Spring、SpringMvc、MyBatis整合案例

前言：

Spring、SpringMvc、MyBatis各框架都学了一段时间了，现在综合起来做一个小案例。案例内容：查询所有账户列表以及通过表单保存账户。通过此案例，进一步理解各框架的应用以及熟悉整合过程中的一些列配置。

步骤：

搭建整合环境
    整合说明：
        此案例选择XML + 注解的方式
    整合的思路：
        1. 先搭建整合的环境
        2. 再使用Spring整合SpringMVC框架
        3. 最后使用Spring整合MyBatis框架

一、创建account数据库表

create table account(
    id int primary key auto_increment,
    name varchar(100),
    money double(7,2),
);

二、创建一个maven项目

此处可以参考之前博客：springMvc项目创建

导入maven坐标及相关的依赖

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <spring.version>5.0.2.RELEASE</spring.version>
    <slf4j.version>1.6.6</slf4j.version>
    <log4j.version>1.2.12</log4j.version>
    <mysql.version>5.1.6</mysql.version>
    <mybatis.version>3.4.5</mybatis.version>
  </properties>

  <dependencies>
    <!-- spring -->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.6.8</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <!-- log start -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>${log4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <!-- log end -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.0</version>
    </dependency>
    <dependency>
      <groupId>c3p0</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.1.2</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>
  </dependencies>

三、创建相应的实体类、表现层、服务层、持久层

实体类 Account

package com.xiaojie.pojo;

import java.io.Serializable;

/**
 * @program: springmvc01_start
 * @description: 账户实体类
 * @author: Mr.Li
 * @create: 2020-04-21 22:52
 **/
public class Account implements Serializable {
    private Integer id;
    private String name;
    private Double money;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Double getMoney() {
        return money;
    }

    public void setMoney(Double money) {
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

表现层：AccountController

package com.xiaojie.controller;

import com.xiaojie.pojo.Account;
import com.xiaojie.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

/**
 * @program: springmvc01_start
 * @description: 控制层
 * @author: Mr.Li
 * @create: 2020-04-21 23:28
 **/
@Controller
@RequestMapping("/account")
public class AccountController {
    @Autowired
    AccountService accountService;
    /**
     * 查询所有的数据
     * @return
     */
    @RequestMapping("/findAll")
    public String findAll(Model model) {
        System.out.println("表现层：查询所有账户...");
        List<Account> accounts = accountService.findAll();

        accounts.stream().forEach(account -> {
            System.out.println(account);
        });

        model.addAttribute("accounts",accounts);
        return "list";
    }

    @RequestMapping("/saveAccount")
    public void saveAccount(Account account, HttpServletRequest request, HttpServletResponse response) throws IOException {
        System.out.println("表现层：查询所有账户...");
        accountService.saveAccount(account);
        response.sendRedirect(request.getContextPath() + "/account/findAll");
    }
}

持久层：AccountDao 

       基于注解方式实现

package com.xiaojie.dao;

import com.xiaojie.pojo.Account;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface AccountDao {
    /**
     * 保存账户
     * @param account
     */
    @Insert("insert into account (name,money) values(#{name},#{money})")
    public void saveAccount(Account account);

    /**
     * 获取账户列表
     * @return
     */
    @Select("select * from account")
    public List<Account> findAll();
}

服务层：接口AccountService

       实现类 AccountServiceImpl 

package com.xiaojie.service;

import com.xiaojie.pojo.Account;

import java.util.List;

public interface AccountService {
    /**
     * 保存账户
     * @param account
     */
    public void saveAccount(Account account);

    /**
     * 获取账户列表
     * @return
     */
    public List<Account> findAll();
}

package com.xiaojie.service.impl;

import com.xiaojie.dao.AccountDao;
import com.xiaojie.pojo.Account;
import com.xiaojie.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @program: springmvc01_start
 * @description: 账户服务层
 * @author: Mr.Li
 * @create: 2020-04-21 22:57
 **/
@Service("accountService")
public class AccountServiceImpl implements AccountService {
    @Autowired
    AccountDao accountDao;

    @Override
    public void saveAccount(Account account) {
        System.out.println("业务层：查询所有账户...");
        accountDao.saveAccount(account);
    }

    @Override
    public List<Account> findAll() {
        System.out.println("业务层：查询所有账户...");
        return accountDao.findAll();
    }
}

