一、概述
1.先导
mybatis入门随笔：http://www.cnblogs.com/jiangbei/p/6884641.html
2.引入依赖
<dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.0</version> </dependency>
//其他必须的依赖还包括mysql连接，web依赖（web项目），此处贴出完整依赖（有部分依赖例如jpa此处可不选）
<?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>com.example</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>springboot_demo</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.4.7.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> </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> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <!--spring-boot-starter-data-jpa包含spring-data-jpa、spring-orm 和 Hibernate 来支持 JPA--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <!-- mysql连接--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <!-- mybatis--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.0</version> </dependency> <!-- 阿里druid连接池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.6</version> </dependency> <!-- AOP支持--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency> <!-- spring-boot-devtools热部署支持--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <dependencies> <!-- spring热部署 --> <!-- <dependency> <groupId>org.springframework</groupId> <artifactId>springloaded</artifactId> <version>1.2.6.RELEASE</version> </dependency>--> </dependencies> </plugin> </plugins> </build> </project>
额外功能（后文陆续补充）
-
- PageHelper 分页插件
- mybatis generator 自动生成代码插件
3.数据源配置
依旧是前文的druid数据源
spring:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driverClassName: com.mysql.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/sakila
username: root
password: root
# druid配置项，默认spring-boot不支持，故需要config类来解析
initialSize: 5
minIdle: 5
maxActive: 20
maxWait: 60000
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
maxPoolPreparedStatementPerConnectionSize: 20
filters: stat,wall,log4j
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
4.起步
以下介绍两种整合方式：
传统的mapper.xml映射文件
springboot提倡的无配置注解形式
二、无配置注解形式
1.配置mybatis：
mybatis:
type-aliases-package: com.example.demo.bean
2.Bean
沿用之前的bean：girl
package com.example.demo.bean; import javax.validation.constraints.Min; import javax.validation.constraints.Size; /** * girl的bean * * @author zcc ON 2018/2/9 **/ public class Girl { private Integer id; @Size(min = 3, max = 8, message = "名称长度不合法！") private String name; @Min(value = 18, message = "未成年禁止入内！") private Integer age; public Girl() { } public Girl(String name, Integer age) { this.name = name; this.age = age; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } @Override public String toString() { return "Girl{" + "id=" + id + ", name=‘" + name + ‘\‘‘ + ", age=" + age + ‘}‘; } }
3.Mapper
package com.example.demo.mapper;
import com.example.demo.bean.Girl;
import org.apache.ibatis.annotations.*;
import java.util.List;
/**
* GirlMapper
*
* @author zcc
**/
// @Mapper 这里可以使用@Mapper注解，但是每个mapper都加注解比较麻烦，所以也可以统一配置@MapperScan在扫描路径在application类中
@Mapper
public interface GirlMapper {
@Select("SELECT * FROM girl WHERE id = #{id}")
Girl findGirlById(Integer id);
@Select("SELECT * FROM girl")
List<Girl> findAll();
@Insert("INSERT INTO girl VALUES(NULL,#{age},#{name})")
int addGirl(Girl girl);
@Update("UPDATE girl SET age = #{girl.age},name = #{girl.name} WHERE id = #{id}")
int updateGirl(@Param("id") Integer id, @Param("girl") Girl girl);
@Delete("DELETE FROM girl WHERE id = #{id}")
int deleteGirl(Integer id);
}
以上注解的使用基本与之前xml中的用法一致，完整注解，参考官网：http://www.mybatis.org/mybatis-3/zh/java-api.html
