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呐喊教程网站的支持!
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