maven搭建Spring+SpringMVC的应用

一（what）什么是maven
maven:是项目管理的一个构建工具，通过一些【简单的描述信息】来管理项目的构建，报告，文档等的软件项目管理工具
二（why）为什么使用maven
按照传统的开发方式，在一开始，我们往往得找到一些jar包，难免不了jar包的冲突，而采用maven直不在考虑jar包的问题，只需要加入一些【简单的描述信息】即可
三（how）怎么使用用maven开发

1，File->New->Project…->Maven->(选择SDK)New->Next->填写GroupID(项目的包名),ArtifactId(模块名),版本默认即可->next->Project name（项目名字），路径->finish
结果如图所示：

,
2，view->Tool Windows->maven Project

3选中(如图所示，再运行，刷新)
maven就会到远程中心仓库下载所有依赖的jar包

这样就可以了，接着就是建包撸码了。。。
*采用Spring+springmvc框架，简单的验证用户登录问题

工程目录如下所示：

第一步建数据库

drop database springmvc;create database springmvc;use springmvc;create table userTable(id int primary key auto_increment,username varchar(10),password varchar(10));insert into  userTable values(1,"wby","123456");

第二步建实体类
（属性注意和数据表字段相对应）

package com.wby.entity;/** * Created by Administrator on 2017/11/20. */public class User {    private int id;    private String username;    private String password;    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    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;    }}

第三步编写dao层
采用spring jdbcTemplate操作数据库

package com.wby.dao;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.jdbc.core.JdbcTemplate;import org.springframework.stereotype.Repository;/** * Created by Administrator on 2017/11/20. */@Repositorypublic class UserDao {    @Autowired    private JdbcTemplate jdbcTemplate;    public  int getCount(String username,String password){        String sql="select count(*) from userTable "+"where username=? and password=?";        return jdbcTemplate.queryForObject(sql, new Object[]{username, password}, Integer.class);    }}

第四步编写service层

package com.wby.service;import com.wby.entity.User;import com.wby.dao.UserDao;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;/** * Created by Administrator on 2017/11/20. */@Servicepublic class UserService {    @Autowired    UserDao userDao;   public int getCount(User user){      return  userDao.getCount(user.getUsername(),user.getPassword() );   }}

