07_Spring Boot 整合 Mybatis 的完整 Web 案例
1、pom.xml配置
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
2、application.properties 配置
## 数据源配置
spring.datasource.url=jdbc:mysql://localhost:3306/springbootdb?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
## Mybatis 配置
mybatis.typeAliasesPackage=com.linjb.model
mybatis.mapperLocations=classpath:mapper/*.xml
mybatis.typeAliasesPackage 配置为 org.spring.springboot.domain，指向实体类包路径。mybatis.mapperLocations 配置为 classpath 路径下 mapper 包下，* 代表会扫描所有 xml 文件。
mybatis 其他配置相关详解如下：
mybatis.config = mybatis 配置文件名称 mybatis.mapperLocations = mapper xml 文件地址 mybatis.typeAliasesPackage = 实体类包路径 mybatis.typeHandlersPackage = type handlers 处理器包路径 mybatis.check-config-location = 检查 mybatis 配置是否存在，一般命名为 mybatis-config.xml mybatis.executorType = 执行模式。默认是 SIMPLE
3、Application 启动类
package com.linjb;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
//mapper 接口类扫描包配置
@MapperScan("com.linjb.dao")
public class Application {
public static void main(String[] args) {
// 程序启动入口
// 启动嵌入式的 Tomcat 并初始化 Spring 环境及其各 Spring 组件
SpringApplication.run(Application.class,args);
}
}
mapper 接口类扫描包配置注解 MapperScan ：用这个注解可以注册 Mybatis mapper 接口类。
4、Model 层
package com.linjb.model;
public class College {
private Integer collegeId;
private String collegeName;
public Integer getCollegeId() {
return collegeId;
}
public void setCollegeId(Integer collegeId) {
this.collegeId = collegeId;
}
public String getCollegeName() {
return collegeName;
}
public void setCollegeName(String collegeName) {
this.collegeName = collegeName;
}
}
5、Dao 层
package com.linjb.dao;
import com.linjb.model.College;
public interface CollegeDao {
public College findByName(String collegeName);
}
6、Mapper.xml 文件
CollegeMapper.xml
college_id,college_name
select
from college
where college_name = #{collegeName}
7、Controller 层
package com.linjb.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.linjb.dao.CollegeDao;
import com.linjb.model.College;
@RestController
@RequestMapping(value="/college")
public class CollegeController {
@Autowired
private CollegeDao collegeDao;
@RequestMapping(value = "/findCollegeByName", method = RequestMethod.GET)
public College findCollegeByName(@RequestParam(value = "collegeName", required = true) String collegeName) {
return collegeDao.findByName(collegeName);
}
}
运行结果：
