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我有一个pom.xml文件给出如下。当我运行mvn clean install，我得到的错误如何使ProGuard Maven插件使用最新的ProGuard版本？
[proguard] Error: Can't read [C:\Program Files\Java\jdk1.8.0_20\jre\lib\rt.jar]
(Can't process class [com/oracle/net/Sdp$1.class] (Unsupported class version number
[52.0] (maximum 51.0, Java 1.7)))
我试图升级ProGuard的版本，并在pom.xml文件设置为5.2。
但是当我运行mvn clean install，我得到在控制台以下消息：
[INFO] proguard jar: C:\Users\DP118M\.m2\repository\net\sf\proguard\proguard-base\4.11\proguard-base-4.11.jar
[proguard] ProGuard, version 4.11
如何让Maven的ProGuard的插件使用ProGuard的5.2版本，而不是4.11？
下面是完整的pom.xml：
<?xml version="1.0" encoding="UTF-8"?>
<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>ru.mycompany</groupId>
<artifactId>myproduct</artifactId>
<version>1.0.10-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<powermock.version>1.5.1</powermock.version>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<groupId>com.github.wvengen</groupId>
<artifactId>proguard-maven-plugin</artifactId>
<version>2.0.7</version>
<executions>
<execution>
<phase>package</phase>
<goals><goal>proguard</goal></goals>
</execution>
</executions>
<configuration>
<proguardVersion>5.2</proguardVersion>
<options>
<option>-allowaccessmodification</option>
<option>-dontshrink</option>
<option>-dontoptimize</option>
<option>-dontnote</option>
<option>-keepattributes Signature</option>
<option>-keep class ru.mycompany.prd.myproduct.myproductApp { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.gui.IGlassPaneObjectsDisplay { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.misc.IPersistenceForSimulationAuthors { *; }</option>
<option>-keep interface com.roots.map.overlay.ILatLongToScreenCoordinatesConverter { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.gui.IMenuBarFactory { *; }</option>
<option>-keepclassmembers enum ru.mycompany.prd.myproduct.api.osm.BuildingType {
public static **[] values();
public static ** valueOf(java.lang.String);
}</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.gui.IControlPanelBuilder { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.demography.IPerson { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.osm.IBuilding { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.osm.IWay { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.misc.ISimulationInfo { *; }</option>
<option>-keep class ru.mycompany.prd.myproduct.ApplicationStateForSimulationAuthors { *; }</option>
<option>-keep enum ru.mycompany.prd.myproduct.impl.gui.ApplicationStateSingleton { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.gui.IApplicationState { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.gui.IEventBus { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.gui.IMouseEventListener { *; }</option>
<option>-keep class ru.mycompany.prd.myproduct.impl.osm.Building { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.gui.IPolygon { *; }</option>
<option>-keep interface
ru.mycompany.prd.myproduct.api.gui.IGlassPaneRepainter { *; }</option>
<option>-keep class ru.mycompany.prd.myproduct.impl.gui.GuiUtils { *; }</option>
<option>-keep class ru.mycompany.prd.myproduct.impl.osm.Road { *; }</option>
<option>-keep class ru.mycompany.prd.myproduct.impl.osm.PolyLine { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.api.osm.IRoad { *;
}</option>
<option>-keep interface
ru.mycompany.prd.myproduct.api.gui.IStandardVisualElementPainter { *; }</option>
<option>-keep class ru.mycompany.prd.myproduct.actions.ApartmentBuildingAction { *; }</option>
<option>-keep class ru.mycompany.prd.myproduct.actions.RoadAction { *; }</option>
<option>-keep class ru.mycompany.prd.myproduct.actionsgui.ActionsDialog { *; }</option>
<option>-keep class ru.mycompany.prd.myproduct.actionsgui.ActionsTableModel { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.models.IPeopleBehaviourModel { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.actions.IAction { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.actionsgui.IActionCollection { *; }</option>
<option>-keep interface
ru.mycompany.prd.myproduct.impl.controller.IPersistenceInitializedListener { *; }</option>
<option>-keep class ru.mycompany.prd.myproduct.kpi.AbstractSensor { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.kpi.ISensor { *; }</option>
<option>-keep interface ru.mycompany.prd.myproduct.kpi.ISensorDataDisplay { *; }</option>
<option>-keep enum ru.mycompany.prd.myproduct.api.demography.Gender { *; }</option>
</options>
<libs>
<lib>${java.home}/lib/rt.jar</lib>
</libs>
<dependencies>
<dependency>
<groupId>net.sf.proguard</groupId>
<artifactId>proguard-base</artifactId>
<version>5.2</version>
<scope>runtime</scope>
</dependency>
</dependencies>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.easytesting</groupId>
<artifactId>fest-util</artifactId>
<version>1.2.3</version>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-support</artifactId>
<version>1.5.1</version>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-reflect</artifactId>
<version>1.5.1</version>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-core</artifactId>
<version>1.5.1</version>
</dependency>
<dependency>
<groupId>org.easytesting</groupId>
<artifactId>fest-assert-core</artifactId>
<version>2.0M8</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>15.0</version>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.9.5</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.3.173</version>
</dependency>
<dependency>
<groupId>ru.mycompany</groupId>
<artifactId>commons</artifactId>
<version>2.9</version>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>${powermock.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito</artifactId>
<version>${powermock.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.easymock</groupId>
<artifactId>easymock</artifactId>
<version>3.2</version>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-easymock</artifactId>
<version>${powermock.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>0.9.26</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>0.9.26</version>
</dependency>
<dependency>
<groupId>net.sf.opencsv</groupId>
<artifactId>opencsv</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>org.jgrapht</groupId>
<artifactId>jgrapht-jdk1.5</artifactId>
<version>0.7.3</version>
</dependency>
<dependency>
<groupId>jgraph</groupId>
<artifactId>jgraph</artifactId>
<version>5.13.0.0</version>
</dependency>
<dependency>
<groupId>com.googlecode.soundlibs</groupId>
<artifactId>jlayer</artifactId>
<version>1.0.1-1</version>
</dependency>
<dependency>
<groupId>com.javadocmd</groupId>
<artifactId>simplelatlng</artifactId>
<version>1.3.0</version>
</dependency>
<!-- Overpass stuff (start) -->
<dependency>
<groupId>se.kodapan.osm.common</groupId>
<artifactId>core</artifactId>
<version>0.0.2-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>se.kodapan.osm.common</groupId>
<artifactId>java</artifactId>
<version>0.0.2-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.1.2</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.3</version>
</dependency>
<!-- Overpass stuff (end) -->
<dependency>
<groupId>org.javatuples</groupId>
<artifactId>javatuples</artifactId>
<version>1.2</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.vividsolutions</groupId>
<artifactId>jts</artifactId>
<version>1.12</version>
</dependency>
</dependencies>
</project>