Mybatis与spring集成

1、Mybatis与spring集成

2、Aop整合pagehelper插件

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)

  1 <?xml version="1.0" encoding="UTF-8"?>
  2 
  3 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  5   <modelVersion>4.0.0</modelVersion>
  6 
  7   <groupId>com.MavenMybatis</groupId>
  8   <artifactId>Mybatis_1</artifactId>
  9   <version>1.0-SNAPSHOT</version>
 10   <packaging>war</packaging>
 11   <name>ssm Maven Webapp</name>
 12   <!-- FIXME change it to the project's website -->
 13   <url>http://www.example.com</url>
 14 
 15   <properties>
 16     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 17     <maven.compiler.source>1.8</maven.compiler.source>
 18     <maven.compiler.target>1.8</maven.compiler.target>
 19     <maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>
 20 
 21     <!--添加jar包依赖-->
 22     <!--1.spring 5.0.2.RELEASE相关-->
 23     <spring.version>5.0.2.RELEASE</spring.version>
 24     <!--2.mybatis相关-->
 25     <mybatis.version>3.4.5</mybatis.version>
 26     <!--mysql-->
 27     <mysql.version>5.1.44</mysql.version>
 28     <!--pagehelper分页jar依赖-->
 29     <pagehelper.version>5.1.2</pagehelper.version>
 30     <!--mybatis与spring集成jar依赖-->
 31     <mybatis.spring.version>1.3.1</mybatis.spring.version>
 32     <!--3.dbcp2连接池相关 druid-->
 33     <commons.dbcp2.version>2.1.1</commons.dbcp2.version>
 34     <commons.pool2.version>2.4.3</commons.pool2.version>
 35     <!--4.log日志相关-->
 36     <log4j2.version>2.9.1</log4j2.version>
 37     <!--5.其他-->
 38     <junit.version>4.12</junit.version>
 39     <servlet.version>4.0.0</servlet.version>
 40     <lombok.version>1.18.2</lombok.version>
 41   </properties>
 42 
 43   <dependencies>
 44     <!--1.spring相关-->
 45     <dependency>
 46       <groupId>org.springframework</groupId>
 47       <artifactId>spring-context</artifactId>
 48       <version>${spring.version}</version>
 49     </dependency>
 50     <dependency>
 51       <groupId>org.springframework</groupId>
 52       <artifactId>spring-orm</artifactId>
 53       <version>${spring.version}</version>
 54     </dependency>
 55     <dependency>
 56       <groupId>org.springframework</groupId>
 57       <artifactId>spring-tx</artifactId>
 58       <version>${spring.version}</version>
 59     </dependency>
 60     <dependency>
 61       <groupId>org.springframework</groupId>
 62       <artifactId>spring-aspects</artifactId>
 63       <version>${spring.version}</version>
 64     </dependency>
 65     <dependency>
 66       <groupId>org.springframework</groupId>
 67       <artifactId>spring-web</artifactId>
 68       <version>${spring.version}</version>
 69     </dependency>
 70     <dependency>
 71       <groupId>org.springframework</groupId>
 72       <artifactId>spring-test</artifactId>
 73       <version>${spring.version}</version>
 74     </dependency>
 75 
 76     <!--2.mybatis相关-->
 77     <dependency>
 78       <groupId>org.mybatis</groupId>
 79       <artifactId>mybatis</artifactId>
 80       <version>${mybatis.version}</version>
 81     </dependency>
 82     <!--mysql-->
 83     <dependency>
 84       <groupId>mysql</groupId>
 85       <artifactId>mysql-connector-java</artifactId>
 86       <version>${mysql.version}</version>
 87     </dependency>
 88     <!--pagehelper分页插件jar包依赖-->
 89     <dependency>
 90       <groupId>com.github.pagehelper</groupId>
 91       <artifactId>pagehelper</artifactId>
 92       <version>${pagehelper.version}</version>
 93     </dependency>
 94     <!--mybatis与spring集成jar包依赖-->
 95     <dependency>
 96       <groupId>org.mybatis</groupId>
 97       <artifactId>mybatis-spring</artifactId>
 98       <version>${mybatis.spring.version}</version>
 99     </dependency>
