mybatis与spring集成

Mybatis与spring集成

1、导入pom依赖

1.1 添加spring相关依赖(5.0.2.RELEASE)
       spring-core
       spring-beans
       spring-context
       spring-orm
       spring-tx
       spring-aspects
       spring-web

   1.2 添加mybatis相关依赖
       mybatis核心：mybatis(3.4.5)
       Mybatis分页：pagehelper(5.1.2)

   1.3 spring整合mybatis(1.3.1)
       mybatis-spring

   1.4 添加dbcp2连接池
       commons-dbcp2(2.1.1)
       commons-pool2(2.4.3)

   1.5 添加日志配置(2.9.1)
       log4j-core
       log4j-api
       log4j-web

   1.6 其他
       junit(4.12)
       javax.servlet-api(4.0.0)
       lombok(1.18.2)

   注：使用mybatis-generator插件，pom文件添加支持  

 

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>4.0.0modelVersion>

  <groupId>com.huanggroupId>
  <artifactId>mybatis03artifactId>
  <version>1.0-SNAPSHOTversion>
  <packaging>warpackaging>

  <name>mybatis03 Maven Webappname>
  
  <url>http://www.example.comurl>

  <properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    <maven.compiler.source>1.8maven.compiler.source>
    <maven.compiler.target>1.8maven.compiler.target>
    <maven.compiler.plugin.version>3.7.0maven.compiler.plugin.version>

    
    
    <spring.version>5.0.2.RELEASEspring.version>
    
    <mybatis.version>3.4.5mybatis.version>
    
    <mysql.version>5.1.44mysql.version>
    
    <pagehelper.version>5.1.2pagehelper.version>
    
    <mybatis.spring.version>1.3.1mybatis.spring.version>
    
    <commons.dbcp2.version>2.1.1commons.dbcp2.version>
    <commons.pool2.version>2.4.3commons.pool2.version>
    
    <log4j2.version>2.9.1log4j2.version>
    
    <junit.version>4.12junit.version>
    <servlet.version>4.0.0servlet.version>
    <lombok.version>1.18.2lombok.version>
  properties>

  <dependencies>
    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-contextartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-ormartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-txartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-aspectsartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-testartifactId>
      <version>${spring.version}version>
    dependency>

    
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatisartifactId>
      <version>${mybatis.version}version>
    dependency>
    
    <dependency>
      <groupId>mysqlgroupId>
      <artifactId>mysql-connector-javaartifactId>
      <version>${mysql.version}version>
    dependency>
    
    <dependency>
      <groupId>com.github.pagehelpergroupId>
      <artifactId>pagehelperartifactId>
      <version>${pagehelper.version}version>
    dependency>
    
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatis-springartifactId>
      <version>${mybatis.spring.version}version>
    dependency>

    
    <dependency>
      <groupId>org.apache.commonsgroupId>
      <artifactId>commons-dbcp2artifactId>
      <version>${commons.dbcp2.version}version>
    dependency>
    <dependency>
      <groupId>org.apache.commonsgroupId>
      <artifactId>commons-pool2artifactId>
      <version>${commons.pool2.version}version>
    dependency>

    
    
    <dependency>
      <groupId>org.apache.logging.log4jgroupId>
      <artifactId>log4j-coreartifactId>
      <version>${log4j2.version}version>
    dependency>
    <dependency>
      <groupId>org.apache.logging.log4jgroupId>
      <artifactId>log4j-apiartifactId>
      <version>${log4j2.version}version>
    dependency>
    
    <dependency>
      <groupId>org.apache.logging.log4jgroupId>
      <artifactId>log4j-webartifactId>
      <version>${log4j2.version}version>
    dependency>

