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Spring SpringMVC MyBatis整合

Henrik-Yao 人气:0
想了解Spring+SpringMVC+MyBatis整合实战(SSM框架)的相关内容吗，Henrik-Yao在本文为您仔细讲解Spring SpringMVC MyBatis整合 的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：Spring,SpringMVC,MyBatis整合,Spring,SpringMVC,MyBatis，下面大家一起来学习吧。

在写代码之前我们先了解一下这三个框架分别是干什么的？

SpringMVC

它用于web层，相当于controller（等价于传统的servlet和struts的action），用来处理用户请求。举个例子，用户在地址栏输入http://网站域名/login，那么springmvc就会拦截到这个请求，并且调用controller层中相应的方法，（中间可能包含验证用户名和密码的业务逻辑，以及查询数据库操作，但这些都不是springmvc的职责），最终把结果返回给用户，并且返回相应的页面（当然也可以只返回json/xml等格式数据）。springmvc就是做前面和后面过程的活，与用户打交道！！

Spring

太强大了，以至于我无法用一个词或一句话来概括它。但与我们平时开发接触最多的估计就是IOC容器，它可以装载bean（也就是我们java中的类，当然也包括service dao里面的），有了这个机制，我们就不用在每次使用这个类的时候为它初始化，很少看到关键字new。另外spring的aop，事务管理等等都是我们经常用到的。

MyBatis

如果你问我它跟鼎鼎大名的Hibernate有什么区别？我只想说，他更符合我的需求。第一，它能自由控制sql，这会让有数据库经验的人（当然不是说我啦~捂脸~）编写的代码能搞提升数据库访问的效率。第二，它可以使用xml的方式来组织管理我们的sql，因为一般程序出错很多情况下是sql出错，别人接手代码后能快速找到出错地方，甚至可以优化原来写的sql。

项目结构

在这里插入图片描述

maven配置文件pom.xml

<?xml version="1.0" encoding="UTF-8"?>

<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.neu</groupId>
  <artifactId>spring-over</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>spring-over Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <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>
  </properties>

  <dependencies>
    <!--spring相关-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.0.5.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.8.7</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.0.5.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>5.0.5.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>5.0.5.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.0.5.RELEASE</version>
    </dependency>

    <!--servlet和jsp-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
    </dependency>

    <!--mybatis相关-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.5</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.1</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.44</version>
    </dependency>
    <dependency>
      <groupId>c3p0</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.1.2</version>
    </dependency>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>sprig-over</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.7.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.20.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

webapp配置文件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">

  <!--spring监听器-->
  <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>

  <!--springmvc的前端控制器-->
  <servlet>
    <servlet-name>DispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>DispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <!--乱码过滤器-->
  <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>

spring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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">

    <!--组件扫描 扫描service和mapper-->
    <context:component-scan base-package="com.neu">
        <!--排除controller的扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!--加载properties文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!--配置数据源信息-->
    <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}"/>
    </bean>

    <!--配饰sessionFactory-->
    <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--mybatis核心文件-->
        <property name="configLocation" value="classpath:sqlMapConfig-spring.xml"/>
    </bean>

    <!--扫描mapper所在的包 未mapper创建实现类-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.neu.mapper"/>
    </bean>

    <!--声明式事务控制-->
    <!--平台事务控制器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--配置事务增强-->
    <tx:advice id="txAdvice">
        <tx:attributes>
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>

    <!--事务aop织入-->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.neu.service.impl.*.*(..))"/>
    </aop:config>

</beans>

spring-mvc配置文件spring-mvc.xml

<?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">

    <!--组件扫描-->
    <context:component-scan base-package="com.neu.controller"/>
    <!--配置mvc注解驱动-->
    <mvc:annotation-driven/>
    <!--内部资源视图解析器-->
    <bean id="resourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--开放静态资源访问权限-->
    <mvc:default-servlet-handler/>
</beans>

mybatis映射文件AccountMapper.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.neu.mapper.AccountMapper">
    <insert id="save" parameterType="account">
        insert into account(id,name,money) values(#{id},#{name},#{money})
    </insert>

    <select id="findAll" resultType="account">
        select * from account
    </select>

</mapper>

mybatis配置文件（两种整合方法）

1.sqlMapConfig.xml直接引入

<?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>

    <!--加载properties文件-->
    <properties resource="jdbc.properties"/>

    <typeAliases>
        <!--<typeAlias type="com.neu.domain.Account" alias="account"/>-->
        <package name="com.neu.domain"/>
    </typeAliases>

    <!--环境-->
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>

    <!--加载映射-->
    <mappers>
        <mapper resource="com/neu/mapper/AccountMapper.xml"/>
    </mappers>
</configuration>

