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SpringBoot Service和Dao的編寫詳解

更新時(shí)間：2020年11月23日 09:14:15 作者：瑞新

這篇文章主要介紹了SpringBoot Service和Dao的編寫詳解，文中通過(guò)示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值，需要的朋友們下面隨著小編來(lái)一起學(xué)習(xí)學(xué)習(xí)吧

本文主要介紹了SpringBoot Service和Dao的編寫詳解，分享給大家，具體如下：

效果圖

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配置環(huán)境

創(chuàng)建數(shù)據(jù)庫(kù)

數(shù)據(jù)庫(kù)中文編碼

在這里插入圖片描述

建表

create table `student` (
	`id` int(11) Not NULL AUTO_INCREMENT COMMENT '主鍵自增id',
	`name` varchar(250) NOT NULL DEFAULT ' ' COMMENT '姓名',
	PRIMARY KEY(`id`)
)ENGINE=INNODB DEFAULT CHARSET=utf8;

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pom依賴和配置

mybatis 和 mysql

<!--    connect-->
<!--    不同版本mybatis對(duì)應(yīng)boot版本不同-->
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>2.1.1</version>
    </dependency>
<!--    mysql版本可以不指定-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
    </dependency>

application.properties

# mysql
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/rxguo_test?serverTimezone=UTC&characterEncoding=utf8&useSSL=false
spring.datasource.username=root
spring.datasource.password=

java bean

package com.bennyrhys.com.shop.bean;

public class Student {
  Integer id;
  String name;

  public Integer getId() {
    return id;
  }

  public void setId(Integer id) {
    this.id = id;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  @Override
  public String toString() {
    return "Student{" +
        "id=" + id +
        ", name='" + name + '\'' +
        '}';
  }
}

Controller

package com.bennyrhys.com.shop;

import com.bennyrhys.com.shop.bean.Student;
import com.bennyrhys.com.shop.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class StudentController {
  @Autowired
  StudentService studentService;

  @GetMapping("/student")
  public String getStudentById(@RequestParam Integer id) {
    Student student = studentService.getStudentById(id);
    return student.toString();
  }
}

Service

package com.bennyrhys.com.shop.service;

import com.bennyrhys.com.shop.bean.Student;
import com.bennyrhys.com.shop.mapper.StudentMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class StudentService {

  @Autowired
  StudentMapper studentMapper;

  public Student getStudentById(Integer id) {
    return studentMapper.getStudentById(id);
  }
}

Mapper接口

package com.bennyrhys.com.shop.mapper;

import com.bennyrhys.com.shop.bean.Student;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;


@Mapper
@Repository
public interface StudentMapper {
  @Select("select * from student where id = #{id}")
  Student getStudentById(Integer id);
}

到此這篇關(guān)于SpringBoot Service和Dao的編寫詳解的文章就介紹到這了,更多相關(guān)SpringBoot Service和Dao編寫內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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