maven学习（4）-Maven 构建Web 项目

紧接着上一节(3)，现在maven新建web项目，user-web。模拟一个用户登录的需求：

工程结构：

pom.xml:

<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.cy.user</groupId><artifactId>user-web</artifactId><packaging>war</packaging><version>0.0.1-SNAPSHOT</version><dependencies><!-- 添加Servlet支持 --><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>javax.servlet.jsp-api</artifactId><version>2.3.1</version></dependency><!-- 添加jstl支持 --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><!-- 添加Spring支持 --><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>4.1.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>4.1.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>4.1.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.1.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context-support</artifactId><version>4.1.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>4.1.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>4.1.7.RELEASE</version></dependency><dependency><groupId>com.cy.user</groupId><artifactId>user-service</artifactId><version>0.0.1-SNAPSHOT</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency></dependencies><build><finalName>user-web</finalName></build>
</project>

注意上面user-web项目添加了第3节里面的user-service依赖，需要将user-service maven install发布到本地仓库；

但是不需要添加user-dao的依赖，因为user-service里面已经依赖了user-dao。依赖的继承；

src/main/resources/srping-mvc.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:aop="http://www.springframework.org/schema/aop"   xmlns:context="http://www.springframework.org/schema/context"  xmlns:jee="http://www.springframework.org/schema/jee"  xmlns:tx="http://www.springframework.org/schema/tx"  xsi:schemaLocation="    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd  http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd  http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd  http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">    <!-- 使用注解的包，包括子集 --><context:component-scan base-package="com.cy.user.controller" /><!-- 视图解析器 --><bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/" /><property name="suffix" value=".jsp"></property></bean></beans>  

webapp/WEB-INF/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>user-web</display-name><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list><!-- Spring配置文件 --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></context-param><!-- 编码过滤器 --><filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><async-supported>true</async-supported><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- Spring监听器 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- 添加对springmvc的支持 --><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:spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup><async-supported>true</async-supported></servlet><servlet-mapping><servlet-name>springMVC</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping>
</web-app>

com.cy.user.controller.UserController.java:

package com.cy.user.controller;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.cy.user.entity.User;
import com.cy.user.service.UserService;@Controller
@RequestMapping("/user")
public class UserController {@Autowiredprivate UserService userService;/*** 用户登录* @param user* @param request* @return*/@RequestMapping("/login")public String login(User user,HttpServletRequest request){User resultUser=userService.login(user);if(resultUser==null){request.setAttribute("user", user);request.setAttribute("errorMsg", "用户名或密码错误!");return "index";}else{HttpSession session=request.getSession();session.setAttribute("currentUser", resultUser);return "redirect:/success.jsp";}}
}

注意上面的重定向：return "redirect:/success.jsp";

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>
<form action="${pageContext.request.contextPath }/user/login.do" method="post">userName:<input type="text" name="userName" value="${user.userName }"/><br/>password:<input type="password" name="password" value="${user.password }"><br/><input type="submit" value="login"/><font color="red">${errorMsg }</font>
</form>
</body>
</html>

success.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：${currentUser.userName }
</body>
</html>

最后访问http://localhost:8080/user-web/index.jsp进行测试；

--------