引入方法

public void save(Account account) {
        try {
            //加载配置文件
            InputStream resourceAsStream = Resources.getResourceAsStream("sqlMapConfig.xml");
            //构建会话工厂
            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
            //创建连接
            SqlSession sqlSession = sqlSessionFactory.openSession();
            //获取映射对象
            AccountMapper mapper = sqlSession.getMapper(AccountMapper.class);
            //执行方法
            mapper.save(account);
            //提交连接
            sqlSession.commit();
            //关闭连接
            sqlSession.close();
        } catch (IOException exception) {
            exception.printStackTrace();
        }
    }

2.sqlMapConfig-spring.xml使用spring构建连接

sqlMapConfig-spring.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>

    <typeAliases>
        <!--<typeAlias type="com.neu.domain.Account" alias="account"/>-->
        <package name="com.neu.domain"/>
    </typeAliases>

    <!--加载映射-->
    <mappers>
        <mapper resource="com/neu/mapper/AccountMapper.xml"/>
    </mappers>

</configuration>

spring配置注入

<!--加载properties文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!--配置数据源信息-->
    <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}"/>
    </bean>

    <!--配饰sessionFactory-->
    <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--mybatis核心文件-->
        <property name="configLocation" value="classpath:sqlMapConfig-spring.xml"/>
    </bean>

    <!--扫描mapper所在的包 未mapper创建实现类-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.neu.mapper"/>
    </bean>

    <!--声明式事务控制-->
    <!--平台事务控制器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--配置事务增强-->
    <tx:advice id="txAdvice">
        <tx:attributes>
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>

    <!--事务aop织入-->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.neu.service.impl.*.*(..))"/>
    </aop:config>

注入代码

@Autowired
private AccountMapper accountMapper;


@Override
public void save(Account account) {
    accountMapper.save(account);
}

日志配置文件log4j.properties

#
# Hibernate, Relational Persistence for Idiomatic Java
#
# License: GNU Lesser General Public License (LGPL), version 2.1 or later.
# See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
#

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.err
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file hibernate.log ###
#log4j.appender.file=org.apache.log4j.FileAppender
#log4j.appender.file.File=hibernate.log
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=all, stdout

建表语句

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

Tomcat传递过程

1.网页获取表单

save.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h1>添加账户信息表单</h1>
    <form name="accountForm" action="${pageContext.request.contextPath}/account/save" method="post">
        账户名称:<input type="text" name="name"><br>
        账户金额:<input type="text" name="money"><br>
        <input type="submit" name="保存"><br>
    </form>

</body>
</html>

在这里插入图片描述

2.Controller层处理请求

AccountController.java

package com.neu.controller;

import com.neu.domain.Account;
import com.neu.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;

@Controller
@RequestMapping("/account")
public class AccountController {

    @Autowired
    private AccountService accountService;

    @RequestMapping(value = "/save",produces = "text/html;charset=UTF-8")
    @ResponseBody
    public String save(Account account){
        accountService.save(account);
        System.out.println(account);
        return "保存成功";
    }

    @RequestMapping("/findAll")
    public ModelAndView findAll(){
        List<Account> accountList = accountService.findAll();
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("accountList",accountList);
        modelAndView.setViewName("accountList");
        return modelAndView;
    }
}

3.service层处理业务逻辑

AccountServiceimpl.java

package com.neu.service.impl;

import com.neu.domain.Account;
import com.neu.mapper.AccountMapper;
import com.neu.service.AccountService;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.util.List;

@Service("accountService")
public class AccountServiceImpl implements AccountService {

    @Autowired
    private AccountMapper accountMapper;


    @Override
    public void save(Account account) {
//        try {
//            //加载配置文件
//            InputStream resourceAsStream = Resources.getResourceAsStream("sqlMapConfig.xml");
//            //构建会话工厂
//            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
//            //创建连接
//            SqlSession sqlSession = sqlSessionFactory.openSession();
//            //获取映射对象
//            AccountMapper mapper = sqlSession.getMapper(AccountMapper.class);
//            //执行方法
//            mapper.save(account);
//            //提交连接
//            sqlSession.commit();
//            //关闭连接
//            sqlSession.close();
//        } catch (IOException exception) {
//            exception.printStackTrace();
//        }
        accountMapper.save(account);
    }

    @Override
    public List<Account> findAll() {
//        try {
//            InputStream resourceAsStream = Resources.getResourceAsStream("sqlMapConfig.xml");
//            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
//            SqlSession sqlSession = sqlSessionFactory.openSession();
//            AccountMapper mapper = sqlSession.getMapper(AccountMapper.class);
//            List<Account> accountList = mapper.findAll();
//            sqlSession.close();
//            return accountList;
//        } catch (IOException exception) {
//            exception.printStackTrace();
//        }
        return accountMapper.findAll();
    }
}

4.mapper与数据库交互
mapper层对数据库进行数据持久化操作，他的方法语句是直接针对数据库操作的，主要实现一些增删改查操作，在mybatis中方法主要与与xxx.xml内相互一一映射

AccountMapper.java

package com.neu.mapper;

import com.neu.domain.Account;

import java.util.List;

public interface AccountMapper {

    public void save(Account account);

    public List<Account> findAll();
}

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