运行效果
目录结构
.
├── pom.xml
├── src
│ └── main
│ ├── java
│ │ └── com
│ │ └── robert
│ │ ├── controller
│ │ │ └── SsmController.java
│ │ ├── dao
│ │ │ └── UserMapper.java
│ │ ├── pojo
│ │ │ └── User.java
│ │ └── service
│ │ ├── UserService.java
│ │ └── impl
│ │ └── UserServiceImpl.java
│ ├── resources
│ │ ├── jdbc.properties
│ │ ├── mybatis
│ │ │ ├── mapper
│ │ │ │ └── UserMapper.xml
│ │ │ └── mybatis-config.xml
│ │ └── spring
│ │ ├── spring.xml
│ │ └── springmvc-config.xml
│ └── webapp
│ ├── WEB-INF
│ │ └── web.xml
│ ├── index.jsp
│ └── ssm.jsp
├── ssm_in_one.iml
新建一个java maven web 工程
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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.company</groupId>
<artifactId>ssm_in_one</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>ssm_in_one</name>
<!-- 集中定义依赖版本号 -->
<properties>
<junit.version>4.10</junit.version>
<spring.version>4.1.3.RELEASE</spring.version>
<mybatis.version>3.2.8</mybatis.version>
<mybatis.spring.version>1.2.2</mybatis.spring.version>
<mysql.version>5.1.32</mysql.version>
<druid.version>1.1.6</druid.version>
<slf4j.version>1.6.4</slf4j.version>
<jstl.version>1.2</jstl.version>
<servlet-api.version>2.5</servlet-api.version>
<jsp-api.version>2.0</jsp-api.version>
<jackson.version>2.4.2</jackson.version>
</properties>
<dependencies>
<!-- 单元测试 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<!-- 整合spring框架(包含springmvc) 这个jar文件包含springmvc开发时的核心类, 同时也会将依赖的相关jar文件引入进来(spring的核心jar文件也包含在内) -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!--这个jar文件包含对Spring对JDBC数据访问进行封装的所有类 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 整合mybatis框架 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!-- mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- druid连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
</dependencies>
<build>
<finalName>ssm_in_one</finalName>
</build>
</project>
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_2_5.xsd"
id="WebApp_ID" version="2.5">
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
</welcome-file-list>
<!-- 配置springmvc, 将所有请求交给springmvc来处理 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 配置springmvc核心配置文件的位置,默认Springmvc的配置文件是在WEB-INF目录下,默认的名字为springmvc-servlet.xml,如果要放在其他目录,则需要指定如下配置: -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/*.xml</param-value>
</init-param>
</servlet>
<!-- 其中的斜杠(/)表示拦截所有请求(除JSP以外), 所有请求都要经过springmvc前端控制器 -->
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 乱码处理过滤器 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<!-- 指定编码集 -->
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<!-- 指定拦截方式为截所有请求 -->
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
spring.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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/aop http://www.springframework.org/schema/aop/spring-aop-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/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
<!-- 1.加载jdbc.properties文件的位置 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 2.配置druid连接池 ,id是固定值,class是druid连接池类的全路径 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<!-- 配置连接数据库的基本信息 -->
<property name="driverClassName" value="${db.driverClassName}"></property>
<property name="url" value="${db.url}"></property>
<property name="username" value="${db.username}"></property>
<property name="password" value="${db.password}"></property>
</bean>
<!-- 3.整合spring和mybatis框架
将SqlSession等对象的创建交给Spring容器
id值(sqlSessionFactory)是固定值
-->
<bean id="sqlSessionFactory"
class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 3.1.指定mybatis核心配置文件的位置 -->
<property name="configLocation"
value="classpath:mybatis/mybatis-config.xml"></property>
<!-- 3.2.配置连接池(数据源) ref指向连接池bean对象的id值 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 3.3、扫描所有的 XxxMapper.xml映射文件,读取其中配置的SQL语句 -->
<property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"/>
</bean>
<!-- 4、定义mapper接口扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 扫描所有XxxMapper接口,将接口实例的创建交给spring容器 -->
