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动机
使用maven已经有一段时间了，但项目是别人搭建好的，因此一直想着自己要学习搭建一下。网上找了些资料后，结合自己实验，花了点时间就搞好，老样子，写在博客上，免得日后忘记。
本文链接：http://blog.csdn.net/v123411739/article/details/50742885
博文中的MyEclipse链接：https://pan.baidu.com/s/1pMhiygz 密码：mqmc
博文中的完整项目代码：https://pan.baidu.com/s/1mjsJNz6 密码：saqe
如果地址失效了，可以在文章下留言或者公众号给我发消息，我看到后会及时更新。
注：文末有直接导入项目的方法。
1.安装maven和配置（此步骤并非必须，可以根据情况选择）
- 进入官网下载中心http://maven.apache.org/download.cgi，下载apache-maven-3.5.2-bin.zip，**-src.zip为Maven的源码
- 配置环境变量，打开系统环境变量新建一个M2_HOME将解压后的Maven存放路径放在此，然后在path路径加入%M2_HOME%\bin路径
- 检测是否配置成功，打开命令行输入echo %M2_HOME%查看M2_HOME指向的Maven存放安装目录是否正确，输入mvn -v查看是否能找到正确的mvn执行脚本
- 以后升级的话将M2_HOME的路径换为最新的安装目录就行
- Maven实践：初次安装完后输入mvn help:system的命令，此时会打印出所有的Java系统属性和环境变量，然后Maven会执行一个真正的任务将相应的所需的构件下载到本地仓库中包括pom和jar文件，然后用户在C:\Users\Administrator\.m2下就能看到本地仓库了
- 用户需要复制M2_HOME/conf/setting.xml文件到C:/Users/Administrator/.m2/setting.xml，这样用户每次升级后就不要在次修改setting.xml文件了
2.MyEclipse配置Maven
- 在本地创建一个文件夹MavenRepository，并在MavenRepository文件夹下创建文件夹repository。
- 进入Maven解压后的文件夹，进入conf文件夹，将settings.xml文件复制到上一步创建的MavenRepository文件夹下
- 打开MavenRepository文件夹下的settings.xml文件，找到localRepository标签，此时是被注释掉的，我们解除注释，然后配置步骤1中的repository路径，如<localRepository>F:\m2\repository</localRepository>
- 在MyEclipse中的Perferences进行如下配置，添加自己的Maven
- User Settings设置为之前修改过的setting.xml
- File->New->others，搜索maven，如果看到有Maven Project则代表配置成功。
3.MyEclipse使用maven创建web项目
1、创建一个maven项目
2、按照上面教程，即可创建出一个Maven项目，项目结构如下图
3、将JRE版本设置为1.7，可使用默认的或者自己导入
4、此时index.jsp会报以下错误
在pom.xml文件的dependencies节点下添加如下代码即可，添加完后，会下载对应的jar包
5、右键项目，选择Properties，进行如下配置
4.搭建Spring+SpringMVC+Mybatis框架
1、Maven引入项目用到的jar包，修改pom.xml后保存会自动下载，存放在之前配置的本地仓库中，即：F:\m2\repository文件夹
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.chillax</groupId><artifactId>Maven_Project</artifactId><packaging>war</packaging><version>0.0.1-SNAPSHOT</version><name>Maven_Project Maven Webapp</name><url>http://maven.apache.org</url><!-- 用来设置版本号 --><properties><spring.version>4.0.2.RELEASE</spring.version><mybatis.version>3.2.8</mybatis.version><slf4j.version>1.7.12</slf4j.version><log4j.version>1.2.17</log4j.version></properties><!-- 用到的jar包 --><dependencies><!-- 单元测试 --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><!-- 表示开发的时候引入，发布的时候不会加载此包 --><scope>test</scope></dependency><!-- java ee包 --><dependency><groupId>javax</groupId><artifactId>javaee-api</artifactId><version>7.0</version></dependency><!-- spring框架包 start --><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-oxm</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>${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-expression</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-orm</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>${spring.version}</version></dependency><!-- spring框架包 end --><!-- mybatis框架包 start --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>${mybatis.version}</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.2.2</version></dependency><!-- mybatis框架包 end --><!-- 数据库驱动 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.35</version></dependency><!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 --><dependency><groupId>commons-dbcp</groupId><artifactId>commons-dbcp</artifactId><version>1.4</version></dependency><!-- jstl标签类 --><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId><version>1.1.2</version></dependency><!-- log start --><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>${log4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>${slf4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>${slf4j.version}</version></dependency><!-- log END --><!-- Json --><!-- 格式化对象，方便输出日志 --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.6</version></dependency><dependency><groupId>org.codehaus.jackson</groupId><artifactId>jackson-mapper-asl</artifactId><version>1.9.13</version></dependency><!-- 上传组件包 start --><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.1</version></dependency><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.4</version></dependency><dependency><groupId>commons-codec</groupId><artifactId>commons-codec</artifactId><version>1.10</version></dependency><!-- 上传组件包 end --><!-- AL相关添加 --><dependency><groupId>net.sourceforge.jexcelapi</groupId><artifactId>jxl</artifactId><version>2.6</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.8</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.9</version></dependency><!-- AL相关添加 --></dependencies><build><finalName>Maven_Project</finalName><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>2.3.2</version><configuration><source>1.7</source><target>1.7</target></configuration></plugin></plugins></build>
