SSM整合

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1、导包：（WEB-INF中新建lib）

Spring+SpringMVC+MyBatis+Mybatis-spring整合包

AOP联盟+织入+c3p0数据库连接池+MySQL连接驱动+jstl

2、配置SpringMVC：

①配置文件：（在项目下新建一个config目录，右键点击，找到Mark Directory as -->Test Resources Root）

②在新建的config下配置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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-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/context
      http://www.springframework.org/schema/context/spring-context-3.2.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
      http://www.springframework.org/schema/tx
      http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">

    <!-- 1.配置注解扫描位置 -->
    <context:component-scan base-package="com.hwt.backoffice.web.controller" />


    <!-- 2.配置注解处理映射-->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
    <!--3.配置适配器-->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>
    <!-- 4.配置springmvc视图解析器 视图解析器解析的视频路径为：前缀 + 后缀 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

③在web.xml中配置加载SpringMvc：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <!-- 配置：所有请求由SpringMVC管理 -->
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 3.0的springmvc 默认加载WEB-INF下的dispatcher-servlet.xml文件 3.2的springmvc
            加载DispatcherServlet-servlet.xml文件 -->
        <init-param>
            <!-- 修改默认springmvc加载的配置文件路径 -->
            <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>DispatcherServlet</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

</web-app>

④在src下创建controller（src下新建com.hwt.backoffice.web.controller包，里面建立测试UserController）

package com.hwt.backoffice.web.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/user")
public class UserController {
    @RequestMapping("/list")
    public String list(){
        return "user/list";
    }
}

⑤在WEB-INF下创建views包（案例中：在views下新建user包，user包里新建list.jsp页面）

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>用户列表</title>
</head>
<body>
<h1>这里是用户列表页面！</h1>
</body>
</html>

⑥测试截图：

3、配置MyBatis（Dao层）：

①将自己的数据库通过逆向工程生成的mapper包和model包复制放入src下com.hwt.backoffice包下，注意：修改mapper中各个xml文件中包的名字，可用快捷全局替换：ctrl+shift+r

可以根据自己需求在mapper中添加自己需要的方法。

4、配置MyBatis（Service层）：

①在src下的com.hwt.backoffice包下新建service包，包下新建接口和实现类

ItemsService接口：

package com.hwt.backoffice.service;

import com.hwt.backoffice.model.Items;

import java.util.List;

public interface ItemsService {
    public List<Items> findAllItems();
    public Items findById(Integer id);
    public void saveOrUpdate(Items items);
    public void deleteById(Integer id);
}

service下新建impl包，里面写实现类ItemsServiceImpl:

package com.hwt.backoffice.service.impl;

import com.hwt.backoffice.mapper.ItemsMapper;
import com.hwt.backoffice.model.Items;
import com.hwt.backoffice.service.ItemsService;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.List;

public class ItemsServiceImpl implements ItemsService {
    @Autowired
    private ItemsMapper itemsMapper;

    @Override
    public List<Items> findAllItems() {
        return itemsMapper.findAllItems();
    }

    @Override
    public Items findById(Integer id) {
        return itemsMapper.selectByPrimaryKey(id);
    }

    @Override
    public void saveOrUpdate(Items items) {
        if (items.getId()==null){
            itemsMapper.insert(items);
        }else{
            itemsMapper.updateByPrimaryKey(items);
        }
    }

    @Override
    public void deleteById(Integer id) {
        itemsMapper.deleteByPrimaryKey(id);
    }

}
package com.hwt.backoffice.service.impl;

import com.hwt.backoffice.mapper.ItemsMapper;
import com.hwt.backoffice.model.Items;
import com.hwt.backoffice.service.ItemsService;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.List;

public class ItemsServiceImpl implements ItemsService {
    @Autowired
    private ItemsMapper itemsMapper;

    @Override
    public List<Items> findAllItems() {
        return itemsMapper.findAllItems();
    }

    @Override
    public Items findById(Integer id) {
        return itemsMapper.selectByPrimaryKey(id);
    }

    @Override
    public void saveOrUpdate(Items items) {
        if (items.getId()==null){
            itemsMapper.insert(items);
        }else{
            itemsMapper.updateByPrimaryKey(items);
        }
    }

    @Override
    public void deleteById(Integer id) {
        itemsMapper.deleteByPrimaryKey(id);
    }

}

②在config里面创建mybatis的配置文件mybatis.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>
    <!-- 别名配置 -->
    <typeAliases>
        <!-- 批量配置别名：指定批量定义别名的类包，别名为类名（首字母大小写都可） -->
        <package name="com.hwt.backoffice.model"/>
    </typeAliases>
    <mappers>
        <!-- 批量加载映射文件 -->
        <package name="com.hwt.backoffice.mapper"/>
    </mappers>
</configuration>

③在config中创建spring的配置文件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:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/aop
		http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
		http://www.springframework.org/schema/tx
		http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">

    <context:property-placeholder location="classpath:db.properties"/>

    <!-- 配置数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="2"/>
    </bean>
    <!-- 配置sessionFactory -->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- 指定配置文件位置 -->
        <property name="configLocation" value="classpath:mybatis.xml"/>
    </bean>

    <!-- 自动生成dao,mapper-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.hwt.backoffice.mapper"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryBean"/>
    </bean>

    <!--自动扫描Service-->
    <context:component-scan base-package="com.hwt.backoffice"/>

</beans>

④在config下创建db.properties：

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis_study01
jdbc.username=root
jdbc.password=root

⑤在web.xml中配置Spring：

    <!--配置Spring-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <!--监听器-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

到这里，一个完整的ssm项目框架就搭建完成了，后面就可以发挥你的才能，尽情的搬砖了~~~~~~~~~~~~~~

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