springMVC學習（1）----一個簡單的Maven的springMVC項目搭建

1、導入SpringMVC需要的jar包（下面代碼放在pom.xml中，maven使用的是阿里雲鏡像）

       <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>4.3.18.RELEASE</version>
</dependency>
   <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.3.18.RELEASE</version>
</dependency>
   <!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>4.3.18.RELEASE</version>
</dependency>
<!-- AOP -->
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.8.13</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>4.3.10.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.10.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

 

編寫一個簡單的登錄

2、創建User類

package com.springdemo.pojo;

import java.io.Serializable;

public class User implements Serializable{     //實現序列化
	private String username;
	private String password;
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public User(String username, String password) {
		super();
		this.username = username;
		this.password = password;
	}
	
}

3、創建UserController類

package com.springdemo;

import java.util.ArrayList;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.springdemo.pojo.User;

@Controller
@RequestMapping("/user")  //當前請求的地址爲http://localhost:8080/springmvc/user
public class UserController {
	@RequestMapping("/login")
	public String login(String username,String password){
		if("w".equals(username)&&"111".equals(password)){
			return "show";
		}else{
			return "login";
		}
	}
}

4、創建springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation=
	"http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
    http://www.springframework.org/schema/mvc 
    http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-4.2.xsd">
    
    <!-- 配置一個掃描器   
         Spring可以自動去掃描base-package下面的包或者子包下面的java文件，
         如果掃到有Spring相關注解的類，則把這些類註冊爲Spring的bean
    -->
	<context:component-scan base-package="com.springdemo"></context:component-scan>

	<!-- 打開依賴注入開關 -->
	<context:annotation-config></context:annotation-config>

	<!--  配置視圖解析器  prefix:表示前綴    suffix:表示後綴

		  如果登陸成功,則返回的是字符串是show，則視圖的完整路徑爲/WEB-INF/show.jsp，則爲登陸功 
          後跳轉的頁面
	 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		 <property name="prefix" value="/WEB-INF/"></property>
 		 <property name="suffix" value=".jsp"></property>
	</bean>
</beans>

5、創建一個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="login.action" method="post">
		用戶名：<input type="text" name="username"><br />
		密&nbsp;&nbsp;&nbsp;碼：<input type="password" name="password"><br />
		<input type="submit" name="submit" value="提交">
		<input type="reset" name="reset" value="重置"><br />
	</form>
</body>
</html>

6、創建一個show.jsp

登陸成功後會跳轉到此頁面來。如果登錄失敗就會跳轉到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>
登陸成功!
</body>
</html>

7、web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>springmvcdemo</display-name>
  
  
  <filter>
		<filter-name>CharacterEncodingFilter</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>utf-8</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>CharacterEncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
  
  
<!--   前端控制器 -->
<!-- 默認情況下：spring MVC 會從WEB-INF目錄中查找dispatcherServlet-servlet.xml -->
<!-- 需要手動指定spring MVC 的配置文件springmvc.xml -->
 <servlet>
         <servlet-name>springmvc</servlet-name>
         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
           <param-name>contextConfigLocation</param-name>
           <param-value>classpath:springmvc.xml</param-value>
  </init-param>
  <!-- 指定最先加載核心控制器 -->
  <load-on-startup>1</load-on-startup>
 </servlet>

 <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>*.action</url-pattern>
 </servlet-mapping>
  
<!--   監聽器 -->
 <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>

 <context-param>
       <param-name>contextConfigLocation</param-name>
       <param-value>classpath:applicationContext-*.xml</param-value>
 </context-param>

  
</web-app>

8、把此項目發佈到Tomcat上

在網址上輸入http://localhost:8080/springmvcdemo/user/login.action

輸入用戶名w 密碼111