</project>
2、在src/main/resources下添加如下配置文件
applicationContext.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-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"><!-- 使用注解式注入 --><context:annotation-config /><!-- 自动扫描 --><context:component-scan base-package="com.chillax" /><!-- 导入DAO配置 --><import resource="spring-dao.xml"/><!-- 导入数据库配置 --><import resource="spring-db.xml"/><!-- 导入数据库配置 --><import resource="spring-tx.xml"/></beans>
jdbc.properties，有多人反映直接复制时，第一行的driver最后面多了个空格，请注意
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/maventest
username=root
password=root
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000
log4j.properties
#定义LOG输出级别
log4j.rootLogger=INFO,Console,File
#定义日志输出目的地为控制台
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
#可以灵活地指定日志输出格式，下面一行是指定具体的格式
log4j.appender.Console.layout = org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n#文件大小到达指定尺寸的时候产生一个新的文件
log4j.appender.File = org.apache.log4j.RollingFileAppender
#指定输出目录
log4j.appender.File.File = logs/ssm.log
#定义文件最大大小
log4j.appender.File.MaxFileSize = 10MB
# 输出所以日志，如果换成DEBUG表示输出DEBUG以上级别日志
log4j.appender.File.Threshold = ALL
log4j.appender.File.layout = org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n
spring-dao.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-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"><!-- DAO接口所在包名，Spring会自动查找其下的类 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!--basePackage指定要扫描的包，在此包之下的映射器都会被搜索到。可指定多个包，包与包之间用逗号或分号分隔--><property name="basePackage" value="com.chillax.dao" /><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property></bean> </beans>
spring-db.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-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"><!-- 引入配置文件 --><bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="location" value="classpath:jdbc.properties" /></bean><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"><property name="driverClassName" value="${driver}" /><property name="url" value="${url}" /><property name="username" value="${username}" /><property name="password" value="${password}" /><!-- 初始化连接大小 --><property name="initialSize" value="${initialSize}"></property><!-- 连接池最大数量 --><property name="maxActive" value="${maxActive}"></property><!-- 连接池最大空闲 --><property name="maxIdle" value="${maxIdle}"></property><!-- 连接池最小空闲 --><property name="minIdle" value="${minIdle}"></property><!-- 获取连接最大等待时间 --><property name="maxWait" value="${maxWait}"></property></bean><!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource" /><!-- 自动扫描mapping.xml文件 --><property name="mapperLocations" value="classpath:com/chillax/mapper/*.xml"></property></bean></beans>
spring-tx.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:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-3.1.xsd"><!-- (事务管理)transaction manager, use JtaTransactionManager for global tx --><bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean><!-- 配置参与事务的类 --><aop:config><aop:pointcut id="allServiceMethod" expression="execution(* com.chillax.service.*.*(..))"/><aop:advisor pointcut-ref="allServiceMethod" advice-ref="TxAdvice" /></aop:config><!-- 使用声明方式配置事务 --><tx:advice id="TxAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="*" propagation="REQUIRED" rollback-for="java.lang.Exception"/></tx:attributes></tx:advice></beans>
3、在WEB-INF文件夹下添加/修改以下配置文件
spring-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: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-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"><!-- 添加注解驱动 --> <mvc:annotation-driven /><mvc:default-servlet-handler/><!-- 设置使用注解的类所在的包 --><context:component-scan base-package="com.chillax.controller" /><!-- 定义跳转的文件的前后缀 ，视图模式配置--><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址 --><property name="prefix" value="/WEB-INF/jsp/" /><property name="suffix" value=".jsp" /></bean><!-- SpringMVC上传文件时，需要配置MultipartResolver处理器--><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 默认编码 --><property name="defaultEncoding" value="utf-8" /> <!-- 文件大小最大值 --><property name="maxUploadSize" value="10485760000" /> <!-- 内存中的最大值 --><property name="maxInMemorySize" value="40960" /> </bean> </beans>
