SpringBoot+JdbcTemplates访问Mysql

一、引入依赖：

SpringBoot版本：

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.0.RELEASE</version>
    </parent>

在pom文件引入spring-boot-starter-jdbc的依赖：

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

mysql连接：
 

         <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

配置相关文件

在application.properties文件配置mysql的驱动类，数据库地址，数据库账号、密码信息。

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/db?useUnicode=true&characterEncoding=utf-8&useSSL=false
spring.datasource.username=root
spring.datasource.password=******

二、具体编码

实体类（Entity）

package com.yms.demo.domain.pojo;

import java.io.Serializable;
import java.util.Date;

public class CeNote implements Serializable{
    private Integer id;

    private String noterId;

    private Integer courseId;

    private Integer videoId;

    private String content;

    private Integer favourNum;

    private String time;

    get...set....
}

dao层

interface:

package com.yms.demo.dao;

import com.yms.demo.domain.pojo.CeNote;

import java.util.List;

public interface CeNoteRepo {

    public List<CeNote> findAll();

    public CeNote findOne(Integer id);

    public int add(CeNote note);

    public int update(CeNote note);

    public int delete(Integer id);

}

Impl:
 

package com.yms.demo.dao.impl;

import com.yms.demo.dao.CeNoteRepo;
import com.yms.demo.domain.pojo.CeNote;
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;

@Repository
public class CeNoteRepoImpl implements CeNoteRepo {

    @Autowired
    private JdbcTemplate jdbcTemplate;

    @Override
    public List<CeNote> findAll() {

        List<CeNote> res = jdbcTemplate.query("select * from ce_note", new Object[]{},
                new BeanPropertyRowMapper(CeNote.class));

        return res;
    }

    @Override
    public CeNote findOne(Integer id) {

        List<CeNote> res = jdbcTemplate.query("select * from ce_note where id = ?",new Object[]{id},
                new BeanPropertyRowMapper(CeNote.class));

        if(res!=null && res.size()>0){
            return res.get(0);
        }else{
            return null;
        }
    }

    @Override
    public int add(CeNote note) {
        return jdbcTemplate.update("INSERT INTO ce_note(noter_id,course_id,video_id,content,favour_num,time)" +
                        " VALUES (?,?,?,?,?,?)",
                note.getNoterId(),note.getCourseId(),note.getVideoId(),note.getContent(),note.getFavourNum(),
                note.getTime());
    }

    @Override
    public int update(CeNote note) {
        return jdbcTemplate.update("UPDATE ce_note set noter_id=?,course_id=?,video_id=?,content=?,favour_num=?,time=? where id=?",
                note.getNoterId(),note.getCourseId(),note.getVideoId(),note.getContent(),note.getFavourNum(),
                note.getTime(),note.getId());
    }

    @Override
    public int delete(Integer id) {
        return jdbcTemplate.update("DELETE FROM TABLE ce_note WHERE id=?",id);
    }
}

service层

interface:

package com.yms.demo.service;

import com.yms.demo.domain.pojo.CeNote;

import java.util.List;

public interface CeNoteService {

    public List<CeNote> findAll();

    public CeNote findOne(Integer id);

    public int add(CeNote note);

    public int update(CeNote note);

    public int delete(Integer id);

}

Impl:

package com.yms.demo.service.impl;

import com.yms.demo.common.utils.DateHelpler;
import com.yms.demo.dao.CeNoteRepo;
import com.yms.demo.domain.pojo.CeNote;
import com.yms.demo.service.CeNoteService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class CeNoteServiceImpl implements CeNoteService {


    @Autowired
    private CeNoteRepo ceNote;

    @Override
    public List<CeNote> findAll() {
        return ceNote.findAll();
    }

    @Override
    public CeNote findOne(Integer id) {
        return ceNote.findOne(id);
    }

    @Override
    public int add(CeNote note) {
        note.setTime(DateHelpler.getDateNow());
        return ceNote.add(note);
    }

    @Override
    public int update(CeNote note) {
        note.setTime(DateHelpler.getDateNow());
        return ceNote.update(note);
    }

    @Override
    public int delete(Integer id) {
        return ceNote.delete(id);
    }
}

WebController层

package com.yms.demo.web;

import com.yms.demo.domain.entity.Result;
import com.yms.demo.domain.pojo.CeNote;
import com.yms.demo.service.CeNoteService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@CrossOrigin//跨域所用
@RestController
public class CeNoteController {

    @Autowired
    private CeNoteService ceNoteService;

    @RequestMapping("/findAll")
    public List<CeNote> findAll() {
        return ceNoteService.findAll();
    }

    @RequestMapping("/findOne")
    public CeNote findOne(Integer id) {
        return ceNoteService.findOne(id);
    }

    @PostMapping("/add")
    public Result add(@RequestBody CeNote note) {

        try {
            ceNoteService.add(note);
            return new Result(true,"成功");
        } catch (Exception e) {
            return new Result(false,"失败");
        }

    }


}