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脚本之家网站的支持！
