这里有新鲜出炉的MyBatis教程,程序狗速度看过来!
MyBatis 本是apache的一个开源项目iBatis, 2010年这个项目由apache software foundation 迁移到了google code,并且改名为MyBatis 。
这篇文章主要介绍了Spring Boot+Mybatis的整合过程,需要的朋友可以参考下
依赖配置
结合前面的内容,这里我们要嵌入数据库的操作,这里以操作MySQL为例整合Mybatis,首先需要在原来的基础上添加以下依赖
- <!-- mybatis依赖 -->
- <dependency>
- <groupId>org.mybatis.spring.boot</groupId>
- <artifactId>mybatis-spring-boot-starter</artifactId>
- <version>1.1.1</version>
- </dependency>
当然啦,只依赖mybatis是不够的还需要依赖jdbc驱动以及返回json数据的json库(格式化数据)
- <!-- MySql驱动 -->
- <dependency>
- <groupId>org.apache.tomcat</groupId>
- <artifactId>tomcat-jdbc</artifactId>
- </dependency>
- <dependency>
- <groupId>mysql</groupId>
- <artifactId>mysql-connector-java</artifactId>
- <version>5.1.21</version>
- </dependency>
- <!--Json库的依赖 -->
- <dependency>
- <groupId>com.alibaba</groupId>
- <artifactId>fastjson</artifactId>
- <version>1.1.43</version>
- </dependency>
应用配置
接着需要在application.properties中添加数据库配置
- #JDBC配置
- spring.datasource.url=jdbc:mysql://127.0.0.1:3306/weibo?useUnicode=true&characterEncoding=gbk&zeroDateTimeBehavior=convertToNull
- spring.datasource.username=root
- spring.datasource.password=root
- spring.datasource.driver-class-name=com.mysql.jdbc.Driver
这里连接的数据库名叫weibo,其中表结构如下:
接下来就需要来具体的初始化MyBatis配置以及数据表的操作了,先看一下工程结构
编写配置类
数据库相关的DataSource,SqlSeesion配置,其中DataSourse的配置可以理解为解读application.properties中的jdbc相关配置然后初始化JDBC驱动的,SqlSeesion配置主要是针对Mybatis使用事务操作时的配置信息。
- package com.example.demo.config;
- import javax.sql.DataSource;
- import org.apache.ibatis.session.SqlSessionFactory;
- import org.mybatis.spring.SqlSessionFactoryBean;
- import org.mybatis.spring.annotation.MapperScan;
- import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
- import org.springframework.boot.context.properties.ConfigurationProperties;
- import org.springframework.context.annotation.Bean;
- import org.springframework.context.annotation.ComponentScan;
- import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
- import org.springframework.jdbc.datasource.DataSourceTransactionManager;
- import org.springframework.transaction.PlatformTransactionManager;
- @EnableAutoConfiguration
- @ComponentScan
- @MapperScan("com.example.demo.mapper")
- public class JdbcConfig {
- // DataSource配置
- @Bean
- @ConfigurationProperties(prefix = "spring.datasource")
- public DataSource dataSource() {
- return new org.apache.tomcat.jdbc.pool.DataSource();
- }
- // 提供SqlSeesion(数据库事务操作相关的配置)
- @Bean
- public SqlSessionFactory sqlSessionFactoryBean() throws Exception {
- SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
- sqlSessionFactoryBean.setDataSource(dataSource());
- PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
- sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:/mybatis/*.xml"));
- return sqlSessionFactoryBean.getObject();
- }
- @Bean
- public PlatformTransactionManager transactionManager() {
- return new DataSourceTransactionManager(dataSource());
- }
- }
添加Pojo类
该类主要接收数据表中的数据,所以属性基本上跟数据表的属性一致
- package com.example.demo.bean;
- public class Diary {
- private int id;
- private String title;
- private String content;
- private String pubTime;
- private int userId;
- public int getId() {
- return id;
- }
- public void setId(int id) {
- this.id = id;
- }
- public String getTitle() {
- return title;
- }
- public void setTitle(String title) {
- this.title = title;
- }
- public String getContent() {
- return content;
- }
- public void setContent(String content) {
- this.content = content;
- }
- public String getPubTime() {
- return pubTime;
- }
- public void setPubTime(String pubTime) {
- this.pubTime = pubTime;
- }
- public int getUserId() {
- return userId;
- }
- public void setUserId(int userId) {
- this.userId = userId;
- }@Override public String toString() {
- return "Diary [id=" + id + ", title=" + title + ", content=" + content + ", pubTime=" + pubTime + ", userId=" + userId + "]";
- }
- }
添加数据表操作接口
该类描述了操作数据表的过程,SprintBoot在运行中会根据类上的@Mapper注解找到它,因此不能落下这个注解
- package com.example.demo.mapper;
- import org.apache.ibatis.annotations.Mapper;
- import org.apache.ibatis.annotations.Param;
- import org.apache.ibatis.annotations.Select;
- import com.example.demo.bean.Diary;
- @Mapper
- public interface DiaryMapper {
- @Select("select * from diary where _id = #{id}")
- public Diary getDiaryById(@Param("id")Integer id);
- }
使用
- package com.example.demo.controller;
- import org.springframework.beans.factory.annotation.Autowired;
- import org.springframework.web.bind.annotation.RequestMapping;
- import org.springframework.web.bind.annotation.RestController;
- import com.alibaba.fastjson.JSON;
- import com.example.demo.bean.Diary;
- import com.example.demo.mapper.DiaryMapper;
- @RestController
- public class DiaryMappingController {
- @Autowired
- DiaryMapper diaryMapper;
- @RequestMapping("/diary")
- public String getDiary(Integer id){
- Diary d = diaryMapper.getDiaryById(id);
- String json = JSON.toJSONString(d);
- return json;
- }
- }
最后运行SpringBoot项目,然后在浏览器上输入网址:
http://localhost:8080/diary?id=2
这样即可看到结果
到此SpringBoot+Mybatis的整合就完成了
源码:https://github.com/huajianzh/spring/tree/master/springdemo
以上所述是小编给大家介绍的Spring Boot+Mybatis的整合过程,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对PHPERZ网站的支持!
来源: http://www.phperz.com/article/17/1206/356604.html