100 
101     <!--3.dbcp2连接池相关-->
102     <dependency>
103       <groupId>org.apache.commons</groupId>
104       <artifactId>commons-dbcp2</artifactId>
105       <version>${commons.dbcp2.version}</version>
106     </dependency>
107     <dependency>
108       <groupId>org.apache.commons</groupId>
109       <artifactId>commons-pool2</artifactId>
110       <version>${commons.pool2.version}</version>
111     </dependency>
112 
113     <!--4.log日志相关依赖-->
114     <!--核心log4j2jar包-->
115     <dependency>
116       <groupId>org.apache.logging.log4j</groupId>
117       <artifactId>log4j-core</artifactId>
118       <version>${log4j2.version}</version>
119     </dependency>
120     <dependency>
121       <groupId>org.apache.logging.log4j</groupId>
122       <artifactId>log4j-api</artifactId>
123       <version>${log4j2.version}</version>
124     </dependency>
125     <!--web工程需要包含log4j-web，非web工程不需要-->
126     <dependency>
127       <groupId>org.apache.logging.log4j</groupId>
128       <artifactId>log4j-web</artifactId>
129       <version>${log4j2.version}</version>
130     </dependency>
131 
132     <!--5.其他-->
133     <dependency>
134       <groupId>junit</groupId>
135       <artifactId>junit</artifactId>
136       <version>${junit.version}</version>
137       <scope>test</scope>
138     </dependency>
139     <dependency>
140       <groupId>javax.servlet</groupId>
141       <artifactId>javax.servlet-api</artifactId>
142       <version>${servlet.version}</version>
143       <scope>provided</scope>
144     </dependency>
145     <dependency>
146       <groupId>org.projectlombok</groupId>
147       <artifactId>lombok</artifactId>
148       <version>${lombok.version}</version>
149       <scope>provided</scope>
150     </dependency>
151 
152   </dependencies>
153 
154   <build>
155     <finalName>ssm</finalName>
156     <resources>
157       <!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
158       <resource>
159         <directory>src/main/java</directory>
160         <includes>
161           <include>**/*.xml</include>
162         </includes>
163       </resource>
164       <!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
165       <resource>
166         <directory>src/main/resources</directory>
167         <includes>
168           <include>jdbc.properties</include>
169           <include>*.xml</include>
170         </includes>
171       </resource>
172     </resources>
173     <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
174       <plugins>
175         <plugin>
176           <groupId>org.apache.maven.plugins</groupId>
177           <artifactId>maven-compiler-plugin</artifactId>
178           <version>${maven.compiler.plugin.version}</version>
179           <configuration>
180             <source>${maven.compiler.source}</source>
181             <target>${maven.compiler.target}</target>
182             <encoding>${project.build.sourceEncoding}</encoding>
183           </configuration>
184         </plugin>
185         <plugin>
186           <groupId>org.mybatis.generator</groupId>
187           <artifactId>mybatis-generator-maven-plugin</artifactId>
188           <version>1.3.2</version>
189           <dependencies>
190             <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
191             <dependency>
192               <groupId>mysql</groupId>
193               <artifactId>mysql-connector-java</artifactId>
194               <version>${mysql.version}</version>
195             </dependency>
196           </dependencies>
197           <configuration>
198             <overwrite>true</overwrite>
199           </configuration>
200         </plugin>
201       </plugins>
202     </pluginManagement>
203   </build>
204 </project>

