对于JAX-WS/Metro，这绝对不是线程安全的.***的选择是创建一个代理池，并在需要时从池中提取代理，进行配置，使用，清除设置值，然后返回到池中.

For JAX-WS/Metro, that's definitely not thread safe. The best bet is to create a Pool of proxies and, when needed, pull a proxy from the pool, configure it, use it, clear the set values, return to the pool.

或使用CXF.