我一直在試圖追查下列異常的原因Geotools/Maven的依賴順序
org.geotools.feature.SchemaException:錯誤解碼SRS:4326
,我不斷看到有人說,我需要以下依賴
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-epsg-hsql</artifactId>
<version>${geotools.version}</version>
</dependency>
我用的是M2E Eclipse插件來建立我的罐子,我總是能夠通過Eclipse的成功運行我的應用程序,但是當我嘗試運行命令行我的罈子,會得到例外,所以我知道它有o用我的罐子建造的方式做些事情。我用下面的代碼創建了一個簡單的應用程序來複制問題。
import org.geotools.data.DataUtilities;
import org.geotools.feature.SchemaException;
import org.opengis.feature.simple.SimpleFeatureType;
public class Main {
/**
* @param args
* @throws SchemaException
*/
public static void main(String[] args) throws SchemaException {
SimpleFeatureType lineFeatureType = DataUtilities.createType("LINE", "geom:LineString:srid=4326,name:String");
System.out.println("Success!");
}
}
我POM文件看起來像這樣
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>groupid</groupId>
<artifactId>artifactid</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>example</name>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<geotools.version>12-RC1</geotools.version>
</properties>
<dependencies>
<!-- <dependency> -->
<!-- <groupId>org.geotools</groupId> -->
<!-- <artifactId>gt-shapefile</artifactId> -->
<!-- <version>${geotools.version}</version> -->
<!-- </dependency> -->
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-epsg-hsql</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-geometry</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-shapefile</artifactId>
<version>${geotools.version}</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>OSGEO GeoTools repo</id>
<url>http://download.osgeo.org/webdav/geotools</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>Main</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-my-jar-with-dependencies</id> <!-- this is used for inheritance merges -->
<phase>package</phase> <!-- bind to the packaging phase -->
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
我開始看到的是,如果我的依賴是順序
<dependencies>
<!-- <dependency> -->
<!-- <groupId>org.geotools</groupId> -->
<!-- <artifactId>gt-shapefile</artifactId> -->
<!-- <version>${geotools.version}</version> -->
<!-- </dependency> -->
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-epsg-hsql</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-geometry</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-shapefile</artifactId>
<version>${geotools.version}</version>
</dependency>
</dependencies>
然後當我執行我的從命令行輸入jar,我會看到「成功!」並且不會發生異常。但是,如果我的依賴關係是按此順序的
<dependencies>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-shapefile</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-epsg-hsql</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-geometry</artifactId>
<version>${geotools.version}</version>
</dependency>
<!-- <dependency> -->
<!-- <groupId>org.geotools</groupId> -->
<!-- <artifactId>gt-shapefile</artifactId> -->
<!-- <version>${geotools.version}</version> -->
<!-- </dependency> -->
</dependencies>
則會發生異常。
我認爲依賴關係的順序在maven項目中並不重要。有人可以解釋發生了什麼事嗎?我很欣賞任何反饋!
它不應該,但可能會發生奇怪;是否有多個完全相同的包/類的實現? –
這就是我的想法。我對geotools相當陌生,所以我不確定它們的包在幕後發生了什麼。 – keitheweber
我想可以解壓所有的罐子並檢查。 –