    
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>${junit.version}version>
      <scope>testscope>
    dependency>
    <dependency>
      <groupId>javax.servletgroupId>
      <artifactId>javax.servlet-apiartifactId>
      <version>${servlet.version}version>
      <scope>providedscope>
    dependency>
    <dependency>
      <groupId>org.projectlombokgroupId>
      <artifactId>lombokartifactId>
      <version>${lombok.version}version>
      <scope>providedscope>
    dependency>
  dependencies>

  <build>
    <finalName>mybatis03finalName>
    <resources>
      
      <resource>
        <directory>src/main/javadirectory>
        <includes>
          <include>**/*.xmlinclude>
        includes>
      resource>
      
      <resource>
        <directory>src/main/resourcesdirectory>
        <includes>
          <include>jdbc.propertiesinclude>
          <include>*.xmlinclude>
        includes>
      resource>
    resources>
    <pluginManagement>
      <plugins>
        <plugin>
          <groupId>org.apache.maven.pluginsgroupId>
          <artifactId>maven-compiler-pluginartifactId>
          <version>${maven.compiler.plugin.version}version>
          <configuration>
            <source>${maven.compiler.source}source>
            <target>${maven.compiler.target}target>
            <encoding>${project.build.sourceEncoding}encoding>
          configuration>
        plugin>
        <plugin>
          <groupId>org.mybatis.generatorgroupId>
          <artifactId>mybatis-generator-maven-pluginartifactId>
          <version>1.3.2version>
          <dependencies>
            
            <dependency>
              <groupId>mysqlgroupId>
              <artifactId>mysql-connector-javaartifactId>
              <version>${mysql.version}version>
            dependency>
          dependencies>
          <configuration>
            <overwrite>trueoverwrite>
          configuration>
        plugin>
        <plugin>
          <artifactId>maven-clean-pluginartifactId>
          <version>3.1.0version>
        plugin>
        
        <plugin>
          <artifactId>maven-resources-pluginartifactId>
          <version>3.0.2version>
        plugin>
        <plugin>
          <artifactId>maven-compiler-pluginartifactId>
          <version>3.8.0version>
        plugin>
        <plugin>
          <artifactId>maven-surefire-pluginartifactId>
          <version>2.22.1version>
        plugin>
        <plugin>
          <artifactId>maven-war-pluginartifactId>
          <version>3.2.2version>
        plugin>
        <plugin>
          <artifactId>maven-install-pluginartifactId>
          <version>2.5.2version>
        plugin>
        <plugin>
          <artifactId>maven-deploy-pluginartifactId>
          <version>2.8.2version>
        plugin>
      plugins>
    pluginManagement>
  build>
project>

2、利用mybatis逆向工程生成模型层层代码

generatorConfig.xml

 

xml version="1.0" encoding="UTF-8" ?>
DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
    
    <properties resource="jdbc.properties"/>

    
    <classPathEntry location="F:\\initPath\\mvn_repository\\mysql\\mysql-connector-java\\5.1.44\\mysql-connector-java-5.1.44.jar"/>

    
    <context id="infoGuardian">
        
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
            <property name="suppressDate" value="true"/> 
        commentGenerator>

        
        <jdbcConnection driverClass="${jdbc.driver}"
                        connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>

        
        <javaTypeResolver>
            
            <property name="forceBigDecimals" value="false"/>
        javaTypeResolver>

        
        
        
        <javaModelGenerator targetPackage="com.huang.model"
                            targetProject="src/main/java">
            
            <property name="enableSubPackages" value="false"/>
            
            <property name="constructorBased" value="true"/>
            
            <property name="trimStrings" value="false"/>
            
            <property name="immutable" value="false"/>
        javaModelGenerator>

        
        <sqlMapGenerator targetPackage="com.huang.mapper"
                         targetProject="src/main/java">
            
            <property name="enableSubPackages" value="false"/>
        sqlMapGenerator>

        
        
        
        
        <javaClientGenerator targetPackage="com.huang.mapper"
                             targetProject="src/main/java" type="XMLMAPPER">
            
