Java.io.IOException:The input doesn ' t contain any classes. Did you specify the proper '-injars ' opt

Problem Scenario

When confusing with the MAVEN + Proguard packaging project, the following errors are prompted:

version4.4doesn‘t containthe proper ‘-injars‘ options? [proguard]     at proguard.InputReader.execute(InputReader.java:91) [proguard]     at proguard.ProGuard.readInput(ProGuard.java:195) [proguard]     at proguard.ProGuard.execute(ProGuard.java:78) [proguard]     at proguard.ProGuard.main(ProGuard.java:499)

Problem analysis

Missing Injars configuration item!
-injars {Class_path} specifies the application jar,war,ear and directory to be processed

Solution Solutions

Add the Injars configuration item, because it is a Web project, so the war is specified here

<injar>${project.build.finalName}.war</injar>

Complete Example:

            <plugin>                <groupId>Com.pyx4me</groupId>                <artifactid>Proguard-maven-plugin</artifactid>                <version>2.0.4</version>                <executions>                    <execution>                        <phase>Package</phase>                        <goals>                            <goal>Proguard</goal>                        </goals>                    </Execution>                </executions>                <configuration>                    <obfuscate>True</obfuscate>                    <proguardinclude>${basedir}/proguard.conf</proguardinclude>                    <!--add dependencies, here you can modify as you need--                    <libs>                        <lib>${java.home}/lib/rt.jar</lib>                        <lib>Lib/jsp-api.jar</lib>                        <lib>Lib/servlet-api.jar</lib>                    </libs>                    <addmavendescriptor>False</addmavendescriptor>                    <Injar>${project.build.finalname}.war</Injar>                    <Outjar>${project.build.finalname}-pg.war</Outjar>                    <outputdirectory>${project.build.directory}</outputdirectory>                </configuration>                <dependencies>                     <!--using version 4.4 to confuse -                    <dependency>                        <groupId>Net.sf.proguard</groupId>                        <artifactid>Proguard</artifactid>                          <version>4.4</version>                        <scope>Runtime</Scope>                    </Dependency>                </dependencies>            </plugin>

Java.io.IOException:The input doesn ' t contain any classes. Did you specify the proper '-injars ' opt