Servlet-HttpServlet对象

概述

servlet-api 4.0.1版本

常用方法

HttpServlet

protected void doGet(HttpServletRequest req, HttpServletResponse resp) {...}

protected void doPost(HttpServletRequest req, HttpServletResponse resp) {...}

protected void doPut(HttpServletRequest req, HttpServletResponse resp) {...}

protected void doDelete(HttpServletRequest req, HttpServletResponse resp) {...}

protected void service(HttpServletRequest req, HttpServletResponse resp) {...} // 负责调用上面四种方法

GenericServlet实现类

public void init() throws ServletException {}

public void destroy() {}

public String getInitParameter(String name) {...}

public Enumeration<String> getInitParameterNames() {}

public ServletConfig getServletConfig() {...} // 获取ServletConfig对象

public String getServletInfo() {...}

public ServletContext getServletContext() {...} // 获取ServletContext对象

public String getServletName() {...}

public abstract void service(ServletRequest req, ServletResponse res) throws ServletException, IOException;

ServletConfig接口

servlet容器使用的servlet配置对象，用于在初始化期间将信息传递给servlet。

public String getServletName(); // 接口

public ServletContext getServletContext(); // 接口

public String getInitParameter(String name); // 接口

public Enumeration<String> getInitParameterNames(); // 接口

Servlet接口

public void init(ServletConfig config) throws ServletException; // 接口

public void destroy(); // 接口

public ServletConfig getServletConfig(); // 接口

public String getServletInfo(); // 接口

public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException; // 接口