似乎限制默认值在JDK8中已更改.

Seems restriction default have changed in JDK8.

发现了这一点: http://wiki.netbeans.org/FaqWSDLExternalSchema

但是，我很难找出如何将其应用于Maven插件的方法，但是传递jvm参数是可行的:

It was however hard for me to find out how to apply this to the Maven plugin, but passing jvm arguments worked:

 <plugin>
    <groupId>org.jvnet.jax-ws-commons</groupId>
    <artifactId>jaxws-maven-plugin</artifactId>
    <version>${jaxws.plugin.version}</version>
    <executions>
      <execution>
        <goals>
          <goal>wsimport</goal>
        </goals>
        <configuration>
          <verbose>true</verbose>
          <xdebug>true</xdebug>
          <wsdlDirectory>${basedir}/src/main/wsdl/</wsdlDirectory>
          <wsdlFiles>
            <wsdlFile>foo.wsdl</wsdlFile>
          </wsdlFiles>
          <vmArgs>
            <vmArg>-Djavax.xml.accessExternalDTD=all</vmArg>
            <vmArg>-Djavax.xml.accessExternalSchema=all</vmArg>
          </vmArgs>
        </configuration>
      </execution>
    </executions>
  </plugin>