利用mybatis逆向工程生成模型层层代码

编写配置文件applicationContext-mybatis.xml

注解式开发

开启注解

1 <context:annotation-config/>

1  <context:component-scan base-package="com.javaxl.ssm"/>

引入外部jdbc配置文件

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

配置dbcp2数据库连接池

spring和mybatis整合

注解式事物配置

1 <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
2         <property name="dataSource" ref="dataSource" />
3 </bean>
4  <tx:annotation-driven transaction-manager="transactionManager" />

开启动态代理

1 <aop:aspectj-autoproxy/>

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

applicationContext-mybatis.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
 5        xmlns:aop="http://www.springframework.org/schema/aop"
 6        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">
 7     <!--1. 注解式开发 -->
 8     <!-- 注解驱动 -->
 9     <context:annotation-config/>
10     <!-- 用注解方式注入bean，并指定查找范围：com.cgl.ssm及子子孙孙包-->
11     <context:component-scan base-package="com.Mybatis.ssm"/>
12 
13     <context:property-placeholder location="classpath:jdbc.properties"/>
14 
15     <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
16           destroy-method="close">
17         <property name="driverClassName" value="${jdbc.driver}"/>
18         <property name="url" value="${jdbc.url}"/>
19         <property name="username" value="${jdbc.username}"/>
20         <property name="password" value="${jdbc.password}"/>
21         <!--初始连接数-->
22         <property name="initialSize" value="10"/>
23         <!--最大活动连接数-->
24         <property name="maxTotal" value="100"/>
25         <!--最大空闲连接数-->
26         <property name="maxIdle" value="50"/>
27         <!--最小空闲连接数-->
28         <property name="minIdle" value="10"/>
29         <!--设置为-1时，如果没有可用连接，连接池会一直无限期等待，直到获取到连接为止。-->
30         <!--如果设置为N（毫秒），则连接池会等待N毫秒，等待不到，则抛出异常-->
31         <property name="maxWaitMillis" value="-1"/>
32     </bean>
33 
34     <!--4. spring和MyBatis整合 -->
35     <!--1) 创建sqlSessionFactory-->
36     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
37         <!-- 指定数据源 -->
38         <property name="dataSource" ref="dataSource"/>
39         <!-- 自动扫描XxxMapping.xml文件，**任意路径 -->
40         <property name="mapperLocations" value="classpath*:com/Mybatis/ssm/**/mapper/*.xml"/>
41         <!-- 指定别名 -->
42         <property name="typeAliasesPackage" value="com/Mybatis/ssm/**/model"/>
43         <!--配置pagehelper插件-->
44         <property name="plugins">
45             <array>
46                 <bean class="com.github.pagehelper.PageInterceptor">
47                     <property name="properties">
48                         <value>
49                             helperDialect=mysql
50                         </value>
51                     </property>
52                 </bean>
53             </array>
54         </property>
55     </bean>
56 
57     <!--2) 自动扫描com/cgl/ssm/**/mapper下的所有XxxMapper接口(其实就是DAO接口)，并实现这些接口，-->
58     <!--   即可直接在程序中使用dao接口，不用再获取sqlsession对象-->
59     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
60         <!--basePackage 属性是映射器接口文件的包路径。-->
61         <!--你可以使用分号或逗号 作为分隔符设置多于一个的包路径-->
62         <property name="basePackage" value="com/Mybatis/ssm/**/mapper"/>
63         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
64     </bean>
65 
66     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
67         <property name="dataSource" ref="dataSource" />
68     </bean>
69     <tx:annotation-driven transaction-manager="transactionManager" />
70     <aop:aspectj-autoproxy/>
71 </beans>

applicationContext.xml

1 ?xml version="1.0" encoding="UTF-8"?>
2 <beans xmlns="http://www.springframework.org/schema/beans"
3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
5     <!--整合mybatis框架-->
6     <import resource="applicationContext-mybatis.xml"></import>
7 </beans>

BookService

 1 package com.Mybatis.ssm.service;
 2 
 3 import com.Mybatis.ssm.model.Book;
 4 import com.Mybatis.ssm.util.PageBean;
 5 
 6 import java.util.List;
 7 
 8 public interface BookService {
 9 
10     int deleteByPrimaryKey(Integer bid);
11 
12     int insert(Book record);
13 
14     int insertSelective(Book record);
15 
16     Book selectByPrimaryKey(Integer bid);
17 
18     int updateByPrimaryKeySelective(Book record);
19 
20     int updateByPrimaryKey(Book record);
21 
22     List<Book> listPage(Book book, PageBean pageBean);
23 }

BookServiceImpl

 1 package com.Mybatis.ssm.service.impl;
 2 
 3 import com.Mybatis.ssm.mapper.BookMapper;
 4 import com.Mybatis.ssm.model.Book;
 5 import com.Mybatis.ssm.service.BookService;
 6 import com.Mybatis.ssm.util.PageBean;
 7 import org.springframework.beans.factory.annotation.Autowired;
 8 import org.springframework.stereotype.Service;
 9 
10 import java.util.List;
11 
12 @Service
13 public class BookServiceImpl implements BookService {
14 
15 //    @Resource   相当于spring 自动装配中的byName;  @Autowired 相当于byType
16 
17     @Autowired
18     private BookMapper bookMapper;
19     @Override
20     public int deleteByPrimaryKey(Integer bid) {
21         return bookMapper.deleteByPrimaryKey(bid);
22     }
23 
24     @Override
25     public int insert(Book record) {
26         return bookMapper.insert(record);
27     }
28 
29     @Override
30     public int insertSelective(Book record) {
31         return bookMapper.insertSelective(record);
32     }
33 
34     @Override
35     public Book selectByPrimaryKey(Integer bid) {
36         return bookMapper.selectByPrimaryKey(bid);
37     }
38 
39     @Override
40     public int updateByPrimaryKeySelective(Book record) {
41         return bookMapper.updateByPrimaryKeySelective(record);
42     }
43 
44     @Override
45     public int updateByPrimaryKey(Book record) {
46         return bookMapper.updateByPrimaryKey(record);
47     }
48 
49     @Override
50     public List<Book> listPage(Book book, PageBean pageBean) {
51 
52         return bookMapper.listPage(book);
53     }
54 }

