这篇文章主要介绍了SpringBoot整合mybatis简单案例过程解析,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
1.在springboot项目中的pom.xml中添加mybatis的依赖
- <dependency>
- <groupId>org.mybatis.spring.boot</groupId>
- <artifactId>mybatis-spring-boot-starter</artifactId>
- <version>1.1.1</version>
- </dependency>
2.在src/main/resources/application.yml中配置数据源信息
- # DB Configation
- spring:
- datasource:
- driver-class-name: com.mysql.jdbc.Driver
- url: jdbc:mysql://127.0.0.1:3306/springboot?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone = GMT
- username: root
- password: root
-
- # JAPConfigration
- jpa:
- database: mysql
- show-sql: true
- generate-ddl: true
在连接数据库的过程中可能会出现SQLException,可能是时区问题导致的,加上url路径后面的“serverTimezone = GMT”即可
3.在主启动类的同级创建po包和mapper包,在po包中创建实体类,编写pojo;在mapper包中创建mapper接口和mapper映射文件
mapper.java
- package com.hxy.springbootdemo1.demo.mapper;
-
- import com.hxy.springbootdemo1.demo.pojo.MUser;
-
- import java.util.List;
-
- public interface UserMapper {
- List<MUser> getUserList();
- }
mapper.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.hxy.springbootdemo1.demo.mapper.UserMapper">
- <select id="getUserList" resultType="com.hxy.springbootdemo1.demo.pojo.MUser">
- select * from user
- </select>
- </mapper>
4.手动配置mybatis的包扫描
在主启动类添加@MapperScan
如果出现错误:org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.offcn.mapper.UserMapper.getUserList
有如下两种方法解决:
1 把映射文件 放到resources 目录下 结构目录一模一样
2 修改配置文件pom.xml
- <build>
- <resources>
- <resource>
- <directory>src/main/java</directory>
- <includes>
- <include>**/*.properties</include>
- <include>**/*.xml</include>
- </includes>
- <filtering>false</filtering>
- </resource>
- <resource>
- <directory>src/main/resources</directory>
- <includes>
- <include>**/*.*</include>
- </includes>
- <filtering>false</filtering>
- </resource>
- </resources>
- </build>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持w3xue。