            <property name="enableSubPackages" value="false"/>
        javaClientGenerator>

        
        
        
        
        
        
        
        
        
        
        
        
        

        <table schema="" tableName="t_mvc_Book" domainObjectName="Book"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
            
            
            
            
        table>

    context>
generatorConfiguration>

 

 

3、编写配置文件applicationContext-mybatis.xml

 

applicationContext-mybatis.xml 是spring整合mybatis 的配置文件

 

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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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/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">

    
    
    <context:annotation-config/>
    
    <context:component-scan base-package="com.huang"/>

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

    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
          destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        
        <property name="initialSize" value="10"/>
        
        <property name="maxTotal" value="100"/>
        
        <property name="maxIdle" value="50"/>
        
        <property name="minIdle" value="10"/>
        
        
        <property name="maxWaitMillis" value="-1"/>
    bean>

    
    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        
        <property name="dataSource" ref="dataSource"/>
        
        <property name="mapperLocations" value="classpath*:com/huang/**/mapper/*.xml"/>
        
        <property name="typeAliasesPackage" value="com/huang/**/model"/>
        
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <value>
                            helperDialect=mysql
                        value>
                    property>
                bean>
            array>
        property>
    bean>

    
    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        
        
        <property name="basePackage" value="com/huang/**/mapper"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    bean>

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    bean>
    <tx:annotation-driven transaction-manager="transactionManager" />
    <aop:aspectj-autoproxy/>
beans>

 

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db_book?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123

log4j2.xml

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


<Configuration status="WARN" monitorInterval="30">
    <Properties>
        
        <Property name="LOG_HOME">/root/workspace/lucenedemo/logsProperty>
        <property name="ERROR_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/errorproperty>
        <property name="WARN_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/warnproperty>
        <property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level %logger{36} - %msg%nproperty>
    Properties>

    <Appenders>
        
        <Console name="Console" target="SYSTEM_OUT">
            
            <ThresholdFilter level="trace" onMatch="ACCEPT"
                             onMismatch="DENY" />
            
            
            <PatternLayout pattern="${PATTERN}" />
        Console>

        
        
        <File name="log" fileName="logs/test.log" append="false">
            <PatternLayout
                    pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
        File>
        
        <RollingFile name="RollingFileInfo" fileName="${LOG_HOME}/info.log"
                     filePattern="${LOG_HOME}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
            
            <ThresholdFilter level="info" onMatch="ACCEPT"
                             onMismatch="DENY" />
            <PatternLayout
                    pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
            <Policies>
                
                
                
                <TimeBasedTriggeringPolicy interval="1"
                                           modulate="true" />
                
                
            Policies>
        RollingFile>

        <RollingFile name="RollingFileWarn" fileName="${WARN_LOG_FILE_NAME}/warn.log"
                     filePattern="${WARN_LOG_FILE_NAME}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
            <ThresholdFilter level="warn" onMatch="ACCEPT"
                             onMismatch="DENY" />
            <PatternLayout
                    pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
            <Policies>
                <TimeBasedTriggeringPolicy />
                <SizeBasedTriggeringPolicy size="2 kB" />
            Policies>
            
            <DefaultRolloverStrategy max="20" />
        RollingFile>

        <RollingFile name="RollingFileError" fileName="${ERROR_LOG_FILE_NAME}/error.log"
                     filePattern="${ERROR_LOG_FILE_NAME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd-HH-mm}-%i.log">
            <ThresholdFilter level="error" onMatch="ACCEPT"
                             onMismatch="DENY" />
            <PatternLayout
                    pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
            <Policies>
                
                <TimeBasedTriggeringPolicy interval="1"
                                           modulate="true" />
                
            Policies>
        RollingFile>

    Appenders>

    
    <Loggers>
        
        <logger name="org.springframework" level="INFO">logger>
        <logger name="org.mybatis" level="INFO">logger>

