说明： Shows how to invoke a Web Service asynchronously from another Web Service.
文件列表：
async_req_res
.............\build.xml
.............\index.html
.............\src
.............\...\examples
.............\...\........\webservices
.............\...\........\...........\async_req_res
.............\...\........\...........\.............\client
.............\...\........\...........\.............\......\Main.java
.............\...\........\...........\.............\......\MainSync.java
.............\...\........\...........\.............\StockQuoteClientImpl.java
.............\...\........\...........\.............\StockQuoteImpl.java
.............\...\........\...........\.............\SyncClientImpl.java
