Java Web关键字填空示例详解

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 {
  //对用户提交的请求用utf-8来解码，否则会出现乱码
  request.____2____("utf-8");  
   //通过设置Content-Type（内容类型）,告诉浏览器接下来发送的是html,编码方式是UFT-8；
  response.____3____("text/html;charset=UTF-8");
     //获取请求对象中name参数对应的值
  String name = request.____4_____("name");
  String greeting = "Hello " + name + "!";
//获取输出流对象
  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 {
     //获取请求参数值
  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 {
     //获取名为param1的请求参数对应的值
     String param1= request.____1______("___2____");
     //保存到request范围中
     request._____3_____(“param1”,param1);
     //获取转发器对象
     RequestDispatcher rd=request._____4____("/Servlet2");
     //使用转发请求方式跳转到Servlet2
     rd.___5____(request,response);
 }
}

@WebFilter(
//仅对“/WebSite” URL格式进行过滤
        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不为空，则输出site
        if(____ 3 _____) {
            System.out.println(“网站”+site);    
        }
        ___4___.doFilter(req, res);
    }
    public void init(FilterConfig conf) throws ServletException {
//获取@WebFilter注解中配置的初始化参数
    this.site= ___5___.getInitParameter("site");
    }
}

public class Servlet2 extends HttpServlet {
 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
     //获取当前会话对象
     HttpSession session=request._____1_____();
     //获取会话对象中的属性值
     String name= (String)session._____2_____("_____3_____");
     //获取输出流对象
     PrintWriter out=response._____4_____();
     //输出name
     out._____5_____(name);
 }
}