<property name="basePackage" value="com.robert.dao"/>
</bean>
<!-- 5.配置需要扫描的包(service层):spring自动去扫描 base-package下的类,
如果扫描到的类上有 @Controller、@Service、@Component等注解,
将会自动将类注册为bean(即由spring创建实例)
-->
<context:component-scan base-package="com.robert.service">
</context:component-scan>
</beans>
springmvc-config.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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
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">
<!-- 1.配置前端控制器放行静态资源(html/css/js等,否则静态资源将无法访问) -->
<mvc:default-servlet-handler/>
<!-- 2.配置注解驱动,用于识别注解(比如@Controller) -->
<mvc:annotation-driven></mvc:annotation-driven>
<!-- 3.配置需要扫描的包:spring自动去扫描 base-package 下的类,
如果扫描到的类上有 @Controller、@Service、@Component等注解,
将会自动将类注册为bean
-->
<context:component-scan base-package="com.robert.controller">
</context:component-scan>
<!-- 4.配置内部资源视图解析器
prefix:配置路径前缀
suffix:配置文件后缀
-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
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">
<!-- MyBatis的全局配置文件 -->
<configuration >
</configuration>
jdbc.properties
db.driverClassName=com.mysql.jdbc.Driver
db.url=jdbc:mysql:///java?characterEncoding=utf-8
db.username=root
db.password=root
sql
use java;
create table user(
username varchar(30),
pwd varchar(10)
);
insert into user values("zhangsan","123456");
insert into user values("lisi","12345");
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.robert.dao.UserMapper">
<!-- 1.查询所有用户信息,id值为对应接口中方法的名字
resultType指定将查询的结果封装到哪个pojo对象中
-->
<select id="findAll" resultType="com.robert.pojo.User">
select * from User;
</select>
</mapper>
SsmController.java
package com.robert.controller;
import com.robert.pojo.User;
import com.robert.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 java.util.List;
@Controller
public class SsmController {
@Autowired
UserService userService;
@RequestMapping("/ssm")
public ModelAndView holleMVC() {
//1.调用findAll方法查询所有门店信息
List<User> list = userService.findAll();
ModelAndView mav = new ModelAndView("ssm");
// must match the jsp page name which is being requested.
mav.addObject("users", list);
mav.addObject("greeting", "GeeksForGeeks Welcomes you to Spring!");
return mav;
}
}
UserService.java
package com.robert.service;
import com.robert.pojo.User;
import java.util.List;
public interface UserService {
public List<User> findAll();
}
UserServiceImpl.java
package com.robert.service.impl;
import com.robert.dao.UserMapper;
import com.robert.pojo.User;
import com.robert.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service("userService")
public class UserServiceImpl implements UserService {
@Autowired
UserMapper usermapper;
public List<User> findAll() {
System.out.println("UserServiceImpl findAll");
//1.调用findAll方法查询所有门店信息
List<User> list = usermapper.findAll();
//2.遍历所有门店信息
for (User user : list) {
System.out.println(user);
}
return list;
}
}
User.java
package com.robert.pojo;
public class User {
private String username;
private String pwd;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
@Override
public String toString() {
return "User [username=" + username + ", pwd=" + pwd + "]";
}
}
UserMapper.java
package com.robert.dao;
import com.robert.pojo.User;
import java.util.List;
public interface UserMapper {
/**
* 1.查询所有用户信息
*/
public List<User> findAll();
}
ssm.jsp
<%@page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8" isELIgnored="false" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<h2>Hello ssm!</h2>
<h1>Start here</h1>
${greeting}
<h3>list </h3>
<c:forEach items="${requestScope.users}" var="u">
${u.username }-${u.pwd }<br/>
</c:forEach>
</body>
</html>
总结
- spring 通过IOC 和 DI ,整合spring mvc 和 mybatis,负责管理spring mvc和mybatis相关对象的创建和依赖注入
- spring mvc 来处理客户端和应用通讯,路由、view 解析等,负责实现MVC设计模式
- mybatis 负责数据持久化
ref
- https://blog.csdn.net/Yo_Macro/article/details/90548895
- https://infinitescript.com/2015/05/spring-mvc-mybatis-integration-tutorial/
- https://www.geeksforgeeks.org/spring-mvc-with-jsp-view/
- https://blog.csdn.net/qq_34638225/article/details/81261392
- https://www.bilibili.com/video/BV1hE411F77L/