我一直在试图找出以下异常的原因
org.geotools.feature.SchemaException:错误解码srs: 4326
我不断地看到人们说我需要以下的依赖
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-epsg-hsql</artifactId>
<version>${geotools.version}</version>
</dependency>我使用m2e eclipse插件来构建jar,并且我总是能够通过eclipse成功地运行我的应用程序,但是当我尝试从命令行运行jar时,我会得到异常,因此我知道它必须与构建jar的方式有关。我用下面的代码创建了一个简单的应用程序来复制这个问题。
import org.geotools.data.DataUtilities;
import org.geotools.feature.SchemaException;
import org.opengis.feature.simple.SimpleFeatureType;
public class Main {
/**
* @param args
* @throws SchemaException
*/
public static void main(String[] args) throws SchemaException {
SimpleFeatureType lineFeatureType = DataUtilities.createType("LINE", "geom:LineString:srid=4326,name:String");
System.out.println("Success!");
}}
我的pom文件看起来像这样
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>groupid</groupId>
<artifactId>artifactid</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>example</name>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<geotools.version>12-RC1</geotools.version>
</properties>
<dependencies>
<!-- <dependency> -->
<!-- <groupId>org.geotools</groupId> -->
<!-- <artifactId>gt-shapefile</artifactId> -->
<!-- <version>${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>${geotools.version}</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>OSGEO GeoTools repo</id>
<url>http://download.osgeo.org/webdav/geotools</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>Main</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-my-jar-with-dependencies</id> <!-- this is used for inheritance merges -->
<phase>package</phase> <!-- bind to the packaging phase -->
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
我开始看到的是,如果我的依赖关系是按照这个顺序
<dependencies>
<!-- <dependency> -->
<!-- <groupId>org.geotools</groupId> -->
<!-- <artifactId>gt-shapefile</artifactId> -->
<!-- <version>${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>${geotools.version}</version>
</dependency>
</dependencies>然后,当我从命令行执行jar时,我会看到“成功!”例外情况不会发生。但是如果我的依赖关系是按照这个顺序
<dependencies>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-shapefile</artifactId>
<version>${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>然后就会出现异常。
我认为依赖关系的顺序在maven项目中并不重要。有人能解释一下这是怎么回事吗?我很感谢你的反馈!
发布于 2015-07-21 08:39:53
一般来说,mvn并不关心依赖关系的顺序,这是正确的,但是它确实按照pom文件中显示的顺序对它们进行了处理。
当您正在打包jars时,这一点变得非常重要,因为默认的maven包程序不能很好地处理GeoTools用来加载工厂的SPI文件,在本例中是EPSG引用工厂。
如果您使用Maven阴影包装机,它将正确地构建文件。在GeoTools常见问题中有一个更长的讨论和一个例子。
https://stackoverflow.com/questions/31525365
复制相似问题