Spring+SpringMVC+MyBatis整合案例

刺骨的言语ヽ痛彻心扉 2021-09-09 12:04 331阅读 0赞

### 文章目录 ###

*  项目结构
 *  maven配置文件pom.xml
 *  webapp配置文件web.xml
 *  spring配置文件applicationContext.xml
 *  spring-mvc配置文件spring-mvc.xml
 *  mybatis映射文件AccountMapper.xml
 *  mybatis配置文件（两种整合方法）
 *  日志配置文件log4j.properties
 *  建表语句
 *  Tomcat传递过程

# 项目结构 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzUwMjE2Mjcw_size_16_color_FFFFFF_t_70]

# 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>
      
      <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>
        
        <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>
    
        
        <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>
    
        
        <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>
          <plugins>
            <plugin>
              <artifactId>maven-clean-plugin</artifactId>
              <version>3.0.0</version>
            </plugin>
            
            <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">
    
      
      <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>
    
      
      <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>
      
      <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">
    
        
        <context:component-scan base-package="com.neu">
            
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>
    
        
        <context:property-placeholder location="classpath:jdbc.properties"/>
    
        
        <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>
    
        
        <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"/>
            
            <property name="configLocation" value="classpath:sqlMapConfig-spring.xml"/>
        </bean>
    
        
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.neu.mapper"/>
        </bean>
    
        
        
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        
        <tx:advice id="txAdvice">
            <tx:attributes>
                <tx:method name="*"/>
            </tx:attributes>
        </tx:advice>
    
        
        <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">
    
        
        <context:component-scan base-package="com.neu.controller"/>
        
        <mvc:annotation-driven/>
        
        <bean id="resourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/pages/"/>
            <property name="suffix" value=".jsp"/>
        </bean>
        
        <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>
    
        
        <properties resource="jdbc.properties"/>
    
        <typeAliases>
            
            <package name="com.neu.domain"/>
        </typeAliases>
    
        
        <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>
    
        
        <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>
            
            <package name="com.neu.domain"/>
        </typeAliases>
    
        
        <mappers>
            <mapper resource="com/neu/mapper/AccountMapper.xml"/>
        </mappers>
    
    </configuration>

> spring配置注入

<context:property-placeholder location="classpath:jdbc.properties"/>
    
        
        <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>
    
        
        <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"/>
            
            <property name="configLocation" value="classpath:sqlMapConfig-spring.xml"/>
        </bean>
    
        
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.neu.mapper"/>
        </bean>
    
        
        
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        
        <tx:advice id="txAdvice">
            <tx:attributes>
                <tx:method name="*"/>
            </tx:attributes>
        </tx:advice>
    
        
        <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][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzUwMjE2Mjcw_size_16_color_FFFFFF_t_70 1]  
**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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