JDK 17 适配JAX-WS

### JAX-WS Compatibility and Setup with JDK 17

For ensuring that Java API for XML Web Services (JAX-WS) is compatible or can be adapted to work effectively within the environment provided by JDK 17, several considerations must be taken into account.

In earlier versions of Java SE up until version 8, JAX-WS was included as part of the standard library. However, starting from Java 9 due to modularization introduced through Project Jigsaw, modules like `java.xml.ws` which contain JAX-WS APIs were marked as deprecated for removal[^3]. Consequently, when using newer versions such as JDK 17, explicit steps are necessary to include these dependencies manually since they no longer come pre-packaged with the JDK installation.

To achieve this:

A recommended approach involves adding a dependency on an external implementation of JAX-WS via build tools like Maven or Gradle. For instance, one could add the Metro project's libraries—comprising implementations of both JAX-WS and JAXB—to the classpath during compilation time. This ensures all required classes will be available at runtime without relying upon those previously bundled inside older JDK distributions[^4].

Additionally, it might also prove beneficial to explore alternative frameworks designed specifically around more recent standards while still supporting SOAP-based web services if long-term maintenance becomes challenging given ongoing changes in underlying technologies over time.

<!-- Example POM configuration snippet -->
<dependency>
    <groupId>org.glassfish.metro</groupId>
    <artifactId>webservices-rt</artifactId>
    <version>3.0.2</version> <!-- Ensure you use latest stable release -->
</dependency>

<dependency>
    <groupId>javax.xml.bind</groupId>
    <artifactId>jaxb-api</artifactId>
    <version>2.3.1</version>
</dependency>

Furthermore, attention should be paid towards any potential conflicts between different module versions especially concerning transitive dependencies brought along by third-party packages added alongside core application codebase elements.

--related questions--

1. What specific challenges arise when migrating legacy applications utilizing JAX-WS from older JDKs to JDK 17?
2. How does the introduction of modularity affect other enterprise-level features beyond just JAX-WS support post-Java 8 releases?
3. Are there notable differences in performance metrics observed after adapting JAX-WS applications for compatibility under modern JDK environments including but not limited to JDK 17?
4. Can Spring Boot simplify integration efforts related to setting up JAX-WS endpoints compliantly across various JDK iterations?