JSP Servlet简单实现

the5fire

发布于 2019-02-28 10:28:59

1.4K0

发布于 2019-02-28 10:28:59

文章被收录于专栏：Python程序员杂谈Python程序员杂谈

Jsp和Servlet个人感觉使用起来没有太大区别的，查了一下，说是jsp是Servlet的简化。这说明其本质是一样的，这里简单实现一下jsp和Servlet交互，比较简单，就不多说了，看代码吧。

在src中添加Servlet：

.. code:: java

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


public class TestServlet extends HttpServlet {

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String strRequest = request.getParameter("test");

        if (strRequest != null) {
            if ("T".equals(strRequest.trim())) {
                request.setAttribute("result11", "你输入的是T，代表正确");

            } else if ("F".equals(strRequest.trim())) {
                request.setAttribute("result11", "你输入的是F，代表错误");
            }
        }

        //转发
        request.getRequestDispatcher("/test.jsp").forward(request, response);

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        this.doGet(req, resp);
    }

}

在WebContent下添加jsp页面test.jsp：

.. code:: html

<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<%
    String strResult = (String)request.getAttribute("result11");
    if (strResult != null) {
        out.println(strResult);
    }
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>Insert title here</title>
</head>
<body>
    <form action="TestServlet">
        <input type="text" id="test" name="test">
        <input type="submit" value="提交">
    </form>
</body>
</html>

在WEB-INF下配置web.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:javaee="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <servlet>
        <servlet-name>TestServlet</servlet-name>
        <servlet-class>TestServlet</servlet-class>
        <load-on-startup>5</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>TestServlet</servlet-name>
        <url-pattern>/TestServlet</url-pattern>
    </servlet-mapping>

</web-app>

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原始发表：2010-12-29 ，如有侵权请联系 cloudcommunity@tencent.com 删除

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