SpringBoot整合mybatis
pom添加Mybatis与mysql依赖
<properties>
<mybatis-spring-boot>1.3.0</mybatis-spring-boot>
<mysql-connector>5.1.39</mysql-connector>
</properties>
<!-- Spring Boot Mybatis 依赖 -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis-spring-boot}</version>
</dependency>
<!-- MySQL 连接驱动依赖 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-connector}</version>
</dependency>
整个工程的pom文件
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>cn.limbo</groupId>
<artifactId>spring-boot-database</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-boot-database</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<mybatis-spring-boot>1.3.0</mybatis-spring-boot>
<mysql-connector>5.1.39</mysql-connector>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Spring Boot Mybatis 依赖 -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis-spring-boot}</version>
</dependency>
<!-- MySQL 连接驱动依赖 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-connector}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
修改application.properties
添加数据库和Mybatis的配置
## 数据源配置
spring.datasource.url=jdbc:mysql://localhost:3306/springbootdb_cluster?autoReconnect=true&useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
## Mybatis 配置
mybatis.typeAliasesPackage=cn.limbo.domain
mybatis.mapperLocations=classpath:mapper/*.xml
mybatis.typeAliasesPackage 配置为 cn.limbo.domain，指向实体类包路径。mybatis.mapperLocations 配置为 classpath 路径下 mapper 包下，* 代表会扫描所有 xml 文件。
mybatis 其他配置相关详解如下
mybatis.config = mybatis 配置文件名称
mybatis.mapperLocations = mapper xml 文件地址
mybatis.typeAliasesPackage = 实体类包路径
mybatis.typeHandlersPackage = type handlers 处理器包路径
mybatis.check-config-location = 检查 mybatis 配置是否存在，一般命名为 mybatis-config.xml
mybatis.executorType = 执行模式。默认是 SIMPLE
在 Application 应用启动类添加注解 MapperScan
@SpringBootApplication
//mapper 接口扫描包
@MapperScan("cn.limbo.dao")
@ComponentScan
@EnableAutoConfiguration
public class SpringBootDatabaseApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootDatabaseApplication.class, args);
}
}
mapper 接口类扫描包配置注解 MapperScan ：用这个注解可以注册 Mybatis mapper 接口类。
整个项目的目录结构如下：
表结构如下：
为了程序的健壮心，我还做了简单的异常处理，以及使用slf4j打印sql日志
具体的注解代码看工程吧。
坑点
-
我想说一下关于Mybatis取数据的问题 — mybatis查询不到数据，而直接执行SQL可以执行：
涉及到中文字符的东西，需要在数据库地址后面添加?autoReconnect=true&useUnicode=true&characterEncoding=utf8，否则很容易找不到东西