spring整合mybatis

spring整合mybatis
1.添加相关依赖
注：spring 5.0.1.RELEASE有冲突

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

<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.lxgroupId>
  <artifactId>ssmartifactId>
  <version>1.0-SNAPSHOTversion>
  <packaging>warpackaging>

  <name>ssm 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>ssmfinalName>
    <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>

检测pom依赖中的jar是否全部生成成功：

2.创建spring配置文件applicationContext

2.1 注解式开发
开启注解

context:annotation-config/

2.2 引入外部jdbc配置文件

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/tb_0523?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123

2.3 配置dbcp2数据库连接池

2.4 spring和mybatis整合

2.5 注解式事物配置

2.6 开启动态代理
aop:aspectj-autoproxy/

<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.zking"/>

    <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/zking/**/mapper/*.xml"/>
        
        <property name="typeAliasesPackage" value="com/zking/**/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/zking/**/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>

3.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。

在配置我们的applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"
       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">

    
    <import resource="applicationContext-mybatis.xml">import>
beans>

4、Spring Test+junit完美组合

在工程的pom文件中增加spring-test的依赖

org.springframework
spring-test
${spring.version}

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

package com.zking;

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

/**
 * @author润红的爸爸
 * @site www.xiaomage.com
 * @company 潇洒公司
 * @create 2019-09-24 11:09
 */
@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();
    }
}

测试整合成功没有
Service层

package com.zking.service;

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

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

/**
 * @author润红的爸爸
 * @site www.xiaomage.com
 * @company 潇洒公司
 * @create 2019-09-24 11:11
 */
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<Map> aaaa(Map map, PageBean pageBean);

    List<Map> listPager(Map map,PageBean pageBean);
}

BookServiceImpl

package com.zking.service.impl;

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

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

/**
 * @author润红的爸爸
 * @site www.xiaomage.com
 * @company 潇洒公司
 * @create 2019-09-24 11:12
 */
@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<Map> aaaa(Map map, PageBean pageBean) {
        return bookMapper.aaaa(map);
    }

    @Override
    public List<Map> listPager(Map map, PageBean pageBean) {
        return bookMapper.aaaa(map);
    }
}

BookServiceImplTest.java

package com.zking.service.impl;

import com.zking.SpringBaseTest;
import com.zking.model.Book;
import com.zking.service.BookService;
import com.zking.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;

import static org.junit.Assert.*;

/**
 * @author润红的爸爸
 * @site www.xiaomage.com
 * @company 潇洒公司
 * @create 2019-09-24 11:18
 */
public class BookServiceImplTest extends SpringBaseTest {
    @Autowired
    private BookService bookService;

    @Test
    public void insert() {
        book.setBid(63555);
        book.setBname("t224 ssm");
        book.setPrice(779f);
        this.bookService.insert(book);
    }

    @Test
    public void selectByPrimaryKey() {
        Book b = this.bookService.selectByPrimaryKey(63555);
        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。

切面类PagerAspect

package com.zking;

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

/**
 * @author润红的爸爸
 * @site www.xiaomage.com
 * @company 潇洒公司
 * @create 2019-09-24 11:54
 *
 * 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
 *
 * pagerhelper。static（）；
 * 调用目标方法之前
 * 处理结果集
 *
 * 。*pager（map,pagerbean)
 * *pager（map,bname)
 */
@Component
@Aspect
public class PagerAspect {
    @Around("execution(* *..*Service.*Pager(..))")
    public Object invock(ProceedingJoinPoint args) throws Throwable{
        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();
            pageBean.setTotal(pageInfo.getTotal()+"");
        }
        return list;
    }
}

测试代码
Mapper层

<select id="aaaa" parameterType="java.util.Map" resultType="java.util.Map">
    select * from t_mvc_book
    <where>
      <if test="null != bname and bname != ''">
        and bname like #{bname}
      if>
    where>
  select>

Service层

 List<Map> aaaa(Map map, PageBean pageBean);

    List<Map> listPager(Map map,PageBean pageBean);

BookServiceImplTest.java
不能分页

@Test
    public void aaaa() {
        Map map = new HashMap();
        map.put("bname", StringUtils.toLikeStr("圣墟"));
        List<Map> aaaa = this.bookService.aaaa(map, pageBean);
        for (Map a : aaaa) {
            System.out.println(a);
        }
    }

可以分页

 @Test
    public void listPager() {
        Map map = new HashMap();
        map.put("bname", StringUtils.toLikeStr("圣墟"));
        List<Map> aaaa = this.bookService.listPager(map, pageBean);
        for (Map a : aaaa) {
            System.out.println(a);
        }
    }

注：dbcp是apache上的一个java 连接池项目
现在分成了3个大版本，不同的版本要求的JDK不同：
DBCP 2 compiles and runs under Java 7 only (JDBC 4.1)
DBCP 1.4 compiles and runs under Java 6 only (JDBC 4)
DBCP 1.3 compiles and runs under Java 1.4-5 only (JDBC 3)