我可以从代码中将几何数据插入数据库，但只能使用SQL编辑器（例如PGAdmin III）查询数据。我无法将几何数据检索回我的代码。每次尝试都将以：“ org.postgresql.util.PGobject类型的接收对象”结尾。即使运行简单的查询来测试两个几何值是否相等，我也会收到此错误。
2017-09-11 19:04:47,771 WARNING [javax.enterprise.resource.webcontainer.jsf.lifecycle] (default task-37) /welcomePrimefaces.xhtml @46,106 actionListener="#{controlador.testar()}": java.lang.IllegalStateException: Received object of type org.postgresql.util.PGobject: javax.el.ELException: /welcomePrimefaces.xhtml @46,106 actionListener="#{controlador.testar()}": java.lang.IllegalStateException: Received object of type org.postgresql.util.PGobject at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:111) at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:147) at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88) at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:814) at javax.faces.component.UICommand.broadcast(UICommand.java:300) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292) at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81) at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138) at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135) at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48) at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105) at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508) at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508) at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508) at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508) at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:326) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:812) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.IllegalStateException: Received object of type org.postgresql.util.PGobject at org.hibernate.spatial.dialect.postgis.PGGeometryTypeDescriptor.toGeometry(PGGeometryTypeDescriptor.java:123) at org.hibernate.spatial.dialect.postgis.PGGeometryTypeDescriptor$2.doExtract(PGGeometryTypeDescriptor.java:87) at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:47) at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:235) at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:231) at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:222) at org.hibernate.type.AbstractStandardBasicType.hydrate(AbstractStandardBasicType.java:296) at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2840) at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1735) at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1661) at org.hibernate.loader.Loader.getRow(Loader.java:1550) at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:733) at org.hibernate.loader.Loader.processResultSet(Loader.java:978) at org.hibernate.loader.Loader.doQuery(Loader.java:936) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:342) at org.hibernate.loader.Loader.doList(Loader.java:2622) at org.hibernate.loader.Loader.doList(Loader.java:2605) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2434) at org.hibernate.loader.Loader.list(Loader.java:2429) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:501) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:371) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:216) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1339) at org.hibernate.internal.QueryImpl.list(QueryImpl.java:87) at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:606) at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:483) at org.jboss.as.jpa.container.QueryNonTxInvocationDetacher.getResultList(QueryNonTxInvocationDetacher.java:58) at br.gov.rio.iplanrio.projetox.controle.Controlador.testar(Controlador.java:121) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at javax.el.ELUtil.invokeMethod(ELUtil.java:311) at javax.el.BeanELResolver.invoke(BeanELResolver.java:415) at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:256) at com.sun.el.parser.AstValue.invoke(AstValue.java:285) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) ... 49 more 2017-09-11 19:04:47,800 SEVERE [javax.enterprise.resource.webcontainer.jsf.context] (default task-37) java.lang.IllegalStateException: Received object of type org.postgresql.util.PGobject at org.hibernate.spatial.dialect.postgis.PGGeometryTypeDescriptor.toGeometry(PGGeometryTypeDescriptor.java:123) at org.hibernate.spatial.dialect.postgis.PGGeometryTypeDescriptor$2.doExtract(PGGeometryTypeDescriptor.java:87) at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:47) at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:235) at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:231) at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:222) at org.hibernate.type.AbstractStandardBasicType.hydrate(AbstractStandardBasicType.java:296) at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2840) at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1735) at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1661) at org.hibernate.loader.Loader.getRow(Loader.java:1550) at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:733) at org.hibernate.loader.Loader.processResultSet(Loader.java:978) at org.hibernate.loader.Loader.doQuery(Loader.java:936) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:342) at org.hibernate.loader.Loader.doList(Loader.java:2622) at org.hibernate.loader.Loader.doList(Loader.java:2605) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2434) at