Servlet
| void | destroy()
Called by the servlet container to indicate to a servlet that the servlet is being taken out of service. |
| ServletConfig | getServletConfig()
Returns a ServletConfig object, which contains initialization and startup parameters for this servlet. |
| java.lang.String | getServletInfo()
Returns information about the servlet, such as author, version, and copyright. |
| void | init(ServletConfig config)
Called by the servlet container to indicate to a servlet that the servlet is being placed into service. |
| void | service(ServletRequest req, ServletResponse res)
Called by the servlet container to allow the servlet to respond to a request. |
GenericServlet类
init()
A convenience method which can be overridden so that there's no need to call super.init(config).
HttpServlet类
Provides an abstract class to be subclassed to create an HTTP servlet suitable for a Web site. A subclass of HttpServlet must override at least one method, usually one of these:
- doGet, if the servlet supports HTTP GET requests
- doPost, for HTTP POST requests
- doPut, for HTTP PUT requests
- doDelete, for HTTP DELETE requests
- init and destroy, to manage resources that are held for the life of the servlet
- getServletInfo, which the servlet uses to provide information about itself
ServletRequest接口的部分方法
方法名 | 描述 |
getAttribute | 根据参数给定的属性名返回属性值。 |
getContentType | 返回客户请求数据的MIME类型 |
getInputStream | 返回以二进制数方式直接读取客户请求数据的输入流 |
getParameter | 根据给定的参数名返回参数值 |
getRemoteAddr | 返回远程客户主机的IP地址 |
getRemoteHost | 返回远程客户主机名 |
getRemotePort | 返回远程客房主机端口 |
setAttribute | 在ServletRequest中设置属性（包括属性名和属性值） |
ServletResponse接口的部分方法
方法名 | 描述 |
getOutputStream | 返回可以向客户端发送二进制数据的输出流对象ServletOutputStream |
getWriter | 返回可以向客户端发送字符数据的PrintWriter对象 |
getCharacterEncoding | 返回Servlet发送的响应数据的字符编码 |
getContentType | 返回Servlet发送的响应数据的MIME类型 |
setCharacterEncoding | 设置Servlet发送的响应数据的字符编码 |
setContentType | 设置Servlet发送的响应数据的MIME类型 |
