Spring Boot+Mybatis的整合过程

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的整合过程网站的支持！

来源：http://blog.csdn.net/new_huiyuan/article/details/74627432