springboot和mybatis集成

springboot和mybatis集成

pom

 <?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.liwei</groupId>
     <artifactId>leshop</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>leshop</name>
     <description>Demo project for Spring Boot</description>
 ​
     <properties>
         <java.version>1.8</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <spring-boot.version>2.3.7.RELEASE</spring-boot.version>
     </properties>
 ​
     <dependencies>
         <!-- spring boot的核心starter -->
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
         <!-- spring boot提供的辅助开发工具 -->
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-devtools</artifactId>
             <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>org.mybatis.spring.boot</groupId>
             <artifactId>mybatis-spring-boot-starter</artifactId>
             <version>2.1.0</version>
         </dependency>
         <!-- MySQL数据库连接需要的依赖 -->
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
             <scope>runtime</scope>
         </dependency>
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>druid</artifactId>
             <version>1.1.6</version>
         </dependency>
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
             <version>1.2.17</version>
         </dependency>
 ​
         <!-- json处理相关的依赖 -->
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
             <version>1.2.45</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter</artifactId>
         </dependency>
         <!-- 系统监控相关的依赖 -->
         <!-- 系统监控相关的依赖 -->
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
         <!-- cglib的BeanCopier需要的依赖 -->
         <dependency>
             <groupId>asm</groupId>
             <artifactId>asm</artifactId>
             <version>3.3.1</version>
         </dependency>
         <dependency>
             <groupId>asm</groupId>
             <artifactId>asm-commons</artifactId>
             <version>3.3.1</version>
         </dependency>
         <dependency>
             <groupId>asm</groupId>
             <artifactId>asm-util</artifactId>
             <version>3.3.1</version>
         </dependency>
         <dependency>
             <groupId>cglib</groupId>
             <artifactId>cglib-nodep</artifactId>
             <version>2.2.2</version>
         </dependency>
         <!-- 测试需要的依赖 -->
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
         </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
         </dependency>
     </dependencies>
 ​
     <dependencyManagement>
         <dependencies>
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
                 <version>${spring-boot.version}</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
         </dependencies>
     </dependencyManagement>
 ​
     <build>
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
                     <encoding>UTF-8</encoding>
                 </configuration>
             </plugin>
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
                 <version>2.3.7.RELEASE</version>
                 <configuration>
                     <mainClass>com.liwei.leshop.LeshopApplication</mainClass>
                 </configuration>
                 <executions>
                     <execution>
                         <id>repackage</id>
                         <goals>
                             <goal>repackage</goal>
                         </goals>
                     </execution>
                 </executions>
             </plugin>
         </plugins>
     </build>
 ​
 </project>
 ​

propertys

 # 应用名称
 spring.application.name=leshop
 server.port=8080
 spring.datasource.username=iexe
 spring.datasource.password=Shgbit123!@#
 spring.datasource.url=jdbc:mysql://47.103.165.132:3306/eshop?useUnicode=true&characterEncoding=utf-8  
 #spring.datasource.driver-class-name=com.mysql.jdbc.Driver
 mybatis.mapper-locations=classpath:mapper/*Mapper.xml
 mybatis.type-aliases-package=com.liwei.leshop.domain
 logging.level.com.example.mapper=debug
 spring.datasource.driverClassName=com.mysql.jdbc.Driver
 # 连接池的配置信息
 spring.datasource.initialSize=50  
 spring.datasource.minIdle=50  
 spring.datasource.maxActive=500  
 spring.datasource.maxWait=60000  
 spring.datasource.timeBetweenEvictionRunsMillis=60000  
 spring.datasource.minEvictableIdleTimeMillis=300000  
 spring.datasource.validationQuery=SELECT 1 FROM DUAL  
 spring.datasource.testWhileIdle=true  
 spring.datasource.testOnBorrow=false  
 spring.datasource.testOnReturn=false  
 spring.datasource.poolPreparedStatements=true  
 spring.datasource.maxPoolPreparedStatementPerConnectionSize=20  
 spring.datasource.filters=stat,wall,log4j  
 spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

启动类

 /**
  * 集成springboot，mybatis
  */
 @MapperScan("com.liwei.leshop.dao")//使用MapperScan批量扫描所有的Mapper接口；
 @SpringBootApplication
 public class LeshopApplication {
 ​
     public static void main(String[] args) {
         SpringApplication.run(LeshopApplication.class, args);
     }
 ​
 }
 ​

dao

 @Repository
 public interface UserMapper {
     List<User> findAll();
 }
 ​

实体类

 @Data
 public class User {
     private String id;//编号
     private String username;//用户名
     private String password;//密码
 }
 ​

resource/mapper/UserMapper.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 <mapper namespace="com.liwei.leshop.dao.UserMapper">
     <resultMap id="BaseResultMap" type="com.liwei.leshop.domain.User">
         <result column="id" jdbcType="VARCHAR" property="id" />
         <result column="userName" jdbcType="VARCHAR" property="username" />
         <result column="passWord" jdbcType="VARCHAR" property="password" />
     </resultMap>
     <select id="findAll" resultType="com.liwei.leshop.domain.User">
         select * from user
     </select>
 ​
 </mapper>

数据库

 ​
 CREATE TABLE `user` (
   `id` varchar(32) NOT NULL AUTO_INCREMENT,
   `userName` varchar(32) NOT NULL,
   `passWord` varchar(50) NOT NULL,
   `realName` varchar(32) DEFAULT NULL,
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
 ​

test

 package com.liwei.leshop.dao;
 ​
 import com.liwei.leshop.LeshopApplication;
 import com.liwei.leshop.domain.User;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.junit4.SpringRunner;
 ​
 import java.util.List;
 ​
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = LeshopApplication.class)
 ​
 public class UserMapperTest {
 @Autowired
     private UserMapper userMapper;
     @Test
     public void findAll() {
         List<User> all = userMapper.findAll();
         System.out.println(all);
     }
 }