GenericServlet抽象类

女爷i 2022-09-20 11:11 92阅读 0赞

### GenericServlet是一个抽象类，实现了Servlet接口和ServletConfig（以及Serializable）,已经完成以下： ###

### 1、将init方法中ServletConfig对象赋给一个类变量，以便它能通过调用getServletConfig来获取 ###

### 2、为Servlet接口中的所有方法都提供默认的实现 ###

### 3、提供调用ServletConfig对象中所有方法的方法 ###

### 实例： ###

###    import java.io.IOException;   import java.io.PrintWriter; ###

### import javax.servlet.GenericServlet;   import javax.servlet.ServletConfig;   import javax.servlet.ServletException;   import javax.servlet.ServletRequest;   import javax.servlet.ServletResponse;   import javax.servlet.annotation.WebInitParam;   import javax.servlet.annotation.WebServlet; ###

### /\*\*   \* Servlet implementation class GenericServletDemoServlet   \*/   @WebServlet(   name="GenericServletDemoServlet",urlPatterns="/genric",   initParams=\{   @WebInitParam(name="admin",value="刘"),   @WebInitParam(name="email",value="[liukunyao@OO.com][liukunyao_OO.com]")   \}   )   public class GenericServletDemoServlet extends GenericServlet \{   private static final long serialVersionUID = 1L;      /\*\*   \* @see GenericServlet\#GenericServlet()   \*/   public GenericServletDemoServlet() \{   super();   // TODO Auto-generated constructor stub   \} ###

###  /\*\*   \* @see Servlet\#service(ServletRequest request, ServletResponse response)   \*/   public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException \{   ServletConfig servletConfig = getServletConfig();   String admin = servletConfig.getInitParameter("admin");   String email = servletConfig.getInitParameter("email");   response.setCharacterEncoding("utf-8");   PrintWriter writer = response.getWriter();   writer.print("<html>"   \+"<head>"   \+"<meta charset='utf-8'>"   \+ "</head>"   \+"<body>"   \+"admin:"+admin+"<br>email:"+email   \+ "</body>"   \+ "</html>");         \} ###

### \}    ###

###  ###

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