第五部编写controller层

```package com.wby.controller;import com.wby.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.ModelAndView;import com.wby.entity.User;//import com.wby.service.UserService;import javax.servlet.http.HttpServletRequest;/** * Created by Administrator on 2017/11/20. */@Controllerpublic class UserController {    @Autowired    UserService userService;@RequestMapping("/index.html")    public ModelAndView Check(HttpServletRequest request,User user){       int a= userService.getCount(user);       if(a>0) {           request.getSession().setAttribute("user",user);           return new ModelAndView("main");       }       else           return new ModelAndView("index","error","用户名或者密码有误");    }}

六spring框架的配置文件applicationContext.xml
配置数据源，jdbcTemplate,，数据管理器，事物增强…

<?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:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="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/tx        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd       http://www.springframework.org/schema/aop       http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">    <!-- 扫描类包，将标注Spring注解的类自动转化Bean，同时完成Bean的注入 -->    <context:component-scan base-package="com.wby.dao"/>    <context:component-scan base-package="com.wby.service"/>    <!-- 配置数据源 --><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"destroy-method="close" p:driverClassName="com.mysql.jdbc.Driver"p:url="jdbc:mysql://localhost:3306/springmvc"p:username="root"p:password="root" /><!-- 配置Jdbc模板  --><bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"p:dataSource-ref="dataSource" /><!-- 配置事务管理器 --><bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager"p:dataSource-ref="dataSource" /><!-- 通过AOP配置提供事务增强，让service包下所有Bean的所有方法拥有事务 --><aop:config proxy-target-class="true"><aop:pointcut id="serviceMethod"expression="(execution(* com.wby.service..*(..))) and (@annotation(org.springframework.transaction.annotation.Transactional))" /><aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice" /></aop:config><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="*" /></tx:attributes></tx:advice></beans>

七springmvc框架的配置文件springmvc.xml

配置视图解析器，前缀后缀的设定
springmvc的默认配置文件是放在WEB-INF下的，叫action-servlet.xml
想改在resources下，那么就得修改web.xml下的分发器的servlet

<?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"xsi:schemaLocation="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"><!-- 扫描web包，应用Spring的注解 --><context:component-scan base-package="com.wby.controller"/><!-- 配置视图解析器，将ModelAndView及字符串解析为具体的页面 --><beanclass="org.springframework.web.servlet.view.InternalResourceViewResolver"p:prefix="/WEB-INF/jsp/"p:suffix=".jsp" /></beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><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的默认配置文件是放在WEB-INF下的，叫action-servlet.xml想改在resources下，那么就得修改web.xml下的分发器的servlet，具体如下：--><servlet><servlet-name>action</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></servlet><servlet-mapping><servlet-name>action</servlet-name><url-pattern>*.html</url-pattern></servlet-mapping></web-app>

pom.xm（在pom.xnl文件中配上坐标，maven就会去远程仓库中下载相应的jar包，这就是前面所提及的一小段配置信息）

<?xml version="1.0" encoding="UTF-8"?><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/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.wby</groupId>    <artifactId>demo1</artifactId>    <version>1.0-SNAPSHOT</version>    <packaging>war</packaging>    <properties>        <file.encoding>UTF-8</file.encoding>        <spring.version>4.2.2.RELEASE</spring.version>        <mysql.version>5.1.29</mysql.version>        <servlet.version>3.0-alpha-1</servlet.version>        <aspectj.version>1.8.1</aspectj.version>        <commons-codec.version>1.9</commons-codec.version>        <commons-dbcp.version>1.4</commons-dbcp.version>        <hibernate.validator.version>5.0.2.Final</hibernate.validator.version>        <jetty.version>8.1.8.v20121106</jetty.version>        <slf4j.version>1.7.5</slf4j.version>        <testng.version>6.8.7</testng.version>    </properties>    <dependencies>        <!-- spring 依赖-->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-beans</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context-support</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>commons-dbcp</groupId>            <artifactId>commons-dbcp</artifactId>            <version>${commons-dbcp.version}</version>        </dependency>        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>${mysql.version}</version>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>servlet-api</artifactId>            <version>${servlet.version}</version>            <scope>provided</scope>        </dependency>        <dependency>            <groupId>org.aspectj</groupId>            <artifactId>aspectjweaver</artifactId>            <version>${aspectj.version}</version>        </dependency>        <dependency>            <groupId>org.testng</groupId>            <artifactId>testng</artifactId>            <version>${testng.version}</version>            <scope>test</scope>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-test</artifactId>            <version>${spring.version}</version>            <scope>test</scope>        </dependency>        <dependency>            <groupId>org.codehaus.cargo</groupId>            <artifactId>cargo-core-api-container</artifactId>            <version>1.2.3</version>        </dependency>    </dependencies>    <build>        <plugins>            <!-- jetty插件 -->            <plugin>                <groupId>org.mortbay.jetty</groupId>                <artifactId>maven-jetty-plugin</artifactId>                <version>6.1.25</version>                <configuration>                    <connectors>                        <connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">                            <port>8000</port>                            <maxIdleTime>60000</maxIdleTime>                        </connector>                    </connectors>                    <contextPath>/bbs</contextPath>                    <scanIntervalSeconds>0</scanIntervalSeconds>                </configuration>            </plugin>            <plugin>             <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-surefire-plugin</artifactId>                <version>2.17</version>                <configuration>                    <parallel>methods</parallel>                    <threadCount>10</threadCount>                </configuration>            </plugin>        </plugins>    </build></project>

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head>    <title>Title</title></head><body>  <form action="/index.html" method="post">     用户名 <input type="text" name="username">      密码<input type="text" name="password">      <input type="submit" value="提交">  </form>  </body></html>

main.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title></title></head><body>当前用户为${user.username};</body></html>

运行测试
输入
1


2