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_3_0.xsd"version="3.0"><display-name>Archetype Created Web Application</display-name><welcome-file-list><welcome-file>/index.jsp</welcome-file></welcome-file-list><!-- 加载spring bean --><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><!-- 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 MVC servlet --><servlet><servlet-name>SpringMVC</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/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>/</url-pattern></servlet-mapping></web-app>
4、在src/main/java下添加如下包和类
UserController.java
package com.chillax.controller;import java.util.List;import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;import com.chillax.dto.User;
import com.chillax.service.IUserService;@Controller
@RequestMapping("/user")
public class UserController {@Resourceprivate IUserService userService;@RequestMapping("/userList")public String userList(HttpServletRequest request,Model model){List<User> uList = userService.getAllUser();model.addAttribute("uList", uList);return "userList";}@RequestMapping("/showUser")public String showUser(HttpServletRequest request,Model model){int userId = Integer.parseInt(request.getParameter("id"));User user = userService.getUserById(userId);model.addAttribute("user", user);return "showUser";}@RequestMapping("/addUserUI")public String addUserUI(){return "addUser";}@RequestMapping("/addUser")public String addUser(HttpServletRequest request,Model model){User user = new User();user.setName(String.valueOf(request.getParameter("name")));user.setPassword(String.valueOf(request.getParameter("password")));user.setAge(Integer.parseInt(String.valueOf(request.getParameter("age"))));userService.addUser(user);return "redirect:/user/userList";}
}
IUserDao.java
package com.chillax.dao;import java.util.List;
import java.util.Map;import com.chillax.dto.User;public interface IUserDao {public User queryByPrimaryKey(Integer id);public List<User> getAllUser();public void insertUser(User user);public void insertUserByBatch(List<User> list);public void deleteByPrimaryKey(Integer id);public void delteUserByBatch(Map<String,Object> params);public void updateByPrimaryKey(User user);}
User.java
package com.chillax.dto;public class User {private Integer id;private String name;private String password;private Integer age;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password == null ? null : password.trim();}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}
}
UserMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.chillax.dao.IUserDao" > <resultMap id="BaseResultMap" type="com.chillax.dto.User"><result column="id" property="id" jdbcType="INTEGER" /><result column="name" property="name" jdbcType="VARCHAR" /><result column="password" property="password" jdbcType="VARCHAR" /><result column="age" property="age" jdbcType="INTEGER" /></resultMap><sql id="Base_Column_List">id, name, password, age</sql><!-- 查询用户--><select id="queryByPrimaryKey" resultMap="BaseResultMap"parameterType="java.lang.Integer">select<include refid="Base_Column_List" />from userwhere id = #{id,jdbcType=INTEGER}</select><!-- 查询用户--><select id="getAllUser" resultMap="BaseResultMap">select<include refid="Base_Column_List" />from user</select><!-- 插入用户 --><insert id="insertUser" parameterType="com.chillax.dto.User">insert into user <trim prefix="(" suffix=")" suffixOverrides="," > <if test="id != null" > id, </if> <if test="name != null" > name, </if> <if test="password != null" > password, </if> <if test="age != null" > age, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="id != null" > #{id,jdbcType=INTEGER}, </if> <if test="name != null" > #{name,jdbcType=VARCHAR}, </if> <if test="password != null" > #{password,jdbcType=VARCHAR}, </if> <if test="age != null" > #{age,jdbcType=INTEGER}, </if> </trim> </insert><!