Spring + SpringMVC +MyBatis超详细整合(附源码)
链接:https://pan.baidu.com/s/1-9fLmKHZw3gilF6bv9ohxQ
提取码:3cds
整合SSM的jar包也在里面
步骤1 : 创建数据库和表
首先准备数据库 ssmdb
如果没有安装数据库,请安装mysql-server
创建数据库
create database ssmdb;
接着准备表Category只有2个字段id和name
use ssmdb;
CREATE TABLE category_ (
id int(11) NOT NULL AUTO_INCREMENT,
name varchar(30) ,
PRIMARY KEY (id)
) DEFAULT CHARSET=UTF8;
步骤2 : 准备数据
use ssmdb;
insert into category_ values(null,"category1");
insert into category_ values(null,"category2");
insert into category_ values(null,"category3");
insert into category_ values(null,"category4");
insert into category_ values(null,"category5");
select * from category_
步骤3: 新建项目
在eclipse中新建项目ssm_conformity,使用dynamic web project的方式。
步骤4:导入jar包
附带的源码里有这些jar包, 解压后复制到 己项目的lib目录下就行
步骤5:创建pojo
package com.lqg.pojo;
public class Category {
private int id;
private String name;
//省略getter和setter
}
步骤6:创建CategoryMapper
package com.lqg.mapper;
import java.util.List;
import com.how2java.pojo.Category;
public interface CategoryMapper {
public int add(Category category);
public void delete(int id);
public Category get(int id);
public int update(Category category);
public List<Category> list();
public int count();
}
步骤 11 : Category.xml
步骤7:创建Category.xml
Category.xml需要和CategoryMapper放在同一个包下面,并且namespace必须写CategoryMapper的完整类名
<?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.lqg.mapper.CategoryMapper">
<insert id="add" parameterType="Category" >
insert into category_ ( name ) values (#{name})
</insert>
<delete id="delete" parameterType="Category" >
delete from category_ where id= #{id}
</delete>
<select id="get" parameterType="_int" resultType="Category">
select * from category_ where id= #{id}
</select>
<update id="update" parameterType="Category" >
update category_ set name=#{name} where id=#{id}
</update>
<select id="list" resultType="Category">
select * from category_
</select>
</mapper>
步骤8:创建CategoryService
package com.lqg.service;
import java.util.List;
import com.how2java.pojo.Category;
public interface CategoryService {
List<Category> list();
}
步骤9:创建CategoryServiceImpl
CategoryServiceImpl被注解**@Service**标示为一个Service
并且装配了categoryMapper
package com.lqg.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.lqg.mapper.CategoryMapper;
import com.lqg.pojo.Category;
import com.lqg.service.CategoryService;
@Service
public class CategoryServiceImpl implements CategoryService{
@Autowired
CategoryMapper categoryMapper;
public List<Category> list(){
return categoryMapper.list();
}
}
步骤10:创建CategoryController
CategoryController被@Controller标示为了控制器
自动装配了categoryService
通过@RequestMapping映射访问路径/listCategory路径到方法listCategory()。
在listCategory()方法中,通过categoryService获取后,然后存放在"cs"这个key上。
package com.how2java.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.lqg.pojo.Category;
import com.lqg.service.CategoryService;
// 告诉spring mvc这是一个控制器类
@Controller
@RequestMapping("")
public class CategoryController {
@Autowired
CategoryService categoryService;
@RequestMapping("listCategory")
public ModelAndView listCategory(){
ModelAndView mav = new ModelAndView();
List<Category> cs= categoryService.list();
// 放入转发参数
mav.addObject("cs", cs);
// 放入jsp路径
mav.setViewName("listCategory");
return mav;
}
}
步骤11:创建web.xml
在WEB-INF目录下新增加web.xml,这个web.xml有两个作用:
-
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,这就是Spring MVC那套工作机制了。
<?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>
步骤12:创建applicationContext.xml
在src目录下新建applicationContext.xml文件,这是Spring的配置文件,其作用
- 通过注解,将Service的生命周期纳入Spring的管理
<context:annotation-config />
<context:component-scan base-package="com.how2java.service" />
- 配置数据源
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
- 扫描存放SQL语句的Category.xml
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
- 扫描Mapper,并将其生命周期纳入Spring的管理
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
5.完整的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: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.how2java.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/ssmdb?characterEncoding=UTF-8</value>
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>123456</value>
</property>
</bean>
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="typeAliasesPackage" value="com.lqg.pojo" />
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:com/lqg/mapper/*.xml"/>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.lqg.mapper"/>
</bean>
</beans>
步骤13:创建springMVC.xml
在src目录下新建springMVC.xml
- 扫描Controller,并将其生命周期纳入Spring管理
<context:annotation-config/>
<context:component-scan base-package="com.how2java.controller">
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
- 注解驱动,以使得访问路径与方法的匹配可以通过注解配置
<mvc:annotation-driven />
- 静态页面,如html,css,js,images可以访问
<mvc:default-servlet-handler />
- 视图定位到/WEB/INF/jsp 这个目录下
<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>
详细的SpringMVC.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: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.lqg.controller">
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<mvc:annotation-driven />
<mvc:default-servlet-handler />
<!-- 视图定位 -->
<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>
步骤14:创建 listCategory.jsp
在WEB-INF下创建jsp目录,并创建文件listCategory.jsp。
在这个jsp文件中,通过forEach标签,遍历CategoryController传递过来的集合数据。
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" import="java.util.*"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<table align='center' border='1' cellspacing='0'>
<tr>
<td>id</td>
<td>name</td>
</tr>
<c:forEach items="${cs}" var="c" varStatus="st">
<tr>
<td>${c.id}</td>
<td>${c.name}</td>
</tr>
</c:forEach>
</table>
步骤15:部署在tomcat中,重启测试
部署在Tomcat中,重启tomcat,然后访问地址,观察效果
思路图
- 首先浏览器上访问路径 /listCategory
- tomcat根据web.xml上的配置信息,拦截到了/listCategory,并将其交由DispatcherServlet处理。
- DispatcherServlet 根据springMVC的配置,将这次请求交由CategoryController类进行处理,所以需要进行这个类的实例化
- 在实例化CategoryController的时候,注入CategoryServiceImpl。 (自动装配实现了CategoryService接口的的实例,只有CategoryServiceImpl实现了CategoryService接口,所以就会注入CategoryServiceImpl)
- 在实例化CategoryServiceImpl的时候,又注入CategoryMapper
- 根据ApplicationContext.xml中的配置信息,将CategoryMapper和Category.xml关联起来了。
- 这样拿到了实例化好了的CategoryController,并调用 list 方法
- 在list方法中,访问CategoryService,并获取数据,并把数据放在"cs"上,接着服务端跳转到listCategory.jsp去
- 最后在listCategory.jsp 中显示数据