ServletContext题目

javeweb文件怎么建立

关于eclipse建立Javaweb_abandon_i的博客-CSDN博客

DisplayServlet.java

package servlet;

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

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


@WebServlet(
		urlPatterns = { "/display" }, 
		initParams = { 
				@WebInitParam(name = "info", value = "123456")
		})
public class DisplayServlet extends HttpServlet {
	//private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		//response.getWriter().append("Served at: ").append(request.getContextPath());
		
		response.setContentType("text/html");
		PrintWriter out=response.getWriter();				
		out.print("");
		out.print("");
		out.print("");
		out.print("");		
		out.print("display
");
		ServletConfig config=this.getServletConfig();
		
		String value=config.getInitParameter("info");		
		out.print("info----"+value+"
");
		
		ServletContext application=this.getServletContext();
		String value2=application.getInitParameter("message");
		out.print("message----"+value+"
");
				
		out.print("");
		out.print("");		
	}

	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

web.xml

  demo1028
  
    index.html
    index.htm
    index.jsp
    default.html
    default.htm
    default.jsp
  
  
  
  	message
  	QTC.EDU.CN
  
  

index.jsp

<%@ page language="java" contentType="text/html; charset=gbk"
    pageEncoding="gbk"%>







	
	所谓的JSP页面，就是在HTML代码中嵌入JAVA代码。这是HTML代码

	ISO:国际标准化组织

	<% 
	int a=10;
	int sum=100;
	%>写在这里的是Java代码
	a=<%=a %>

	sum=<%=sum %>

	
	<%
	//ServletContext application=this.getServletContext();
	String value2=this.getServletContext().getInitParameter("message");
	%>
	
	

整体文件放置：

配置（忘记可查看Javaweb题目：输入圆的半径，求面积_abandon_i的博客-CSDN博客在文章偏下位置）

internal web browser中输入http://127.0.0.1:8080//demo1028/display

输入http://127.0.0.1:8080//demo1028/index.jsp

成功运行