SpringMVC项目一之项目搭建实现简单登录 -

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SpringMVC项目一之项目搭建实现简单登录

博客分类：

spring
JAVA

spring springmvc 搭建入门

此项目还是根据上面的文章来的。

实现：在登录页输入用户名和密码，登录成功在页面显示用户名。就是这么简单。

1在zwp-web pom.xml中添加配置以引入springmvc jar包。

代码如下

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>com.zhouwangpu</groupId>
    <artifactId>zwp-parent</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>zwp-web</artifactId>
  <packaging>war</packaging>
  <name>zwp-web Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>com.zhouwangpu</groupId>
      <artifactId>zwp-common</artifactId>
      <version>${project.version}</version>
    </dependency>
    
    <!-- spring -->
  	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-webmvc</artifactId>
  		<version>4.2.6.RELEASE</version>
  	</dependency>
  	
  </dependencies>
  <build>
    <finalName>zwp-web</finalName>
  </build>
</project>

2修改web.xml.

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  
  	<!-- spring配置文件 -->
  	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext*.xml</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<!-- springmvc配置 -->
	<servlet>
		<servlet-name>spring</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring-servlet.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>spring</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
</web-app>

3在src/main/resources下添加spring配置文件

spring配置文件：applicationContext.xml. 文件名需要与web.xml中classpath:applicationContext*.xml 中applicationContext的值开头。

代码：

<?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:cache="http://www.springframework.org/schema/cache"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:task="http://www.springframework.org/schema/task"  
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context-4.2.xsd
       http://www.springframework.org/schema/tx 
       http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
       http://www.springframework.org/schema/cache
	   http://www.springframework.org/schema/cache/spring-cache-4.2.xsd
	   http://www.springframework.org/schema/task  
	   http://www.springframework.org/schema/task/spring-task-4.2.xsd ">

    </beans>

暂时没有啥有用的代码。后面的章节有用，先创建。

springmvc配置文件：spring-servlet.xml与web.xml 中classpath:spring-servlet.xml 中spring-servlet相同。

代码：

<?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:aop="http://www.springframework.org/schema/aop" 
	xmlns:mvc="http://www.springframework.org/schema/mvc" 
	xmlns:cache="http://www.springframework.org/schema/cache"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context-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/aop
       http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
       http://www.springframework.org/schema/cache
			  	http://www.springframework.org/schema/cache/spring-cache-4.2.xsd">
       
       	<context:component-scan base-package="com.zhouwangpu.web.*"/>
       	
	 	<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  			<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
  			<property name="prefix" value="/WEB-INF/jsp/" />
 			<property name="suffix" value=".jsp" />
   		</bean>
	</beans>

视图放在/WEB-INF/jsp/下。

4创建视图

登录页面。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" method="post">
		<label>用户名：</label><input type="text" name="userName"/>
		<label>密码：</label><input type="password" name="password"/>
		<button type="submit">登录</button>
	</form>
</body>
</html>

登录成功页：main.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>
欢迎：${userName }
</body>
</html>

5controller层

LoginController:

package com.zhouwangpu.web.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

@Controller
@RequestMapping("/")
public class LoginController {

	@RequestMapping(method=RequestMethod.GET,value="login")
	public String login(Model model){
		return "login";
	}
	
	@RequestMapping(method=RequestMethod.POST,value="login")
	public String login(Model model,@RequestParam String userName,@RequestParam String password){
		model.addAttribute("userName",userName);
		return "main";
	}
}

项目结构：

运行下

发现获取不到变量值。

修改下web.xml的头。

最终如下：

<?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" xmlns:web="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_3_0.xsd" id="WebApp_ID" version="3.0">

  <display-name>Archetype Created Web Application</display-name>
  
  	<!-- spring配置文件 -->
  	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext*.xml</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<!-- springmvc配置 -->
	<servlet>
		<servlet-name>spring</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring-servlet.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>spring</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
</web-app>