SpringBaseTest

 1 package com.Mybatis.ssm;
 2 
 3 import org.junit.runner.RunWith;
 4 import org.springframework.test.context.ContextConfiguration;
 5 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 6 
 7 @RunWith(SpringJUnit4ClassRunner.class)
 8 @ContextConfiguration(locations={"classpath:applicationContext.xml"})
 9 public class SpringJunitBaseTest {
10 
11 
12 }

BookServiceImplTest

测试

 1 package com.Mybatis.ssm.service.impl;
 2 
 3 import com.Mybatis.ssm.SpringJunitBaseTest;
 4 import com.Mybatis.ssm.model.Book;
 5 import com.Mybatis.ssm.service.BookService;
 6 import com.Mybatis.ssm.util.PageBean;
 7 import com.Mybatis.ssm.util.StringUtils;
 8 import org.junit.After;
 9 import org.junit.Before;
10 import org.junit.Test;
11 import org.springframework.beans.factory.annotation.Autowired;
12 
13 import java.util.List;
14 
15 import static org.junit.Assert.*;
16 
17 public class BookServiceImplTest extends SpringJunitBaseTest {
18 
19     @Autowired
20     private BookService bookService;
21     @Before
22     public void setUp() throws Exception {
23     }
24 
25     @After
26     public void tearDown() throws Exception {
27     }
28 
29     @Test
30     public void deleteByPrimaryKey() {
31         bookService.deleteByPrimaryKey(1);
32     }
33 
34     @Test
35     public void selectByPrimaryKey() {
36         System.out.println(this.bookService.selectByPrimaryKey(12));
37     }
38 
39 }

分页优化，使用AOP编程解决分页代码重复的问题

PagerAspect

 1 package com.Mybatis.ssm.component;
 2 
 3 import com.Mybatis.ssm.util.PageBean;
 4 import com.github.pagehelper.PageHelper;
 5 import com.github.pagehelper.PageInfo;
 6 import org.aspectj.lang.ProceedingJoinPoint;
 7 import org.aspectj.lang.annotation.Around;
 8 import org.aspectj.lang.annotation.Aspect;
 9 import sun.misc.Contended;
10 
11 import java.util.List;
12 
13 @Contended
14 @Aspect
15 public class PagerAspect {
16 
17     @Around("execution(* *..*Service.*Pager(..))")
18     public Object invoke(ProceedingJoinPoint args) throws Throwable{
19 //        符合* *..*Service.*Pager(..)规则的方法，调用时所携带的参数
20         Object[] args1 = args.getArgs();
21         PageBean pageBean = null;
22         for (Object o : args1) {
23             if (o instanceof PageBean) {
24                 pageBean = (PageBean) o;
25                 break;
26             }
27         }
28         if(pageBean != null && pageBean.isPagination()){
29             PageHelper.startPage(pageBean.getMaxPage(),pageBean.getRows());
30         }
31         Object list = args.proceed(args1);
32         if(pageBean != null && pageBean.isPagination()){
33             PageInfo pageInfo = new PageInfo((List)list);
34             pageBean.setTotal(pageInfo.getTotal()+"");
35         }
36         return list;
37     }
38 }

JUnit测试

BookServiceImplTest

 1 package com.Mybatis.ssm.service.impl;
 2 
 3 import com.Mybatis.ssm.SpringJunitBaseTest;
 4 import com.Mybatis.ssm.model.Book;
 5 import com.Mybatis.ssm.service.BookService;
 6 import com.Mybatis.ssm.util.PageBean;
 7 import com.Mybatis.ssm.util.StringUtils;
 8 import org.junit.After;
 9 import org.junit.Before;
10 import org.junit.Test;
11 import org.springframework.beans.factory.annotation.Autowired;
12 
13 import java.util.List;
14 
15 import static org.junit.Assert.*;
16 
17 public class BookServiceImplTest extends SpringJunitBaseTest {
18 
19     @Autowired
20     private BookService bookService;
21     @Before
22     public void setUp() throws Exception {
23     }
24 
25     @After
26     public void tearDown() throws Exception {
27     }
28 
29     @Test
30     public void listPage() {
31         Book book = new Book();
32         book.setBname(StringUtils.toLikeStr("圣墟"));
33         PageBean pageBean = new PageBean();
34         pageBean.setPagination(false);
35         List<Book> books = this.bookService.listPage(book, pageBean);
36         for (Book b : books){
37             System.out.println(b);
38         }
39 
40     }
41 }

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原文地址：https://www.cnblogs.com/xcn123/p/11708358.html