SpringBoot整合Mybatis圖文教程
這里介紹兩種整合SpringBoot和Mybatis的模式，分別是“全注解版” 和 “注解xml合并版”。
前期準(zhǔn)備
開發(fā)環(huán)境
開發(fā)工具：
IDEA
JDK：
1.8
技術(shù)：
SpringBoot、Maven、Mybatis
創(chuàng)建項目
項目結(jié)構(gòu)
Maven依賴
xml version="1.0"?encoding="UTF-8"?>
<project?xmlns="http://maven.apache.org/POM/4.0.0"?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
??xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
??<modelVersion>4.0.0modelVersion>
??<groupId>com.examplegroupId>
??<artifactId>demoartifactId>
??<version>0.0.1-SNAPSHOTversion>
??<packaging>jarpackaging>
??<name>demoname>
??<description>Demo project for Spring Bootdescription>
??<parent>
????<groupId>org.springframework.bootgroupId>
????<artifactId>spring-boot-starter-parentartifactId>
????<version>2.0.0.RELEASEversion>
????<relativePath/>?
??parent>
??<properties>
????<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
????<project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
????<java.version>1.8java.version>
??properties>
??<dependencies>
????<dependency>
??????<groupId>org.springframework.bootgroupId>
??????<artifactId>spring-boot-starter-webartifactId>
????dependency>
????<dependency>
??????<groupId>org.mybatis.spring.bootgroupId>
??????<artifactId>mybatis-spring-boot-starterartifactId>
??????<version>1.3.1version>
????dependency>
????<dependency>
??????<groupId>mysqlgroupId>
??????<artifactId>mysql-connector-javaartifactId>
??????<scope>runtimescope>
????dependency>
????<dependency>
??????<groupId>org.springframework.bootgroupId>
??????<artifactId>spring-boot-starter-testartifactId>
??????<scope>testscope>
????dependency>
??dependencies>
??<build>
????<plugins>
??????<plugin>
????????<groupId>org.springframework.bootgroupId>
????????<artifactId>spring-boot-maven-pluginartifactId>
??????plugin>
????plugins>
??build>
project>全注解版
SpringBoot配置文件
這里使用yml格式的配置文件，將application.properties改名為application.yml。
#配置數(shù)據(jù)源
spring:
??datasource:
?????url:?jdbc:mysql://127.0.0.1:3306/dianping?useUnicode=true&characterEncoding=utf8
?????username:?root
?????password:?123
?????driver-class-name: com.mysql.jdbc.DriverSpringBoot會自動加載application.yml相關(guān)配置，數(shù)據(jù)源就會自動注入到sqlSessionFactory中，sqlSessionFactory會自動注入到Mapper中。
實體類
public?class?Happiness?{
????private?Long id;
????private?String city;
????private?Integer num;
??//getters、setters、toString
}映射類
@Mapper
public interface HappinessDao {
????@Select("SELECT * FROM happiness WHERE city = #{city}")
????Happiness findHappinessByCity(@Param("city") String city);
????@Insert("INSERT INTO happiness(city, num) VALUES(#{city}, #{num})")
????int insertHappiness(@Param("city") String city, @Param("num") Integer num);
}Service類
事務(wù)管理只需要在方法上加個注解：@Transactional
@Service
public?class?HappinessService?{
????@Autowired
????private?HappinessDao happinessDao;
????public?Happiness selectService(String city){
????????return?happinessDao.findHappinessByCity(city);
????}
????@Transactional
????public?void?insertService(){
????????happinessDao.insertHappiness("西安", 9421);
????????int?a = 1?/ 0; //模擬故障
????????happinessDao.insertHappiness("長安", 1294);
????}
}Controller類
@RestController
@RequestMapping("/demo")
public class HappinessController {
????@Autowired
????private HappinessService happinessService;
????@RequestMapping("/query")
????public Happiness testQuery(){
????????return?happinessService.selectService("北京");
????}
????@RequestMapping("/insert")
????public?Happiness?testInsert(){
????????happinessService.insertService();
????????return?happinessService.selectService("西安");
????}
}測試
http://localhost:8080/demo/query
http://localhost:8080/demo/insert注解xml合并版
項目結(jié)構(gòu)
SpringBoot配置文件
#配置數(shù)據(jù)源
spring:
??datasource:
?????url:?jdbc:mysql://127.0.0.1:3306/dianping
?????username: root
?????password: 123
?????driver-class-name: com.mysql.jdbc.Driver
#指定mybatis映射文件的地址
mybatis:
??mapper-locations:?classpath:mapper/*.xml映射類
@Mapper
public?interface?HappinessDao {
????Happiness findHappinessByCity(String?city);
????int insertHappiness(HashMap<String, Object> map);
}映射文件
<mapper?namespace="com.example.demo.dao.HappinessDao">
????<select?id="findHappinessByCity"?parameterType="String"?resultType="com.example.demo.domain.Happiness">
????????SELECT * FROM happiness WHERE city = #{city}
????select>
????<insert?id="insertHappiness"?parameterType="HashMap"?useGeneratedKeys="true"?keyProperty="id">
????????INSERT INTO happiness(city, num) VALUES(#{city}, #{num})
????insert>
mapper>Service類
事務(wù)管理只需要在方法上加個注解：@Transactional
@Service
public?class?HappinessService?{
????@Autowired
????private?HappinessDao happinessDao;
????public?Happiness selectService(String city){
????????return?happinessDao.findHappinessByCity(city);
????}
????@Transactional
????public?void?insertService(){
????????HashMap map?= new?HashMap();
????????map.put("city", "西安");
????????map.put("num", 9421);
????????happinessDao.insertHappiness(map);
????????int?a = 1?/ 0; //模擬故障
????????happinessDao.insertHappiness(map);
????}
} Controller類
@RestController
@RequestMapping("/demo")
public class HappinessController {
????@Autowired
????private HappinessService happinessService;
????@RequestMapping("/query")
????public Happiness testQuery(){
????????return?happinessService.selectService("北京");
????}
????@RequestMapping("/insert")
????public?Happiness?testInsert(){
????????happinessService.insertService();
????????return?happinessService.selectService("西安");
????}
}測試
http://localhost:8080/demo/query
http://localhost:8080/demo/insert原文鏈接：csdn.net/litianxiang_kaola/article/details/79481422
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