SpringBoot + mybatis預設配置與手動配置步驟對比一（預設配置）
前提環境已經搭建完成
Eclipse + SpringBoot + mybatis預設配置：
1.建立工程
File->new->other->Spring Boot -> Spring Starter Project ->選擇jdk等資訊 -> 點選Web，選擇Web，然後點選SQL，選擇JPA、Mybatis、MYSQL，點選next，Finish。
2.開始編碼
2.1修改application.properties
spring.datasource.url=
spring.datasource.username=
spring.datasource.password=
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
2.2建立實體類
package com.lele.demo.entity;
import java.util.Date;
public class User {
private Integer PUB_USER_ID;
private String LOGIN_NAME;
private String PASSWORD;
//...
public Integer getPubUserId() {
return PUB_USER_ID;
}
public void setPubUserId(Integer PUB_USER_ID) {
this.PUB_USER_ID = PUB_USER_ID;
}
//...省略
}
2.3建立Mapper(注意Interface檔案是介面，不是Class--類中方發要有實現內容的， 介面可以只有方法名不用寫方法的具體實現， 具體拉到最後看區別)
package com.lele.demo.DAO;
import java.util.List;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
@Mapper
public interface UserMapper {
/** * 根據主鍵查詢單個 * * @param id * @return */
@Select("select TEL from pisp_pub_user where PUB_USER_ID=#{id}")
List<String> selectById(@Param("id") Long id);
}
2.4建立Dao
package com.lele.demo.dao;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DataAccessException;
import org.springframework.stereotype.Repository;
import com.lele.demo.mapper.UserMapper;
import com.lele.demo.model.User;
@Repository
public class UserDao {
@Autowired
private UserMapper userMapper;
public User selectUserById(Long id) throws DataAccessException {
return userMapper.selectUserById(id);
}
}
2.5建立Controller
package com.lele.demo.Controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.lele.demo.dao.UserDao;
import com.lele.demo.model.User;
@EnableTransactionManagement // 需要事務的時候加上
@RestController
public class UserController {
@Autowired
private UserDao userDao;
@RequestMapping("/selectUserById/{id}")
public User selectUserById(@PathVariable("id") Long id) {
return userDao.selectUserById(id);
}
}
2.6執行
2.7開啟瀏覽器訪問
http://127.0.0.1:8080/selectUserById/2