mybatis与spring集成

2020-12-13 15:28

阅读：530

标签：fir port url pageinfo cee -o wired html ebean

1.添加相关依赖

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

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

"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">
  4.0.0com.liuwenwu
  ssm
  1.0-SNAPSHOTwarssm Maven Webapphttp://www.example.comUTF-81.81.83.7.05.0.2.RELEASE3.4.55.1.445.1.21.3.12.1.12.4.32.9.14.124.0.01.18.2org.springframework
      spring-context
      ${spring.version}org.springframework
      spring-orm
      ${spring.version}org.springframework
      spring-tx
      ${spring.version}org.springframework
      spring-aspects
      ${spring.version}org.springframework
      spring-web
      ${spring.version}org.springframework
      spring-test
      ${spring.version}org.mybatis
      mybatis
      ${mybatis.version}mysql
      mysql-connector-java
      ${mysql.version}com.github.pagehelper
      pagehelper
      ${pagehelper.version}org.mybatis
      mybatis-spring
      ${mybatis.spring.version}org.apache.commons
      commons-dbcp2
      ${commons.dbcp2.version}org.apache.commons
      commons-pool2
      ${commons.pool2.version}org.apache.logging.log4j
      log4j-core
      ${log4j2.version}org.apache.logging.log4j
      log4j-api
      ${log4j2.version}org.apache.logging.log4j
      log4j-web
      ${log4j2.version}junit
      junit
      ${junit.version}testjavax.servlet
      javax.servlet-api
      ${servlet.version}providedorg.projectlombok
      lombok
      ${lombok.version}providedssmsrc/main/java**/*.xmlsrc/main/resourcesjdbc.properties*.xmlorg.apache.maven.plugins
          maven-compiler-plugin
          ${maven.compiler.plugin.version}${maven.compiler.source}${maven.compiler.target}${project.build.sourceEncoding}org.mybatis.generator
          mybatis-generator-maven-plugin
          1.3.2mysql
              mysql-connector-java
              ${mysql.version}true
          maven-clean-plugin
          3.1.0
          maven-resources-plugin
          3.0.2
          maven-compiler-plugin
          3.8.0
          maven-surefire-plugin
          2.22.1
          maven-war-plugin
          3.2.2
          maven-install-plugin
          2.5.2
          maven-deploy-plugin
          2.8.2

2.1 注解式开发
开启注解

base-package="com.zking.oa"/>

2.2 引入外部jdbc配置文件

"classpath:jdbc.properties"/>

2.3 配置dbcp2数据库连接池
详见“dbcp2.txt”

2.4 spring和mybatis整合
详见“spring与mybatis整合.txt”

2.5 注解式事物配置

配置事务管理（环绕通知）有关数据库操作的开启、提交操作都是在环绕在数据库操作的前后
切面
excution（* *..*Biz.*(..)）

2.6 开启动态代理

3.注解式开发
ssh中数据的增删改查spring的配置如下
@Repository

@Service

@Autowired/@Resource：

@Constroller

@Autowired/@Resource：

spring ioc注入方式
set
构造
自动装配
bytype 根据属性对应的接口在spring的上下文匹配实现类
byname 根据属性名在spring上下文中寻找对应的id的Bean

hibernate与spring测试
applicationContext applicationContext = new classpathxmlappli..("appplicationContext.xml");
applicationContext。getBean("xxxservice");

@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：
相当于之前spring、hibernate时代中的set注入，省去set、get方法
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

applicationContext-mabatis.xml

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

    
    
    base-package="com.liuwenwu"/>

    "classpath:jdbc.properties"/>

    "dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
          destroy-method="close">
        "driverClassName" value="${jdbc.driver}"/>
        "url" value="${jdbc.url}"/>
        "username" value="${jdbc.username}"/>
        "password" value="${jdbc.password}"/>
        
        "initialSize" value="10"/>
        
        "maxTotal" value="100"/>
        
        "maxIdle" value="50"/>
        
        "minIdle" value="10"/>
        
        
        "maxWaitMillis" value="-1"/>
    "sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        
        "dataSource" ref="dataSource"/>
        
        "mapperLocations" value="classpath*:com/liuwenwu/**/mapper/*.xml"/>
        
        "typeAliasesPackage" value="com/liuwenwu/**/model"/>
        
        "plugins">
            
                class="com.github.pagehelper.PageInterceptor">
                    "properties">
                        
                            helperDialect=mysql
                        class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        
        
        "basePackage" value="com/liuwenwu/**/mapper"/>
        "sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    "transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        "dataSource" ref="dataSource" />
    "transactionManager" />

applicationContext.xml
spring核心配置文件中引入 applicationContext-mybatis.xml

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

    
    "applicationContext-mabatis.xml">

4.Spring Test+Junit完美组合

4.1 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：

BookService：

package com.liuwenwu.service;

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

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

/**
 * @author LWW
 * @site www.lww.com
 * @company
 * @create 2019-09-24 19:20
 */
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 aaaa(Map map, PageBean pageBean);

    List listPager(Map map, PageBean pageBean);
}

bookservieimpl:

package com.liuwenwu.service.impl;

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

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

/**
 * @author LWW
 * @site www.lww.com
 * @company
 * @create 2019-09-24 19:22
 */

@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 updateByPrimaryKeySelective(record);
    }

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

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

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

SpringBaseTest.java：

package com.liuwenwu;

import com.liuwenwu.model.Book;
import com.liuwenwu.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 LWW
 * @site www.lww.com
 * @company
 * @create 2019-09-24 12:04
 */
@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：

package com.liuwenwu.service.impl;

import com.liuwenwu.SpringBaseTest;
import com.liuwenwu.model.Book;
import com.liuwenwu.service.BookService;
import com.liuwenwu.util.StringUtil;
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 LWW
 * @site www.lww.com
 * @company
 * @create 2019-09-24 19:28
 */
public class BookServiceImplTest extends SpringBaseTest {


    @Autowired
    private BookService bookService;




    @Test
    public void insert() {
        book.setBid(43);
        book.setBname("嘤嘤嘤");
        book.setPrice(200.0);
        this.bookService.insert(book);
    }

    @Test
    public void selectByPrimaryKey() {
        Book book = this.bookService.selectByPrimaryKey(43);
        System.out.println(book);
    }
   
}

技术图片

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。

PagerAspect

package com.liuwenwu;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.liuwenwu.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;

/**
 * @author LWW
 * @site www.lww.com
 * @company
 * @create 2019-09-24 20:10
 * 处理符合* *..*Service.*pager(..)这个方法，只要调用这个方法，就能达到分页的效果
 * PageHelper.start()
 * 调用目标方法之前
 * 处理结果集
 * .*Pager(map,pagebean)
 * .*Pager(map,banme)
 */

@Component
@Aspect
public class PagerAspect {
    @Around("execution(* *..*Service.*Pager(..))")
    public Object invoke(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(null != pageBean && pageBean.isPagination()){
            PageInfo pageInfo = new PageInfo((List) list);
            pageBean.setTotal(pageInfo.getTotal()+"");
        }
        return list;
    }

}

BookMapper.java:

List aaaa(Map map);

BookMapper.xml:

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

BookService:

    List aaaa(Map map, PageBean pageBean);

    List listPager(Map map, PageBean pageBean);

BookServiceImpl:

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

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

Junit测试：

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

    @Test
    public void listPager() {
        Map map =new HashMap();
        map.put("bname", StringUtil.toLikeStr("圣墟"));
        pageBean.setPage(3);
        List bbbb = this.bookService.listPager(map,pageBean);
        for (Map m : bbbb) {
            System.out.println(m);
        }

    }