tailieunhanh - Java Server Pages 2nd Edition phần 10

Một hồ bơi kết nối có thể được thực hiện phần còn lại của ứng dụng - servlet cũng như hành động JSTL truy cập cơ sở dữ liệu - trong một số cách khác nhau. Trong chương này chúng tôi thảo luận cách tiếp cận được sử dụng trong Chương 18 (bằng cách sử dụng một ứng dụng lắng nghe sự kiện) chi tiết hơn | Appendix D. JSP API Reference double quotes slashes question marks at signs colons and semicolons. Empty values may not behave the same way on all browsers. public void setVersion int version Sets the version of the cookie protocol this cookie complies with. A value of 0 means that the cookie must be sent to the browser as described by the original Netscape specification 1 that the cookie must be sent as defined by RFC 2109. RequestDispatcher The RequestDispatcher class defines an object that receives requests from the client and sends them to any resource such as a servlet HTML file or JSP file in the same web container. The container creates the RequestDispatcher object which is used as a wrapper around a resource located at a particular URI path or identified by a particular name. Synopsis Interface name Extends None Implemented by Internal container-dependent class. Methods public void forward ServletRequest req ServletResponse res Forwards a request from a servlet to another resource servlet JSP file or HTML file on the server. For a RequestDispatcher obtained via getRequestDispatcher the ServletRequest object has its path elements and parameters adjusted to match the path of the target resource. This method must be called before the response has been committed to the client before response body output has been flushed . If the response has already been committed this method throws an IllegalStateException. Uncommitted output in the response buffer is automatically cleared before the forward. The request and response parameters must be the same objects as were passed to the calling servlet s service method or be subclasses of the ServletRequestWrapper or ServletResponseWrapper classes that wrap them. public void include ServletRequest req ServletResponse res Includes the response generated by a resource servlet JSP page HTML file in the response. 549 Appendix D. JSP API Reference The ServletResponse object s path elements and .