org.hibernate.loader.Loader.list(Loader.java:2429) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:501) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:371) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:216) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1339) at org.hibernate.internal.QueryImpl.list(QueryImpl.java:87) at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:606) at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:483) at org.jboss.as.jpa.container.QueryNonTxInvocationDetacher.getResultList(QueryNonTxInvocationDetacher.java:58) at br.gov.rio.iplanrio.projetox.controle.Controlador.testar(Controlador.java:121) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at javax.el.ELUtil.invokeMethod(ELUtil.java:311) at javax.el.BeanELResolver.invoke(BeanELResolver.java:415) at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:256) at com.sun.el.parser.AstValue.invoke(AstValue.java:285) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:147) at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88) at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:814) at javax.faces.component.UICommand.broadcast(UICommand.java:300) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292) at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81) at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138) at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135) at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48) at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105) at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508) at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508) at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508) at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508) at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:326) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:812) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)
我正在使用：-hibernate5.2-PostgreSQL 9.6-Postgis 2.3-JDBC驱动程序PostgreSQL 42.1.4-Wildfly 11（CR1）
这是模型类：
import java.io.Serializable; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import com.vividsolutions.jts.geom.Point; import com.vividsolutions.jts.geom.Geometry; import com.vividsolutions.jts.geom.LineString; import com.vividsolutions.jts.geom.Polygon; import javax.persistence.Column; @Entity public class PontodeInteresse implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.SEQUENCE) private Long id; private String descricao; @Column(columnDefinition = "geometry(Point,4326)") private Point ponto; @Column(columnDefinition = "geometry(LineString,4326)") private LineString linha; @Column(columnDefinition = "geometry(Geometry,4326)") private Geometry geometry; @Column(columnDefinition = "geometry(Polygon,4326)") private Polygon poligono;
POM文件：
<dependencies> <dependency> <groupId>org.primefaces</groupId> <artifactId>primefaces</artifactId> <version>6.1</version> </dependency> <dependency> <groupId>javax</groupId> <artifactId>javaee-web-api</artifactId> <version>6.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>com.vividsolutions</groupId> <artifactId>jts</artifactId> <version>1.13</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-spatial</artifactId> <version>5.2.10.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>5.2.10.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>5.2.10.Final</version> </dependency> <dependency> <groupId>dom4j</groupId> <artifactId>dom4j</artifactId> <version>1.6.1</version> <scope>provided</scope> </dependency> </dependencies>
在persistence.xml文件中，我正在使用以下方言属性：
<property name="hibernate.dialect" value="org.hibernate.spatial.dialect.postgis.PostgisPG95Dialect"/>
PS：我已经尝试过PostgisDialect
最后，该方法带有一个简单的测试查询：
public void testar() { try { GeometryFactory gf = new GeometryFactory(); LinearRing shell = gf.createLinearRing(new Coordinate[] { new Coordinate(-43.56006145477295,-22.8861191211294), new Coordinate(-43.55607032775879,-22.8861191211294), new Coordinate(-43.55607032775879,-22.88279796969916), new Coordinate(-43.56006145477295,-22.88279796969916), new Coordinate(-43.56006145477295,-22.8861191211294)}); LinearRing[] holes = new LinearRing[0]; Polygon polygon = gf.createPolygon(shell, holes); polygon.setSRID(4326); Query q = entityManager.createQuery("from PontodeInteresse where equals(geometry, :geo) = true").setParameter("geo", polygon); List<PontodeInteresse> pontos = q.getResultList(); } catch(Exception e) { System.out.println(e.getMessage()); }//try }
我在这里完全迷失了想法。请帮忙。谢谢
在部署应用程序之前，您需要在Wildfly中添加Postgis，hibernate- spatial和其他相关的库，这是因为您使用的hibernate状态已与wildfly捆绑在一起，但其他库与war捆绑在一起，因此它们是使用不同的类加载器。
如果检查此代码，则可以看到强制转换正确，并且错误消息没有意义，这通常是类加载器的问题。
要解决此问题，您需要将所有库添加到您的wildfly中，为此，您可以执行以下操作：
cd $JBOSS_PATH/modules/system/layers/base/org/hibernate/main mvn dependency:copy -Dartifact=org.hibernate:hibernate-spatial:5.0.7.Final:jar -DoutputDirectory=. mvn dependency:copy -Dartifact=org.geolatte:geolatte-geom:1.0.1:jar -DoutputDirectory=. mvn dependency:copy -Dartifact=com.vividsolutions:jts:1.13:jar -DoutputDirectory=.
编辑module.xml文件以添加您的部门：
module.xml
<resource-root path="hibernate-spatial-5.0.7.Final.jar"/> <resource-root path="jts-1.13.jar"/> <resource-root path="geolatte-geom-1.0.1.jar"/>
在依赖标签中，添加：
<module name="org.slf4j"/>
另外，如果您使用的是postgresql，则需要添加依赖项标签：
<module name="org.postgresql"/>
在mvn命令中使用正确的版本来下载正确的jar。
mvn