-- 批量插入用户 --><insert id="insertUserByBatch" parameterType="java.util.List" >insert into USER(ID,NAME,PASSWORD,AGE)select A.* from(<foreach collection="list" item="user" index="index" separator="union">select #{user.id,jdbcType=INTEGER},#{user.name,jdbcType=VARCHAR},#{user.password,jdbcType=VARCHAR},#{user.age,jdbcType=INTEGER}from dual</foreach>) A</insert><!-- 删除用户 --><delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">delete from userwhere id = #{id,jdbcType=INTEGER} </delete><!-- 批量删除用户 --><delete id="deleteUserByBatch" parameterType="java.util.Map" >delete from userwhere id IN <foreach item="ids" collection="iList" open="(" separator="," close=")">#{ids,jdbcType=DECIMAL}</foreach></delete><!-- 更新用户 --><update id="updateByPrimaryKey" parameterType="com.chillax.dto.User" > update user <set > <if test="name != null" > name = #{name,jdbcType=VARCHAR}, </if> <if test="password != null" > password = #{password,jdbcType=VARCHAR}, </if> <if test="age != null" > age = #{age,jdbcType=INTEGER}, </if> </set> where id = #{id,jdbcType=INTEGER} </update></mapper>
IUserService.java
package com.chillax.service;import java.util.List;import com.chillax.dto.User;public interface IUserService {public User getUserById(int userId);public void insertUser(User user);public void addUser(User user);public List<User> getAllUser();
}
UserServiceImpl.java
package com.chillax.service.Impl;import java.util.List;import javax.annotation.Resource;import org.springframework.stereotype.Service;import com.chillax.dao.IUserDao;
import com.chillax.dto.User;
import com.chillax.service.IUserService;@Service("userService")
public class UserServiceImpl implements IUserService {@Resourceprivate IUserDao userDao;public User getUserById(int userId) {return userDao.queryByPrimaryKey(userId);}public void insertUser(User user) {userDao.insertUser(user);}public void addUser(User user) {userDao.insertUser(user);}@Overridepublic List<User> getAllUser() {return userDao.getAllUser();}}
5、在WEB-INF文件夹下创建jsp文件夹，并添加userList.jsp，showUser.jsp、addUser.jsp
userList.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><base href="<%=basePath%>"><title>My JSP 'showUser.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><c:forEach items="${uList }" var="u">用户名称：${u.name}用户年龄：${u.age }<br/></c:forEach></body>
</html>
addUser.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><base href="<%=basePath%>"><title>My JSP 'addUser.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body><form id="addUser" action="user/addUser" method="post"> userName: <input id="name" name="name" /><br/> password: <input id="password" name="password" /><br/> age: <input id="age" name="age"/><br/> <input type="submit" value="添加新用户"/> </form></body>
</html>
showUser.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><base href="<%=basePath%>"><title>My JSP 'showUser.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--></head><body>${user.name }<br></body>
</html>
6、创建数据库，并创建表
create database maventest;
use maventest;CREATE TABLE `user` (`id` int(12) NOT NULL AUTO_INCREMENT,`name` varchar(50) NOT NULL,`password` varchar(50) NOT NULL,`age` int(9) NOT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8;insert into `user`(`id`,`name`,`password`,`age`) values (1,'admin','admin',22);
7、整个项目文件结构图
8、部署发布项目，进行测试
至此，框架搭建完成。
5.常见问题
问题1：pom.xml文件里的代码到哪里找？
解答：http://www.mvnrepository.com/
问题2：新建MAVEN项目过程中，出现下图错误？
解决：在MyEclipse的安装目录找到myeclipse.ini，将分配的堆内存加大
问题3：新建完工程后出现以下错误？
解答：在pom.xml添加以下代码即可，添加完代码就会自动下载好jar包
问题4：修改pom.xml时出现以下错误？
解答：这是由于jar包没有正确下载导致的，找到错误的jar包位置，将文件夹里的文件删掉，将pom.xml里该jar包的配置代码删除后再重新写上，让MAVEN重新下载jar包即可。
问题5：出现以下错误？
解答：
问题6：出现以下错误？
解答：将项目的jre版本换成1.7或者以上的版本即可
问题7：出现以下错误，并且已经确定jre是1.7版本或者以上版本。
解答：在pom.xml文件的<build></build>的标签中加入以下代码，然后Update Project（参照问题5）
<build><finalName>Maven_Project</finalName><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>2.3.2</version><configuration><source>1.7</source><target>1.7</target></configuration></plugin></plugins>
</build>
问题8：访问报错
解答：请确认地址中的项目，跟项目中的Web Context-root地址一致。
问题9：直接导入代码报错
解答：如果想直接导入代码需要先做文章开头的1和2两步，即用一个自己的新的仓库来存储jar包，不然容易跟已有的仓库配置冲突，导致jar包无法下载或下载不全。下图是我导入的过程，下载jar的过程比较慢，并且下载完了还报错，但是报错并不影响项目的正确运行。
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