        
        <logger name="org.springframework" level="ERROR" />
        <logger name="org.hibernate" level="ERROR" />
        <logger name="org.apache.struts2" level="ERROR" />
        <logger name="com.opensymphony.xwork2" level="ERROR" />
        <logger name="org.jboss" level="ERROR" />


        
        <root level="all">
            <appender-ref ref="Console" />
            <appender-ref ref="RollingFileInfo" />
            <appender-ref ref="RollingFileWarn" />
            <appender-ref ref="RollingFileError" />
        root>

    Loggers>

Configuration>

 

3.1 注解式开发
   开启注解
   --1. 注解式开发 -->
   -- 注解驱动 -->
   
   -- 用注解方式注入bean，并指定查找范围：com.javaxl.ssm及子子孙孙包-->
   "com.huang.ssm"/>

   3.2 引入外部jdbc配置文件
   "classpath:jdbc.properties"/>
 
   3.3 配置dbcp2数据库连接池

   3.4 spring和mybatis整合
  
   3.5 注解式事物配置
    
    "transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        "dataSource" ref="dataSource" />
    

    "transactionManager" />

   3.6 开启动态代理
   

3.7 注解式开发

   @Repository：将DAO类声明为Bean
   @Service：通常作用在业务层
   @Constroller：通常作用在控制层，将在Spring MVC中使用
   @Component：是一个泛化的概念，仅仅表示spring中的一个组件（Bean），可以作用在任何层次
   @Scope：模式声明（singleton|prototype）
   @Autowired：将自动在代码上下文与其匹配（默认是类型匹配）的Bean，并自动注入到相应的地方
   @Resource：
   1）@Resource后面没有任何内容，默认通过name属性去匹配bean，找不到再按type去匹配
   2）指定了name或者type则根据指定的类型去匹配bean
   3）指定了name和type则根据指定的name和type去匹配bean，任何一个不匹配都将报错

   问题：@Autowired和@Resource两个注解的区别：
   1）@Autowired默认按照byType方式进行bean匹配，@Resource默认按照byName方式进行bean匹配
   2）@Autowired是Spring的注解，@Resource是J2EE的注解，这个看一下导入注解的时候这两个注解的包名就一清二楚了
   Spring属于第三方的，J2EE是Java自己的东西，因此，建议使用@Resource注解，以减少代码和Spring之间的耦合。

   @Transactional
   注：个人感觉注解式事务比以前的声明式事务更加麻烦，要写的东西更多

4、Spring Test+junit完美组合

在工程的pom文件中增加spring-test的依赖

 <dependency>

       <groupId>org.springframeworkgroupId>

       <artifactId>spring-testartifactId>

       <version>${spring.version}version>

     dependency>

   4.2 创建BaseTestCase，并在该类上加上两个注解

   @RunWith(SpringJUnit4ClassRunner.class)

   @ContextConfiguration(locations={"classpath:applicationContext.xml"})

相关代码

Service层

 

package com.huang.service;

import com.huang.model.Book;
import com.huang.util.PageBean;

import java.util.List;
import java.util.Map;

/**
 * @auther 宇晨
 * @company
 * @create 2019-10-19-20:19
 */
public interface BookService {
    int deleteByPrimaryKey(Integer bid);

    int insert(Book record);

    int insertSelective(Book record);

    Book selectByPrimaryKey(Integer bid);

    int updateByPrimaryKeySelective(Book record);

    int updateByPrimaryKey(Book record);

    List

 

接口实现类

package com.huang.service.impl;

import com.huang.mapper.BookMapper;
import com.huang.model.Book;
import com.huang.service.BookService;
import com.huang.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;

/**
 * @auther 宇晨
 * @company
 * @create 2019-10-19-20:20
 */
@Service
public class BookServiceImpl implements BookService {
    @Autowired
    private BookMapper bookMapper;

    @Override
    public int deleteByPrimaryKey(Integer bid) {
        return bookMapper.deleteByPrimaryKey(bid);
    }

