版权声明：@渔闻520 https://blog.csdn.net/weixin_41060905/article/details/87283610
项目的整体目录：
1.在idea中新建spring-->spring MVC项目，lib可以是下载也可以是本地的。如果选择下载，在ssm整合时要加入相应的spring包和MyBatis包，MyBatis-spring包。注意，新建立成的项目的lib文件夹是在src目录下，要在program structure中将其加入到web-info下的lib文件夹中，关于具体的操作，请移步：https://blog.csdn.net/weixin_41060905/article/details/86911172，这里面还降到在idea下包的导入方法。
2.创建好后，IDea会自动帮我们生成web.xml中的内容配置，applicationContext.xml，dispatcher-servlet.xml。其中applicationContext.xml是关于其结合spring和MyBatis的；而dispatcher-servlet.xml是springMVC的配置文件。
3.配置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:tx="http://www.springframework.org/schema/tx" 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-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/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!--使用注解驱动-->
<context:annotation-config/>
<!--连接数据库-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.SimpleDriverDataSource">
<property name="username" value="root"/>
<property name="password" value="00000"/>
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/ssm"/>
</bean>
<!--集成MyBatis-->
<bean id="SqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:com/ssm/chapter14/mybatis/mybatis-config.xml"/>
</bean>
<!--配置数据源事务管理器-->
<bean id="transactionManger" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--采用自动扫描方式创建mapper bean-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.ssm.chapter14"/>
<property name="sqlSessionFactoryBeanName" value="SqlSessionFactory"/>
<property name="annotationClass" value="org.springframework.stereotype.Repository"/>
</bean>
</beans>4.配置dispatcher-servlet.xml(即springMVC的配置文件）
<?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:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx" 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-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/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- 使用注解驱动 -->
<mvc:annotation-driven />
<!-- 定义扫描装载的包 -->
<context:component-scan base-package="com.*" />
<!-- 定义视图解析器 -->
<!-- 找到Web工程/WEB-INF/JSP文件夹，且文件结尾为jsp的文件作为映射 -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
<!--开启数据库事务管理-->
<tx:annotation-driven transaction-manager="transactionManger"/>
</beans>5.创建pojo对象：略；
6.创建dao：RoleDao：
@Repository
public interface RoleDao {
public Role getRole(long id);
}7.创建mapper：RoleMapper.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.ssm.chapter14.dao.RoleDao">
<select id="getRole" parameterType="long" resultType="com.ssm.chapter14.pojo.Role">
select id, role_name as roleName, note from t_role where id = #{id}
</select>
</mapper>8.配置MyBatis的配置文件：mybatis-config.xml：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 指定映射器路径 -->
<mappers>
<mapper resource="com/ssm/chapter14/mapper/RoleMapper.xml" />
</mappers>
</configuration>9.编写业务代码：
RoleService:
package com.ssm.chapter14.service;
import com.ssm.chapter14.pojo.Role;
public interface RoleService {
public Role getRole(long id);
}
RoleServiceImpl:
@Service
public class RoleServiceImpl implements RoleService {
@Autowired
private RoleDao roleDao=null;
@Override
@Transactional(isolation = Isolation.READ_COMMITTED,propagation = Propagation.REQUIRED)
public Role getRole(long id) {
return roleDao.getRole(id);
}
}10:编写Controller：
@Controller
@RequestMapping("/role")
public class RoleController {
@Autowired
private RoleService roleService=null;
@RequestMapping(value = "/getRole",method = RequestMethod.GET)
public ModelAndView getRole(@Param("id") long id){
Role role = roleService.getRole(id);
ModelAndView mv = new ModelAndView();
mv.setViewName("roleDetails");
mv.addObject("role",role);
return mv;
}
}这里仅仅允许介绍get提交的数据：
mv的对象加入role对象。由于这样配置，springmvc会用jstlview进行渲染，也就是会将查询到的数据绑定到jstl模型中，这样通过jstl就可以把数据模型在jsp中读出展示数据了。注意，使用jstl标签库要导入相应的包。
11：RoleDetails.jsp:
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>out标签的使用</title>
</head>
<body>
<center>
<table border="1">
<tr>
<td>标签</td>
<td>值</td>
</tr>
<tr>
<td>角色编号</td>
<td><c:out value="${role.id}"/></td>
</tr>
<tr>
<td>角色名称</td>
<td><c:out value="${role.roleName}"/></td>
</tr>
<tr>
<td>角色备注</td>
<td><c:out value="${role.note}"/></td>
</tr>
</table>
</center>
</body>
</html>
12.运行部署，在浏览器中输入：http://localhost:8080/Chapter14/role/getRole.form?id=4，即可。