文件名：TestServletRequest.java
@WebServlet("/TestServletRequest")
public class TestServletRequest extends HttpServlet {
 public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
        request._____1_____("param","HelloWorld");
        RequestDispatcher rd=request.____2______("____3______");
        rd._____4_____(request,response);
 }
}
文件名：AnotherServlet.java
@WebServlet("/AnotherServlet")
public class AnotherServlet extends HttpServlet {
 public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException { 
  String param= (String)request.____5______("param");
 }
}

public class HelloWorld extends ____1____ {
 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  //對(duì)用戶(hù)提交的請(qǐng)求用utf-8來(lái)解碼，否則會(huì)出現(xiàn)亂碼
  request.____2____("utf-8");  
   //通過(guò)設(shè)置Content-Type（內(nèi)容類(lèi)型）,告訴瀏覽器接下來(lái)發(fā)送的是HTML,編碼方式是UFT-8；
  response.____3____("text/html;charset=UTF-8");
     //獲取請(qǐng)求對(duì)象中name參數(shù)對(duì)應(yīng)的值
  String name = request.____4_____("name");
  String greeting = "Hello " + name + "!";
//獲取輸出流對(duì)象
  PrintWriter out = response.____5___();
  out.println(greeting);
 }
}

_____11_____//配置Servlet的mapping url
public class Process extends HttpServlet {
 public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
     //獲取請(qǐng)求參數(shù)值
  String un = request._____2_____(“username”);
    if(un!=null ){
if(un._____3____(“admin”)){                            
response._____4_____(“____5_____”);  
     }
    }
   }
}

public class Servlet1 extends HttpServlet {
 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
     //獲取名為param1的請(qǐng)求參數(shù)對(duì)應(yīng)的值
     String param1= request.____1______("___2____");
     //保存到request范圍中
     request._____3_____(“param1”,param1);
     //獲取轉(zhuǎn)發(fā)器對(duì)象
     RequestDispatcher rd=request._____4____("/Servlet2");
     //使用轉(zhuǎn)發(fā)請(qǐng)求方式跳轉(zhuǎn)到Servlet2
     rd.___5____(request,response);
 }
}

@WebFilter(
//僅對(duì)“/WebSite” URL格式進(jìn)行過(guò)濾
        urlPatterns = { " ___1____" }, 
        initParams = { 
                @WebInitParam(name = "site", value = "dalian")
        })
public class MyFilter implements Filter {
    protected String site;      
    public void destroy() {
        
    }    
    public void ___2 ___ (ServletRequest req, ServletResponse res, FilterChain fchain) throws IOException, ServletException {
//如果site不為空，則輸出site
        if(____ 3 _____) {
            System.out.println(“網(wǎng)站”+site);    
        }
        ___4___.doFilter(req, res);
    }
    public void init(FilterConfig conf) throws ServletException {
//獲取@WebFilter注解中配置的初始化參數(shù)
    this.site= ___5___.getInitParameter("site");
    }
}

public class Servlet2 extends HttpServlet {
 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
     //獲取當(dāng)前會(huì)話(huà)對(duì)象
     HttpSession session=request._____1_____();
     //獲取會(huì)話(huà)對(duì)象中的屬性值
     String name= (String)session._____2_____("_____3_____");
     //獲取輸出流對(duì)象
     PrintWriter out=response._____4_____();
     //輸出name
     out._____5_____(name);
 }
}