场景
对于新手来说，学过Spring、SpringMVC、Mybatis，但是将其整合起来搭建项目就
比较困难。
环境
Eclipse+Mysql5.7+jdk8，没有搭建Maven项目，入门已经将需要jar包整理好。
实现
新建项目
1.打开Eclipse--File--new--Dynamic Web Project
2.输入ssmJarTemplate项目名，点击Next--Next，勾选生成web.xml
项目建成后的目录为
3.下载SSM整合所需的jar包，然后将里面的jar包复制到项目下的WEB-INF 下的lib下
SSM整合所需jar下载
https://download.csdn.net/download/badao_liumang_qizhi/10855459
数据库配置
1.新建数据库ssmtest，并新建表user
2.给User表添加字段
3.给user表添加几条数据
MVC实现
1.在ECclipse下新建MVC结构目录
业务代码实现
新建pojo
在com.badao.pojo包下新建User.java
package com.badao.pojo;
public class User {
private Integer id;
private String name;
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 Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}新建mapper
在com.badao.mapper包新建UserMapper.java（接口）
声明所需的方法，这里只声明增删改查
package com.badao.mapper;
import java.util.List;
import com.badao.pojo.User;
public interface UserMapper {
public int addUser(User user);
public User selectUser(int id);
public int updateUser(User user);
public void deleteUser(int id);
public List<User> selectAllUser();
}再在mapper包下新建UserMapper.xml
其中namespace属性要与上面所新建的接口一致
id属性要与上面所建方法名一致
<?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.badao.mapper.UserMapper">
<insert id="addUser" parameterType="User" >
insert into user ( name,age ) values (#{name},#{age})
</insert>
<delete id= "deleteUser" parameterType= "="_int" >
delete from user where id= #{id}
</delete>
<select id="selectUser" parameterType="_int" resultType="User">
select * from user where id= #{id}
</select>
<update id="updateUser" parameterType= "User"><BR> updateusersetname=#{name},age=#{age} where id=#{id}
</update>
<select id="selectAllUser" resultType="User">
select * from user
</select>
</mapper>实现Controller
在controller包下新建UserController.java
实现映射简单的请求路径listUser并简单的查询所有user，然后跳转到listUser.jsp
package com.badao.controller;
import java.util.List;
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.badao.pojo.User;
import com.badao.service.UserService;
// 告诉spring mvc这是一个控制器类
@Controller
@RequestMapping("")
public class UserController {
@Autowired
UserService userService;
@RequestMapping("listUser")
public ModelAndView listUser(){
ModelAndView mav = new ModelAndView();
List<User> cs= userService.selectAllUser();
// 放入转发参数
mav.addObject("userList", cs);
// 放入jsp路径
mav.setViewName("listUser");
return mav;
}
}实现Service
在service包下新建UserService.java（接口）
package com.badao.service;
import java.util.List;
import com.badao.pojo.User;
public interface UserService {
List<User> selectAllUser();
}再在此包下新建impl包，在impl包下新建UserServiceImpl.java作为前面service的实现lei。
package com.badao.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.badao.mapper.UserMapper;
import com.badao.pojo.User;
import com.badao.service.UserService;
@Service
public class UserServiceImpl implements UserService {
@Autowired
UserMapper userMapper;
public List<User> selectAllUser() {
// TODO Auto-generated method stub
return userMapper.selectAllUser();
}
}实现jsp页面
在WEB-INF目录下新建jsp目录，再在此目录下新建jsp目录，在jsp目录下新建
listUser.jsp
<%
pageContext.setAttribute("APP_PATH", request.getContextPath());
%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>查询所有用户</title>
</head>
<script type="text/javascript" src="${APP_PATH }/static/js/jquery-1.12.4.min.js"></script>
<link href="${APP_PATH }/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" rel="stylesheet">
<script src="${APP_PATH }/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
<body>
<table align='center' border='1' cellspacing='0' class="table table-bordered"
<th >
<td>id</td>
<td>name</td>
<td>age</td>
</th>
<c:forEach items="${userList}" var="u">
<tr class="active">
<td >${u.id}</td>
<td>${u.name}</td>
<td>${u.age}</td>
</tr>
</c:forEach>
</table>
</body>
</html>在此页面引入了bootstrap，用来显示查询到的所有user，关于怎样引入bootstrap
参照
https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/85037589
实现SSM整合配置
配置web.xml
通过ContextLoaderListener在web app启动的时候，获取contextConfigLocation配置文件的文件名applicationContext.xml，并进行Spring相关初始化工作。
有任何访问，都被DispatcherServlet所拦截。
<?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_2_5.xsd" version="2.5">
<!-- spring的配置文件-->
<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>
<!-- spring mvc核心：分发servlet -->
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- spring mvc的配置文件 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springMVC.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
Spring的配置文件applicationContext.xml
在src目录下新建applicationContext.xml
1.激活注解
<context:annotation-config />用于激活那些已经在spring容器里注册过的bean（无论是通过xml的方式还是通过package sanning的方式）上面的注解。
2.组件扫描
<context:component-scan base-package="com.badao.service" />除了具有<context:annotation-config>的功能之外，<context:component-scan>还可以在指定的package下扫描以及注册javabean 。
3.配置数据源
将用户名与密码改成自己的
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost:3306/ssmtest?characterEncoding=UTF-8</value>
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>root</value>
</property>
</bean>4.扫描存放SQL语句的UserMapper.xml
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="typeAliasesPackage" value="com.badao.pojo" />
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:com/badao/mapper/*.xml"/>
</bean>5.扫描Mapper，并将其纳入Spring的管理
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.badao.mapper"/>
</bean>6.applicationContext.xml完整代码
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:annotation-config />
<context:component-scan base-package="com.badao.service" />
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost:3306/ssmtest?characterEncoding=UTF-8</value>
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>523627</value>
</property>
</bean>
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="typeAliasesPackage" value="com.badao.pojo" />
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:com/badao/mapper/*.xml"/>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.badao.mapper"/>
</bean>
</beans>配置SpringMVC
src目录下新建SpringMVC.xml
1.开启注解驱动<mvc:annotation-driven />
会自动注册DefaultAnnotationHandlerMapping与AnnotationMethodHandlerAdapter 两个bean,是spring MVC为@Controllers分发请求所必须的。
并提供了：数据绑定支持，@NumberFormatannotation支持，@DateTimeFormat支持，@Valid支持，读写XML的支持（JAXB），读写JSON的支持（Jackson）。
2.扫描Controller,并将其生命周期纳入Spring管理
<context:component-scan base-package="com.badao.controller">
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller"/>
</context:component-scan>3.启用默认处理器，使静态资源可以访问
<mvc:default-servlet-handler />4.视图解析器
<bean
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>5.SpringMVC.xml完整代码
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<context:annotation-config/>
<context:component-scan base-package="com.badao.controller">
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<mvc:annotation-driven />
<mvc:default-servlet-handler />
<bean
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>项目目录
启动项目
将项目部署到Tomcat中，打开浏览器输入：
http://127.0.0.1:8080/ssmtest/listUser
项目下载
https://download.csdn.net/download/badao_liumang_qizhi/10856312