Jsp，Servlet 页面跳转

//index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	
	<h1>Servlet路径跳转</h1>
	<hr/>
	<!-- 使用相对路径访问HelloServlet -->
	<a href="HelloServlet">相对路径访问HelloServlet</a>
	<hr/>
	<!-- /servlet/HelloServlet 表示的是服务器的根目录 -->
	<!-- 也可以使用绝对路径访问HelloServlet ,path路径表示项目的根目录-->
	<%
		String path = request.getContextPath();//得到项目的上下文路径
		out.println(path);
	%>
	<hr/>
	<a href="<%=path%>/HelloServlet">绝对路径访问HelloServlet</a>
	<hr/>
	<!-- 表单中action的URL地址写法，与超链接方式完全相同。 -->
</body>
</html>

//HelloServlet.java
package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;
import java.net.URLEncoder;

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

/**
 * Servlet implementation class HelloServlet
 */
@WebServlet("/HelloServlet")
public class HelloServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public HelloServlet() {
        super();
        // TODO Auto-generated constructor stub
    }
	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		//request.setCharacterEncoding("utf-8");
		//response.setCharacterEncoding("utf-8");
		PrintWriter pw = response.getWriter();
		//pw.toString();
		String s = new String("Hello, This is HelloServlet!");
		pw.println(s);
		//使用重定向的方式跳转到test.jsp页面，但是当前路径是Servlet/HelloServlet
		//response.sendRedirect(request.getContextPath()+"/test.jsp");
		//使用服务器内部跳转，即请求转发.这里的斜线，表示项目的根目录。
		request.getRequestDispatcher("/test.jsp").forward(request, response);
	}
	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}
}

//test.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>test.jsp</title>
</head>
<body>
	<!-- 从HelloServlet页面跳转到test.jsp该页面 -->
	
	<h1>你好，这里是test.jsp!</h1>
	
</body>
</html>

来源：CSDN

作者：不想写博客ト

链接：https://blog.csdn.net/weixin_45892170/article/details/104221667

标签

servlet

jsp