france

https://github.com/francecil

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上一章用Maven新建了web项目成功后,本文演示在此基础上应用servlet。

1.首先修改pom.xml文件,添加servlet依赖

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.france.demo</groupId>
  <artifactId>maven-web-demo</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>maven-web-demo Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
   <!-- JUnit配置 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <!-- 添加Servlet -->  
    <dependency>    
        <groupId>javax.servlet</groupId>    
        <artifactId>servlet-api</artifactId>    
        <version>2.5</version>    
        <scope>provided</scope>    
    </dependency>
  </dependencies>
  <build>
    <finalName>maven-web-demo</finalName>
  </build>
</project>

修改完保存后,项目会从Maven仓库中自动添加servlet-api-2.5.jar包的引用,如果仓库中没有,会自动下载。

引用后见图。


2.新建一个Servlet

在src/main/java下创建一个Servlet,ServletDemo

package com.france.demo;

import java.io.IOException;

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

public class ServletDemo extends HttpServlet {

	private static final long serialVersionUID = 1L;
    
    public ServletDemo() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");  
        response.setContentType("text/html;charset=utf-8");
        
        String action = request.getParameter("action");  
        if("login_input".equals(action)) {  
            request.getRequestDispatcher("login.jsp").forward(request , response);  
        } else if("login".equals(action)) {  
            String name = request.getParameter("name");  
            String password = request.getParameter("password");  
              
            System.out.println("name->" + name + ",password->" + password);
        }
    }

}


3.修改Web.xml

<?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">
  <javaee:display-name>Archetype Created Web Application</javaee:display-name>
  <servlet>
    <javaee:description></javaee:description>
    <javaee:display-name>ServletDemo</javaee:display-name>
    <servlet-name>ServletDemo</servlet-name>
    <servlet-class>com.france.demo.ServletDemo</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>ServletDemo</servlet-name>
    <url-pattern>/demo</url-pattern>
  </servlet-mapping>
</web-app>

4.创建index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <p>用Maven创建web项目,测试Servlet</p>
    <a href="demo?action=login_input">登录(demo?action=login_input)</a>
</body>
</html>

5.创建login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form action="demo?action=login" method="post">  
        Name:<input type="text" name="name" />  
        Password:<input type="password" name="password" />  
              
        <input type="submit" value="登录" />  
    </form>  
</body>
</html>

OK,可以测试一下






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posted on 2015-01-04 17:45  france  阅读(227)  评论(0编辑  收藏  举报