1.新建一个Maven project
（1）选中create a simple project,自动配置必要的文件
（2）Packaging选择war类型。jar和war的区别就是一个是普通的javaSE程序，一个是javaWEB程序。
（3）新建的项目会报错，这是因为没有web.xml文件，选中目录中Deployment Descriptor，右键单击弹出菜单，单击Generate Deployment Descriptor Stub ,生成一个部署描述符存根，既web.xml文件。
2.部署tomcat运行环境，
项目名右键—— properties —— maven/Targeted Runtimes , 选中所要部署的服务器，apply and close；
3.导入ssm框架所需要的jar包
在pom.xml文件配置，可以在Dependencies中add添加，也可以直接从阿里云的maven仓库中将路径复制过来，下面是我在项目中使用到的jar包
<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>cn.tesu</groupId>
<artifactId>StudentDemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<dependencies>
<!-- 单元测试 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
</dependency>
<!-- 三大组件的依赖jar包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>3.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>Mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.8</version>
</dependency>
<!-- jsp标准标签库 -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- json依赖的jar包 -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.2.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.2.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.2.3</version>
</dependency>
<!-- 文件上传依赖jar包 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>1.4</version>
</dependency>
<!-- aop依赖的jar包 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.0</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjtools</artifactId>
<version>1.8.0</version>
</dependency>
<!-- 下载Excel的组件 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.16</version>
</dependency>
</dependencies>
</project>
jar包导错了，会报出各种奇奇怪怪的错误，而且不好找，最好能使用经过验证确实能用的jar包来构建项目。
在构建项目的过程中出现过导错jar包，删了重导，结果jar包冲突的情况，最后是将.m2中的所有文件都删除了重新导入才解决的。
而且在更换了jdk后原先能用的项目也不可以用了，好像是版本不匹配，我将jdk8u161换成了jdk8u144才又可以用的，用161的时候总是找不到数据库连接池对象。
4.配置web.xml文件
这个文件中配置了DispatcherServlet，是处理所有前端发送过来的请求的，也是在这儿加载了所有的spring配置文件。
<?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" version="2.5"> <display-name>DAY08-01-SSM-Student</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>Spring-SpringMVC-MyBatis</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:conf/spring-*.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Spring-SpringMVC-MyBatis</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping>
<!-- 字符编码过滤器，只能解决post请求的编码问题，对于get请求不管用 -->
<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> </web-app>
5.配置数据库连接池
（1）配置db.properties文件
driver=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/user username=root password=123456 initsize=2 maxActive=10
（2）配置spring-dao.xml文件，在这个文件中主要是配置了数据库连接池
<?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:context="http://www.springframework.org/schema/context"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">
<!-- 加载db.properties配置 -->
<util:properties id="dbConfig" location="classpath:conf/db.properties"></util:properties>
<!-- 配置数据库连接池 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="#{dbConfig.driver}"></property>
<property name="url" value="#{dbConfig.url}"></property>
<property name="initialSize" value="#{dbConfig.initsize}"></property>
<property name="username" value="#{dbConfig.username}"></property>
<property name="password" value="#{dbConfig.password}"></property>
<property name="maxActive" value="#{dbConfig.maxActive}"></property>
</bean>
<!-- 配置dao接口扫描 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.tedu.store.mapper;cn.tedu.store.*.mapper" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
<!-- 配置sql会话工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mapperLocations" value="classpath:mappers/*.xml" />
</bean>
<!-- 配置spring事物管理组件 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 支持事物注解 -->
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>
（3）测试数据库连接池是否正常
import java.util.Date; import org.apache.commons.dbcp.BasicDataSource; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.junit.Test; import org.springframework.context.support.AbstractApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import cn.tedu.store.bean.User; import cn.tedu.store.mapper.UserMapper; /** * 测试dao接口 * @author Administrator * */ public class DaoTest { @Test public void testDao() { //读取配置文件 AbstractApplicationContext aac = new ClassPathXmlApplicationContext("conf/spring-dao.xml"); //获取bean对象 BasicDataSource bds = aac.getBean("dataSource",BasicDataSource.class); //测试获取的对象 System.out.println(bds.getDriverClassName().toString()); //获取一个SQL会话工厂对象 SqlSessionFactory sqlSessionFactory = aac.getBean("sqlSessionFactory",SqlSessionFactory.class); //打开session对象 SqlSession session = sqlSessionFactory.openSession(); //通过session自动创建mapper代理对象 UserMapper dao = session.getMapper(UserMapper.class); //插入一个用户对象 User user = new User("张冠", 29, "1989-08-12", new Date()); dao.addUser(user); System.out.println("插入了一个对象了"); } }
6.配置spring-mvc.xml
这个文件主要是配置了通用的注解驱动，对controller的组件扫描，以及返回的前端页面的内部资源视图解析。
<?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:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util" xmlns:jpa="http://www.springframework.org/schema/data/jpa" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd"> <context:component-scan base-package="cn.tedu.store.controller" /> <mvc:annotation-driven /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/web/"></property> <property name="suffix" value=".jsp"></property> </bean> <!-- 上传文件的处理组件 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- one of the properties available; the maximum file size in bytes --> <property name="maxUploadSize" value="50000000"/> <property name="defaultEncoding" value="utf-8"></property> </bean> </beans>
