SpringBoot整合Mybatis(XML方式）

增加依赖

<!-- Springboot 整合MyBatis  -->
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.3.2</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		
		<!-- Druid 连接池 -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid-spring-boot-starter</artifactId>
			<version>1.1.9</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.1.10</version>
		</dependency>
		
		<!-- 分页插件 -->
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper-spring-boot-starter</artifactId>
			<version>1.2.2</version>
		</dependency>

• 配置文件yml

spring:
  http:
    encoding:
      force: true
      charset: utf-8
      enabled: true
  profiles:
    active: test,dev
  datasource:
    name: test
    url: jdbc:mysql://localhost:3306/test
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    druid:
      max-active: 20
      filters: stat
      max-wait: 60000
      initial-size: 1
      
server:
  tomcat:
    uri-encoding: utf-8
  port: 8888
  servlet:
    #项目访问路径
    context-path: /ssl
    application-display-name: application
    #项目访问路径
    path: /service
    
    #loging日志文件位置
logging:
  config: classpath:logback-spring.xml
  #mybatis 配置
mybatis:
  mapper-locations: classpath:mapper/*Mapper.xml
  config-location: classpath:mybatis/MyBatisConfig.xml
  #配置包 下面的POJO 类别名
  type-aliases-package: com.feifan.pojo
  
#分页插件 
pagehelper:
  helperDialect: mysql
  reasonable: true
  supportMethodsArguments: true
  params: count=countSql

• UserMapper.xml 文件

<?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.feifan.dao.UserMapper">
	<!-- <resultMap type="userMap" id="com.feifan.pojo.User">
		<id column="id" property="id"/>
	</resultMap>  -->

	<select id="selectAll" resultType="UserPOJO">
		select * from user 
	</select>
	
	<select id="selectById" resultType="UserPOJO">
		select * from user where id = #{id}
	</select>
	
	<insert id="insertUserPOJO" parameterType="UserPOJO" >
		insert into user (username,gender,age)values(#{username},#{gender},#{age})
	</insert>
	
	<update id="updateUser" parameterType="UserPOJO">
		update user set username=#{username},gender=#{gender},age=#{age} where id=#{id}
	</update>
</mapper>

• service

public interface UserService {
	
	//查找用户
	UserPOJO selectById(int id);

	//增加用户
	void addUser(UserPOJO userPOJO);
	
	//分页查找用户
	List<UserPOJO> selectAll(int page,int rows);
	
	//更新用户
	void update(UserPOJO userPOJO);
}

• 启动主类

@MapperScan(basePackages= {"com.feifan.dao"})//mapper dao层 单独配置扫描

• mybatis.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
    PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
	<settings>
		<!-- 开启驼峰匹配 -->
		<setting name="mapUnderscoreToCamelCase" value="true" />
	</settings>

</configuration>

注解方式:

applcation.properties

spring.datasource.drive-class-name=com.mysql.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.url=jdbc:mysql://localhost:3306/chat
#处理浏览器响应乱码
spring.http.encoding.force=true

启动类：

//@MapperScan("com.feifan.dao")//接口扫描 在接口上标准 @mapper 此处可以省略

• 接口扫描

@Mapper//@MapperScan("com.feifan.dao")//接口扫描
public interface UserMapper {
	
	@Select("select * from tb_user where id=#{id}")
	User findUserById( Integer id);
	
	@Insert("insert into tb_user (name,pw,age,email,gender,signtime,create_who)values(#{name},#{pw},#{age},#{email},#{gender},#{signtime},#{createWho})")
	void insertUser(User user);
	
	@Insert("insert into tb_user (name,pw)values(#{name},#{pw})")
	void insertUserByName(@Param("name")String name,@Param("pw")String pw);
	
}

SpringBoot 区分多数据源

• 区分多个数据源
  – 通过包区分
  – 使用注解