http://maven.apache.org</url>
<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <geotools.version>10-SNAPSHOT</geotools.version>
</properties>
<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.geotools</groupId>
        <artifactId>gt-shapefile</artifactId>
        <version>${geotools.version}</version>
    </dependency>
    <dependency>
        <groupId>org.geotools</groupId>
        <artifactId>gt-swing</artifactId>
        <version>${geotools.version}</version>
    </dependency>
</dependencies>
<repositories>
    <repository>
        <id>maven2-repository.dev.java.net</id>
        <name>Java.net repository</name>
        <url>http://download.java.net/maven/2</url>
    </repository>
    <repository>
        <id>osgeo</id>
        <name>Open Source Geospatial Foundation Repository</name>
        <url>http://download.osgeo.org/webdav/geotools/</url>
    </repository>
</repositories>

有人能给我一些建议来运行这个工具吗？我是犯了一个基本的Maven错误，还是可能是特定于工具的错误？JAR显示在"依赖项"下，所以我不明白为什么会出现问题。

提前谢谢。