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 {
    @Autowired
    JdbcTemplate 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 {
    @Autowired
    private UsersMapper usersMapper;
    @Override
    public int addUser(Users users) {
        return usersMapper.addUser(users);
    }

    @Override
    public int updateUser(Users users) {
        return usersMapper.updateUser(users);
    }

    @Override
    public int deleteByUserName(String userName) {
        return usersMapper.deleteByUserName(userName);
    }

    @Override
    public Users getByUserName(String userName) {
        return usersMapper.getByUserName(userName);
    }

    @Override
    public 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 {
    @Autowired
    private 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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