最近几年来，地理信息系统无论是在理论上还是应用上都处在一个飞速发展的阶段。 GIS被应用于多个领域的建模和决策支持，如城市管理、区划、环境整治等等，地理信息成为信息时代重要的组成部分之一； “数字地球”概念的提出，更进一步推动了作为其技术支撑的GIS的发展。 与此同时，一些学者致力于相关的理论研究，如空间感知、空间数据误差、空间关系的形式化等等。 这恰好说明了地理信息系统作为应用技术和学科的两个方面，并且这两个方面构成了相互促进的发展过程。
Maven usage prototype archetype The plug-in creates the project. To create a simple Java application, we will use the maven-archetype-quickstart Plug-in.
In the following example, we will create a maven-based java application project under the C:MVN folder.
The format of the command is as follows:
mvn archetype:generate "-DgroupId=com.companyname.bank" "-DartifactId=consumerBanking" "-DarchetypeArtifactId=maven-archetype-quickstart" "-DinteractiveMode=false" Parameter description:
-DgroupId The name of the organization, the reverse of the company’s website and the name of the project
-DartifactId : project name-module name
-DarchetypeArtifactId Specify ArchetypeId,maven-archetype-quickstart to create a simple Java application
-DinteractiveMode Whether to use interactive mode or not
The resulting folder structure is as follows:
Description of each folder:
Folder structure | Description |
|---|---|
ConsumerBanking | Contains the src folder and pom.xml |
Src/main/java contains | The java code file is under the package structure (com/companyName/bank). |
Src/main/java test | The test code file is under the package structure (com/companyName/bank). |
Src/main/resources | Contains the image / properties file (in the above example, we need to create this structure manually). |
在 C:MVNconsumerBankingsrcmainjavacomcompanynamebank 文件夹中，可以看到一个 App.java，代码如下： 打开 C:MVNconsumerBankingsrctestjavacomcompanynamebank 文件夹，可以看到 Java 测试文件 AppTest.java。 For the rest of the development process, we just need to put it according to the structure mentioned in the table above, and Maven will help us take care of other things. 11.8.1. App.java ¶
packagecom.companyname.bank;/\*\* \* Hello world! \*\*/publicclassApp{publicstaticvoidmain(String[]args){System.out.println("Hello World!");}} 11.8.2. AppTest.java ¶
packagecom.companyname.bank;importjunit.framework.Test;importjunit.framework.TestCase;importjunit.framework.TestSuite;/\*\* \* Unit test for simple App.\*/publicclassAppTestextendsTestCase{/\*\* \* Create the test case \* \*@paramtestName name of the test case\*/publicAppTest(StringtestName){super(testName);}/\*\* \*@returnthe suite of tests being tested\*/publicstaticTestsuite(){returnnewTestSuite(AppTest.class);}/\*\* \* Rigourous Test :-)\*/publicvoidtestApp(){assertTrue(true);}}