将属性添加到Maven中的jar Manifest的最简单方法

Question

自上次Java更新以来,我需要使用该Trusted-Library属性标记我的applet jars清单,以避免在javascript与applet通信时出现警告弹出窗口.(见http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/mixed_code.html)

Manifest-Version: 1.0
Trusted-Library: true
Created-By: 1.6.0-internal (Sun Microsystems Inc.)

我之前从未做过这样的事情,是否有一个允许以无缝方式执行此操作的插件,或者我应该编写一个插件,还是使用ant插件？

罐子已经组装好并且可以通过依赖关系获得,复制到目标文件夹中以便在打包期间签名.我正在使用Maven 3

Answer 1

您可以在创建JAR文件期间使用Maven JAR插件执行此操作.将以下内容添加到您的pom.xml:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <configuration>
        <archive>
            <addMavenDescriptor>false</addMavenDescriptor>
            <manifestEntries>
                <Trusted-Library>true</Trusted-Library>
            </manifestEntries>
        </archive>
    </configuration>
</plugin>
<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jarsigner-plugin</artifactId>
    <version>1.2</version>
    <executions>
        <execution>
            <id>sign</id>
            <goals>
                <goal>sign</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <keystore>/path/to/testkeystore</keystore>
        <alias>myalias</alias>
        <storepass>test123</storepass>
    </configuration>
</plugin>

JAR文件规范中指定的主要属性可用作专用元素,例如:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <configuration>
        <archive>
            <addMavenDescriptor>false</addMavenDescriptor>
            <manifest>
                <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
                <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
            </manifest>
            <manifestEntries>
                <Trusted-Library>true</Trusted-Library>
            </manifestEntries>
        </archive>
    </configuration>
</plugin>

有关详细信息,请参阅Maven Archiver Reference.

要修改现有jar文件中的清单,请创建一个文本文件,例如mymanifest.mf包含所需属性的文件:

Trusted-Library: true

您可以通过执行以下命令将此文件的属性添加到现有jar:

jar -cfm file-to-be-modified.jar mymanifest.mf

这将修改manifest.mf给定jar 的内部.

Answer 2

最后,我刚刚使用了antrun插件,如下所示,antcontrib用于遍历jar列表:

集结trusted.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- This is a wrapper for all the other build files. -->
<project basedir="." name="project_name">

  <target name="addTrustedLibraryProperty">
    <jar file="${jarFile}" update="true">
      <manifest>
        <attribute name="Trusted-Library" value="true" />
      </manifest>
    </jar>
  </target>

  <target name="addTrustedLibraries">
    <ac:foreach target="addTrustedLibraryProperty" param="jarFile" xmlns:ac="antlib:net.sf.antcontrib">
      <path>
        <fileset dir="target/lib" includes="**/*.jar" />
      </path>
    </ac:foreach>
  </target>

</project>

在pom

<plugin>
        <artifactId>maven-antrun-plugin</artifactId>
        <executions>
          <execution>
            <id>add-trusted-library-attribute</id>
            <phase>package</phase>
            <configuration>
              <target>
                <ant antfile="${basedir}/build-trusted.xml">
                  <target name="addTrustedLibraries" />
                </ant>
              </target>
            </configuration>
            <goals>
              <goal>run</goal>
            </goals>
          </execution>
        </executions>
        <dependencies>
          <dependency>
            <groupId>ant-contrib</groupId>
            <artifactId>ant-contrib</artifactId>
            <version>1.0b3</version>
            <exclusions>
              <exclusion>
                <groupId>ant</groupId>
                <artifactId>ant</artifactId>
              </exclusion>
            </exclusions>
          </dependency>
          <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant-nodeps</artifactId>
            <version>1.8.1</version>
          </dependency>
        </dependencies>
      </plugin>