7.配置service的xml文件
<?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:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util" xmlns:jpa="http://www.springframework.org/schema/data/jpa" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd"> <context:component-scan base-package="cn.tedu.store.service" /> </beans>
8.配置dao接口的sql映射
<?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="cn.tedu.store.mapper.UserMapper"> <!-- private int userId; private String username; private Integer age; private String birthday; private Date createDate; --> <insert id="addUser" parameterType="cn.tedu.store.bean.User" useGeneratedKeys="true"> insert into User( userId,username,age,birthday,createDate) values( #{userId},#{username},#{age},#{birthday},#{createDate}); </insert> <select id="findAllUser" resultType="cn.tedu.store.bean.User"> select userId,username,age,birthday,createDate from user; </select> </mapper>
9.写bean对象的实体类
package cn.tedu.store.bean; import java.util.Date; /** * 用户的实体类 * @author Administrator * create table user( * userId int auto_increment primary key, * username varchar(20), * age int,birthday varchar(20), * createDate timestamp); */ public class User { private int userId; private String username; private Integer age; private String birthday; private Date createDate; public String getUsername() { return username; } public int getUserId() { return userId; } public void setUserId(int userId) { this.userId = userId; } public void setUsername(String username) { this.username = username; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public String getBirthday() { return birthday; } public void setBirthday(String birthday) { this.birthday = birthday; } public Date getCreateDate() { return createDate; } public void setCreateDate(Date createDate) { this.createDate = createDate; } public User() { super(); } public User(String username, Integer age, String birthday, Date createDate) { super(); this.username = username; this.age = age; this.birthday = birthday; this.createDate = createDate; } @Override public String toString() { return "User [username=" + username + ", age=" + age + ", birthday=" + birthday + ", createDate=" + createDate + "]"; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((age == null) ? 0 : age.hashCode()); result = prime * result + ((birthday == null) ? 0 : birthday.hashCode()); result = prime * result + ((createDate == null) ? 0 : createDate.hashCode()); result = prime * result + ((username == null) ? 0 : username.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) return false; User other = (User) obj; if (age == null) { if (other.age != null) return false; } else if (!age.equals(other.age)) return false; if (birthday == null) { if (other.birthday != null) return false; } else if (!birthday.equals(other.birthday)) return false; if (createDate == null) { if (other.createDate != null) return false; } else if (!createDate.equals(other.createDate)) return false; if (username == null) { if (other.username != null) return false; } else if (!username.equals(other.username)) return false; return true; } }
10，写dao层的接口
package cn.tedu.store.mapper; import java.util.List; import org.springframework.stereotype.Component; import cn.tedu.store.bean.User; /** * dao接口 * @author Administrator * */ @Component public interface UserMapper { //插入一个用户 int addUser(User user); //查询到所有的用户 List<User> findAllUser(); }
11.写service的接口和实现类
package cn.tedu.store.service; import java.util.List; import cn.tedu.store.bean.User; /** * 业务层 * @author Administrator * */ public interface UserService { /** * 查询到所有的用户 * @return */ List<User> findAllUser(); }
package cn.tedu.store.service; import java.util.List; import javax.annotation.Resource; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.stereotype.Service; import cn.tedu.store.bean.User; import cn.tedu.store.mapper.UserMapper; @Service("userService") public class UserServiceImpl implements UserService{ @Resource @Qualifier("userMapper") private UserMapper userMapper; public List<User> findAllUser() { System.out.println("业务层开始查询所有的用户了"); return userMapper.findAllUser(); } }
12.写controller实现类
package cn.tedu.store.controller; import java.util.List; import javax.annotation.Resource; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.RequestMapping; import cn.tedu.store.bean.User; import cn.tedu.store.service.UserService; /** * 用户的控制器 * @author Administrator * */ @Controller @RequestMapping("/user") public class UserController { @Resource(name="userService") private UserService userService; /** * 查询到所有的用户展示到页面上 */ @RequestMapping("/findAllUser.do") public String findAllUser(ModelMap map) { System.out.println("查询到所有的用户列表展示到页面上的控制器"); List<User> list = userService.findAllUser(); System.out.println(list); map.addAttribute("users", list); return "userList"; } }
13.写jsp页面
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!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>用户展示</title> </head> <body> <h1>用户展示</h1> <c:forEach items="${users }" var="user"> <tr> <td>${user.userId }</td> <td>${user.username }</td> <td>${user.age }</td> <td>${user.birthday }</td> <td>${user.createDate }</td> <td><a href="#">删除</a></td> <td><a href="#">修改</a></td> </tr> <br> </c:forEach> </body> <!-- 引入jQuery框架 --> <script src="js/jquery-3.1.1.min.js"></script> </html>