    @Override
    public int insert(Book record) {
        return bookMapper.insert(record);
    }

    @Override
    public int insertSelective(Book record) {
        return bookMapper.insertSelective(record);
    }

    @Override
    public Book selectByPrimaryKey(Integer bid) {
        return bookMapper.selectByPrimaryKey(bid);
    }

    @Override
    public int updateByPrimaryKeySelective(Book record) {
        return bookMapper.updateByPrimaryKeySelective(record);
    }

    @Override
    public int updateByPrimaryKey(Book record) {
        return bookMapper.updateByPrimaryKey(record);
    }

    @Override
    public List

SpringBaseTest

package com.huang;

import com.huang.model.Book;
import com.huang.util.PageBean;
import org.junit.Before;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

/**
 * @auther 宇晨
 * @company
 * @create 2019-10-19-20:17
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:applicationContext.xml"})
public class SpringBaseTest {
    protected Book book;
    protected PageBean pageBean;


    @Before
    public void init(){
        book=new Book();
        pageBean=new PageBean();
    }
}

BookServiceImplTest

package com.huang.service.impl;

import com.huang.SpringBaseTest;
import com.huang.model.Book;
import com.huang.service.BookService;
import com.huang.util.StringUtils;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @auther 宇晨
 * @company
 * @create 2019-10-19-20:26
 */
public class BookServiceImplTest extends SpringBaseTest {

    @Autowired
    private BookService bookService;

    @Test
    public void insert() {
        book.setBid(2);
        book.setBname("T226mybatis");
        book.setPrice(226f);
        this.bookService.insert(book);
    }

    @Test
    public void selectByPrimaryKey() {
        Book b = this.bookService.selectByPrimaryKey(100);
        System.out.println(b);
    }

}

 

Aop整合pagehelper插件

 

注意：记得开动态代理

 

使用AOP编程解决分页代码重复的问题

 

   @Around("execution(* *..*Service.*pager(..))")

 

   public Object invoke(ProceedingJoinPoint args)

 

语法结构：execution(方法修饰符  方法返回值  方法所属类 匹配方法名 (  方法中的形参表 )  方法申明抛出的异常  )

 

"*"  ：代表一个任意类型的参数；

 

“..”：代表零个或多个任意类型的参数。

 

package com.huang;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.huang.util.PageBean;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @auther 宇晨
 * @company
 * @create 2019-10-19-22:22
 *
 * 处理* *..*Service.*Pager这个方法，只要调用这个方法，就能够达到分页的效果
 *
 * PageHelper.start()
 * 调用目标方法之前
 * 处理结果集
 * .*Pager(map,pagebean)
 * *Pager(map,bname)
 */
@Component
@Aspect
public class PagerAspect {
    @Around("execution(* *..*Service.*pager(..))")
    public Object invoke(ProceedingJoinPoint args)throws Throwable{
//        判断符合条件的方法中是否包含pagebean参数
        Object[] params = args.getArgs();
        PageBean pageBean=null;
        for (Object param : params) {
            if(param instanceof PageBean){
                pageBean=(PageBean) param;
                break;
            }
        }
        if(pageBean !=null && pageBean.isPagination()){
            PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
        }
        Object list = args.proceed(params);

        if(pageBean !=null && pageBean.isPagination()){
            PageInfo pageInfo=new PageInfo((List) list);
            pageBean.setTotal(pageInfo.getTotal()+"");
        }
        return  list;
    }
}

 

测试代码

Mapper层

 

  select * from t_mvc_book where bname like concat(concat('%',#{bname}),'%')

int updateByPrimaryKey(Book record);

 Service层

public List

@Override
public List

 

 BookServiceImplTest

   @Test
    public void listPager() {
        Map map=new HashMap();
        map.put("bname", StringUtils.toLikeStr("圣墟"));
        pageBean.setPage(3);
        List