四、spring整合SpringMVC、MyBatis框架

1、在resources文件中创建applicationContext.xml文件

在里面配置：注解扫描、连接池、SqlSession工厂、spring声明事务管理、aop

<?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.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!-- 开启注解扫描，要扫描的是service和dao层的注解，要忽略web层注解，
    因为web层让SpringMVC框架去管理 -->
    <context:component-scan base-package="com.xiaojie">
        <!--配置要忽略的注解-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
    </context:component-scan>

    <!--配置c3p0连接池对象-->
    <bean id="dateSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql:///springtest" />
        <property name="username" value="root" />
        <property name="password" value="123456" />
    </bean>

    <!--配置SqlSession的工厂-->
    <bean id="SqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dateSource"></property>
    </bean>

    <!--配置扫描的dao包-->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.xiaojie.dao"></property>
    </bean>

    <!--配置spring声明式事务管理-->
    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dateSource"></property>
    </bean>

    <!--配置事务通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" read-only="true"/>
            <tx:method name="*" isolation="DEFAULT"></tx:method>
        </tx:attributes>
    </tx:advice>

    <!--配置aop增强-->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.xiaojie.service.impl.*ServiceImpl.*(..))"></aop:advisor>
    </aop:config>
</beans>

2、在resources文件中创建springmvc.xml文件

在里面配置：前端的视图解析器、表现层的注解扫描、静态资源过滤等

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 扫描controller的注解，别的不扫描 -->
    <context:component-scan base-package="com.xiaojie">
        <context:include-filter type="annotation"
                                expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 配置视图解析器 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- JSP文件所在的目录 -->
        <property name="prefix" value="/WEB-INF/pages/" />
        <!-- 文件的后缀名 -->
        <property name="suffix" value=".jsp" />
    </bean>

    <!-- 设置静态资源不过滤 -->
    <mvc:resources location="/css/" mapping="/css/**" />
    <mvc:resources location="/images/" mapping="/images/**" />
    <mvc:resources location="/js/" mapping="/js/**" />

    <!-- 开启对SpringMVC注解的支持 -->
    <mvc:annotation-driven />
</beans>

3、web.xml中配置：

因为需要在项目启动的时候，就去加载applicationContext.xml、springmvc.xml的配置文件（上面配置的），所以需要在web.xml中配置ContextLoaderListener监听器、前端控制器、中文乱码过滤器等

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  
  <!--配置前端控制器：服务器启动必须加载，需要加载springmvc.xml配置文件-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--配置初始化参数-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
    <!--服务器启动的时候 ，让DispatcherServlet对象创建-->
    <load-on-startup>1</load-on-startup>
  </servlet>
  
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!-- 配置Spring的监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- 配置加载类路径的配置文件 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

  <!--配置解决中文乱码的过滤器-->
  <filter>
    <filter-name>characterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>

  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

</web-app>

五、编写jsp页面进行测试

webapp目录结构

1、index.jsp

<%--
  Created by IntelliJ IDEA.
  User: ASUS
  Date: 2020/4/21
  Time: 23:28
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <a href="account/findAll">testFindAll</a>

    <h3>测试保存a</h3>
    <form action="account/saveAccount" method="post">
        姓名：<input type="text" name="name"/><br>
        金额：<input type="text" name="money"/><br>
        <input type="submit" value="保存"/><br>
    </form>
</body>
</html>

lsit.jsp

<%--
  Created by IntelliJ IDEA.
  User: ASUS
  Date: 2020/4/21
  Time: 23:29
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    查询成功！
    <table border="1" width="300px">
        <tr>
            <th>编号</th>
            <th>账户名称</th>
            <th>金额</th>
        </tr>
        <c:forEach items="${accounts}" var="account">
            <tr>
                <td>${account.id}</td>
                <td>${account.name}</td>
                <td>${account.money}</td>
            </tr>
        </c:forEach>
    </table>
</body>
</html>

六、测试运行结果：

1、配置tomcat服务器，然后添加当前项目的war包

2、选择后点击应用，并启动服务

浏览器会看到首页内容

点击testFindAll后的页面

通过表单添加：

点击保存自动跳转查询页：

终于更到最后了。虽然案例简单，但还是记录一下自己的学习的一个过程吧，毕竟整合的过程还是很容易出错的。记录只是便于以后的一个回忆吧，希望大家养成一个记录的习惯，至少给正在变强路上的你留些沙雕记忆。最后祝愿大家生活愉快……