1.构建Springboot项目

利用springboot整合jdbctemplate,并不需要导入其他的依赖，具体的项目结构图如图

2.写domain层

数据库映射的实体类

package com.jkk.springboot_jdbc_template.domain;/*** @author jkk*/import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;import java.io.Serializable;/*** Users类将数据库中的users表映射在一起* @author jkk* @see java.io.Serializable*/
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class Users implements Serializable {private String username;private String password;private String idNumber;private String phoneNumber;private String gender;private String dataStatus;private static final long serialVersionUID = 1L;
}

3.mapper层

是对数据库的操作，可以直接注入

package com.jkk.springboot_jdbc_template.mapper;import com.jkk.springboot_jdbc_template.domain.Users;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;import java.util.List;/*** 这一层是数据库访问层.* <p>主要是对数据库的增删查改</p>* @author jkk*/
@Repository
public class UsersMapper {@AutowiredJdbcTemplate jdbcTemplate;public int addUser(Users users){return jdbcTemplate.update("insert into users(username,password,id_number,phone_number,gender,data_status) values (?,?,?,?,?,?)",users.getUsername(),users.getPassword(),users.getIdNumber(),users.getPhoneNumber(),users.getGender(),users.getDataStatus());}public int updateUser(Users users){return jdbcTemplate.update("update users set password=?,id_number=?,phone_number=?,gender=?,data_status=? where username=?",users.getPassword(),users.getIdNumber(),users.getPhoneNumber(),users.getGender(),users.getDataStatus(),users.getUsername());}public int deleteByUserName(String userName){return jdbcTemplate.update("delete from users where username = ?",userName);}public Users getByUserName(String userName){return jdbcTemplate.queryForObject("select * from users where username = ?",new BeanPropertyRowMapper<>(Users.class),userName);}public List<Users> getAllUser(){return jdbcTemplate.query("select * from users",new BeanPropertyRowMapper<>(Users.class));}
}

4.service层

package com.jkk.springboot_jdbc_template.service;import com.jkk.springboot_jdbc_template.domain.Users;
import org.springframework.stereotype.Service;import java.util.List;/*** @author jkk*/
public interface UserService {/*** 添加用户信息* @param users* @return*/public int addUser(Users users);/*** 修改用户信息* @param users* @return*/public int updateUser(Users users);/*** 删除用户信息* @param userName* @return*/public int deleteByUserName(String userName);/*** 查找单个信息* @param userName* @return*/public Users getByUserName(String userName);/*** 查询所有信息* @return*/public List<Users> getAllUser();
}

package com.jkk.springboot_jdbc_template.service.impl;import com.jkk.springboot_jdbc_template.domain.Users;
import com.jkk.springboot_jdbc_template.mapper.UsersMapper;
import com.jkk.springboot_jdbc_template.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;/***具体的业务逻辑层.* @see com.jkk.springboot_jdbc_template.service.UserService* @author jkk*/
@Service
public class UserServiceImpl implements UserService {@Autowiredprivate UsersMapper usersMapper;@Overridepublic int addUser(Users users) {return usersMapper.addUser(users);}@Overridepublic int updateUser(Users users) {return usersMapper.updateUser(users);}@Overridepublic int deleteByUserName(String userName) {return usersMapper.deleteByUserName(userName);}@Overridepublic Users getByUserName(String userName) {return usersMapper.getByUserName(userName);}@Overridepublic List<Users> getAllUser() {return usersMapper.getAllUser();}
}

5.controller层

package com.jkk.springboot_jdbc_template.controller;import com.jkk.springboot_jdbc_template.domain.Users;
import com.jkk.springboot_jdbc_template.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.List;/*** @author jkk*/
@RestController
public class UsersController {@Autowiredprivate UserService userService;@GetMapping("/user")public String userTest(){Users users = new Users();users.setUsername("test4");users.setPassword("test4");users.setIdNumber("444");users.setPhoneNumber("444");users.setGender("男");users.setDataStatus("0");int add = userService.addUser(users);int delete = userService.deleteByUserName("test3");users.setPhoneNumber("555");int update = userService.updateUser(users);Users test4 = userService.getByUserName("test4");System.out.println(test4);List<Users> allUser = userService.getAllUser();System.out.println(allUser);
//        return "插入了"+add+"行，删除了"+delete+"行，更新了"+update+"行";return test4.toString();}
}

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