SSM整合篇】七. Spring+SpringMvc+MyBatis-Plus整合
MyBatis-Plus应用
github源码(day58-mybatis-plus) https://github.com/1196557363/ideaMavenProject
项目准备（day58-mybatis-plus）
- 导pom.xml
<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>mybatis-plusgroupId>
<artifactId>day58-mybatis-plusartifactId>
<version>1.0-SNAPSHOTversion>
<properties>
<spring.version>5.1.5.RELEASEspring.version>
properties>
<dependencies>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>1.0.18version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-coreartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aopartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-txartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.aspectjgroupId>
<artifactId>aspectjrtartifactId>
<version>1.8.0version>
dependency>
<dependency>
<groupId>org.aspectjgroupId>
<artifactId>aspectjweaverartifactId>
<version>1.8.0version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.26version>
dependency>
<dependency>
<groupId>org.apache.logging.log4jgroupId>
<artifactId>log4j-apiartifactId>
<version>2.5version>
dependency>
<dependency>
<groupId>org.apache.logging.log4jgroupId>
<artifactId>log4j-coreartifactId>
<version>2.5version>
dependency>
<dependency>
<groupId>org.apache.logging.log4jgroupId>
<artifactId>log4j-webartifactId>
<version>2.5version>
dependency>
<dependency>
<groupId>org.slf4jgroupId>
<artifactId>slf4j-log4j12artifactId>
<version>1.7.13version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<version>1.18.10version>
dependency>
<dependency>
<groupId>com.baomidougroupId>
<artifactId>mybatis-plusartifactId>
<version>2.3version>
dependency>
dependencies>
project>
- 创建数据库（day58-mybatis-plus）
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(8) NOT NULL AUTO_INCREMENT,
`name` varchar(20) DEFAULT NULL,
`age` int(3) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
INSERT INTO `user` VALUES ('1', 'jieKaMi', '22');
INSERT INTO `user` VALUES ('2', 'wpj', '24');
INSERT INTO `user` VALUES ('3', 'czy', '26');
- 写实体类 ( 让属性username跟字段name不一致）
package com.wpj.bean;
import com.baomidou.mybatisplus.annotations.*;
import com.baomidou.mybatisplus.enums.*;
import lombok.*;
/**
* ClassName: User
* Description:
* 使用lombok生成无参，全参，getter，setter，toString方法
* @author JieKaMi
* @version 1.0
* @date: 2020\1\11 0011 14:03
* @since JDK 1.8
*/
@Data
@TableName("user") // 指定User对应的表是user
public class User {
// 主键，自增
@TableId(type = IdType.AUTO)
private Integer id;
// 对象中的属性和表中的字段不一致，可以用@TableField建立关系 只对mybatis-plus提供的方法有效
@TableField(value = "name")
private String username;
// 属性跟字段相同不用管
private Integer age;
// 标识该属性无对应字段
@TableField(exist = false)
private String email;
}
- 写jdbc.properties
jdbc.dirver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/day58-mybatis-plus
jdbc.root=root
jdbc.pwd=123456
- 写配置文件 ( 无注释版，不懂可以看前几章）
DataSource会可能会报红，不用管。
5.1 spring-datasource.xml.
<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"
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">
<context:property-placeholder location="jdbc.properties" />
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${jdbc.dirver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.root}" />
<property name="password" value="${jdbc.pwd}" />
<property name="initialSize" value="5"/>
<property name="minIdle" value="5"/>
<property name="maxActive" value="10"/>
<property name="maxWait" value="10000"/>
bean>
beans>
5.2. spring-mybatis.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">
<bean id="sqlSessionFactory" class="com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="typeAliasesPackage" value="com.wpj.bean" />
<property name="mapperLocations" value="classpath:mapper/*.xml" />
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.wpj.mapper" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
bean>
beans>
3. spring-tx.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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/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">
<bean id="tx" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
bean>
<tx:advice id="txAdvice" transaction-manager="tx">
<tx:attributes>
<tx:method name="insert*" isolation="DEFAULT" propagation="REQUIRED" read-only="false"/>
<tx:method name="delete*" isolation="DEFAULT" propagation="REQUIRED" read-only="false"/>
<tx:method name="update*" isolation="DEFAULT" propagation="REQUIRED" read-only="false"/>
<tx:method name="get*" isolation="DEFAULT" propagation="REQUIRED" read-only="true"/>
<tx:method name="show*" isolation="DEFAULT" propagation="REQUIRED" read-only="true"/>
<tx:method name="find*" isolation="DEFAULT" propagation="REQUIRED" read-only="true"/>
<tx:method name="select*" isolation="DEFAULT" propagation="REQUIRED" read-only="true"/>
tx:attributes>
tx:advice>
<aop:config>
<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.wpj.service.*.* (..))" />
aop:config>
beans>
4. spring-context.xml
<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"
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">
<context:component-scan base-package="com.wpj" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Service" />
context:component-scan>
beans>
-
创建mapper,mapper.xml,service及其impl (service中注入dao) (源码github有)
-
测试环境
package com.wpj.service.impl;
import com.wpj.serivce.*;
import org.apache.ibatis.session.*;
import org.junit.*;
import org.junit.runner.*;
import org.springframework.beans.factory.annotation.*;
import org.springframework.test.context.*;
import org.springframework.test.context.junit.jupiter.*;
import org.springframework.test.context.junit4.*;
import javax.sql.*;
/**
* ClassName: TestProject
* Description:
*
* @author JieKaMi
* @version 1.0
* @date: 2020\1\11 0011 14:54
* @since JDK 1.8
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(value = {
"classpath:spring-datasource.xml",
"classpath:spring-mybatis.xml" ,
"classpath:spring-tx.xml" ,
"classpath:spring-context.xml"})
public class TestProject {
@Autowired
private DataSource dataSource;
@Autowired
private SqlSessionFactory sqlSessionFactory;
@Autowired
private IUserService iUserService;
@Test
public void testDataSource(){ System.out.println(dataSource); }
@Test
public void testSqlSessionFactory(){ System.out.println(sqlSessionFactory); }
@Test
public void testIUserService(){ System.out.println(iUserService); }
@Test
public void testGetAllUser(){ System.out.println(iUserService.getAllUser()); }
}
以上spring+springMvc+MyBatis-Plus整合
1. 使用MyBatis-Plus查询 (只能单表操作)
@Autowired
private IUserMapper iUserMapper;
@Test
public void testSelect(){
// 无条件查询
// List userList = iUserMapper.selectList(null); // 查询全部
// 条件查询
EntityWrapper<User> entityWrapper = new EntityWrapper<User>();
entityWrapper.eq("id",1); // 给了条件 id = 1
entityWrapper.gt("id",2); // id > 1
entityWrapper.lt("id",1); // id < 1
entityWrapper.like("name","a"); // 列名 模糊查询
entityWrapper.in("id",new Integer[]{1,2,3}); // 多查询
List<User> userList = iUserMapper.selectList(entityWrapper);
System.out.println(userList);
}
2. update同
3. 分页插件
3.1 xml设置插件
<bean id="sqlSessionFactory" class="com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="typeAliasesPackage" value="com.wpj.bean" />
<property name="mapperLocations" value="classpath:mapper/*.xml" />
<property name="plugins">
<array>
<bean class="com.baomidou.mybatisplus.plugins.PaginationInterceptor" />
array>
property>
bean>
3.2 test
