SpringMVC、Spring、Mybatis框架整合及使用

1. 首先需要创建一个动态web工程
2. 引入所需的jar包

   

3.  

   创建所需要的数据库表，并插入数据

　　　　　　

CREATE DATABASE how2java;
USE how2java;
 
CREATE TABLE category_ (
  id INT(11) NOT NULL AUTO_INCREMENT,
  NAME VARCHAR(30) ,
  PRIMARY KEY (id)
) DEFAULT CHARSET=UTF8;

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_

　　4.创建pojo类

　　

package com.how2java.pojo;

public class Category {
    private int id;
    private String name;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    @Override
    public String toString() {
        return "Category [id=" + id + ", name=" + name + "]";
    }
}

　　5.创建一个Mapper接口

　　

package com.how2java.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();
}

　　6.创建与mapper对象对应的映射配置文件，这两个文件必须在同一个目录下面

　　

<?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.how2java.mapper.CategoryMapper">

    <insert id="add" parameterType="Category">
        insert into category_ ( name ) values (#{name})
    </insert>
    
    <delete id="delete" parameterType="int">
        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>

　　7.创建一个service接口

　　

package com.how2java.service;

import java.util.List;

import com.how2java.pojo.Category;

public interface CategoryService {
    
    List<Category> list();
}

　　8.创建该service接口的实现类，CategoryServiceImpl被注解@Service标示为一个Service并且装配了categoryMapper

package com.how2java.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.how2java.mapper.CategoryMapper;
import com.how2java.pojo.Category;
import com.how2java.service.CategoryService;
@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    CategoryMapper categoryMapper;
    @Override
    public List<Category> list() {
        
        return categoryMapper.list();
        
    }

}

　　9.创建controller，   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.how2java.pojo.Category;
import com.how2java.service.CategoryService;
// 告诉spring mvc这是一个控制器类
@Controller
public class CategoryController {
    @Autowired
    CategoryService categoryService;
    @RequestMapping("/listCategory")
    public ModelAndView listCategory() {
        List<Category> cs  = categoryService.list();
        ModelAndView mav = new ModelAndView();
　　　　// 放入转发参数
        mav.addObject("cs",cs);
　　　　// 放入jsp路径
        mav.setViewName("listCategory");
        return mav;
    }
}

　　10.在WEB-INF目录下新增加web.xml，这个web.xml有两个作用：
　　　　a.. 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
　　　　b. 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" 
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>SSM-1</display-name>
  <!-- 配置 Spring 的信息 -->
  <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>
  
  <!-- 配置 SpringMVC 的信息 -->
  <servlet>
      <servlet-name>servlet_dis</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <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>servlet_dis</servlet-name>
      <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

　　11.在src目录下新建applicationContext.xml文件，这是Spring的配置文件，其作用
　　　　a. 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" />

　　　　b.配置数据源

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">

　　　　c.扫描存放SQL语句的categoryMapper.xml

<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">

　　　　d.扫描Mapper，并将其生命周期纳入Spring的管理

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

 

以下是完整配置文件

<?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: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">
    <!-- 开启注解驱动 -->
    <context:annotation-config />
    <context:component-scan
        base-package="com.how2java.service" />
    <!-- 配置数据源 -->
    <bean id="dateSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName">
            <value>com.mysql.jdbc.Driver</value>
        </property>
        <property name="url">
            <value>jdbc:mysql://localhost:3306/how2java?characterEncoding=UTF-8</value>
        </property>
        <property name="username">
            <value>root</value>
        </property>
        <property name="password">
            <value>123456</value>
        </property>
    </bean>
    <!-- 扫描存放SQL语句的xml文件 -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="typeAliasesPackage" value="com.how2java.pojo" />
        <property name="dataSource" ref="dateSource"/>
        <property name="mapperLocations" value="classpath:com/how2java/mapper/*.xml"/>
    </bean>
    <!--将mapper的生命周期注入到spring中  -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.how2java.mapper"/>
    </bean>
</beans>

　　12.在src目录下新建springMVC.xml

　　　　a.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>

　　　　b.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 />

　　　　c.配置静态资源不拦截，如html,css,js,images可以访问

<mvc:default-servlet-handler />

　　　　d.视图定位到/WEB/INF/jsp 这个目录下,配置视图解析器

<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>

以下是完整代码

<?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">
        <!-- 开启注解驱动 -->
        <mvc:annotation-driven/>
        <!-- 把controller注入到spring中 -->
        <context:annotation-config/>
        <context:component-scan base-package="com.how2java.controller">
            <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>
        <!--开启静态资源不拦截  -->
        <mvc:default-servlet-handler/>
        <!-- 视图定位 -->
        <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <!--指定解析class-->
            <property name="viewClass"
                value="org.springframework.web.servlet.view.JstlView" />
            <!--视图存放位置-->
            <property name="prefix" value="/WEB-INF/jsp/" />
             <!--视图后缀名-->
            <property name="suffix" value=".jsp" />
        </bean>
</beans>

　　13.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>

　　14.把项目发布到tomcat服务器，显示如下结果