SpringBoot非官方教程 | 第六篇：springboot整合mybatis-白红宇

SpringBoot非官方教程 | 第六篇：springboot整合mybatis

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发布时间：2019-06-13

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本文主要讲解如何在springboot下整合mybatis，并访问数据库。由于mybatis这个框架太过于流行，所以我就不讲解了。

引入依赖

在pom文件引入mybatis-spring-boot-starter的依赖：


    			
     
      org.mybatis.spring.boot
     			
     
      mybatis-spring-boot-starter
      			
       
        1.3.0

引入数据库连接依赖：


    			
     
      mysql
     			
     
      mysql-connector-java
     			
     
      runtime
     		
    		
    			
     
      com.alibaba
     			
     
      druid
     			
     
      1.0.29

引入数据源

application.properties配置文件中引入数据源：

spring.datasource.url=jdbc:mysql://localhost:3306/testspring.datasource.username=rootspring.datasource.password=123456spring.datasource.driver-class-name=com.mysql.jdbc.Driver

这样，springboot就可以访问数据了。

创建数据库表

建表语句：

-- create table `account`# DROP TABLE `account` IF EXISTSCREATE TABLE `account` (  `id` int(11) NOT NULL AUTO_INCREMENT,  `name` varchar(20) NOT NULL,  `money` double DEFAULT NULL,  PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;INSERT INTO `account` VALUES ('1', 'aaa', '1000');INSERT INTO `account` VALUES ('2', 'bbb', '1000');INSERT INTO `account` VALUES ('3', 'ccc', '1000');

具体实现

这篇文篇通过注解的形式实现。

创建实体：

public class Account {   private int id ;   private String name ;   private double money;    setter... getter...}

dao层

@Mapperpublic interface AccountMapper {    @Insert("insert into account(name, money) values(#{name}, #{money})")    int add(@Param("name") String name, @Param("money") double money);    @Update("update account set name = #{name}, money = #{money} where id = #{id}")    int update(@Param("name") String name, @Param("money") double money, @Param("id") int  id);    @Delete("delete from account where id = #{id}")    int delete(int id);    @Select("select id, name as name, money as money from account where id = #{id}")    Account findAccount(@Param("id") int id);    @Select("select id, name as name, money as money from account")    List
    
      findAccountList();}

service层

@Servicepublic class AccountService {    @Autowired    private AccountMapper accountMapper;    public int add(String name, double money) {        return accountMapper.add(name, money);    }    public int update(String name, double money, int id) {        return accountMapper.update(name, money, id);    }    public int delete(int id) {        return accountMapper.delete(id);    }    public Account findAccount(int id) {        return accountMapper.findAccount(id);    }    public List
    
      findAccountList() {        return accountMapper.findAccountList();    }}

controller层，构建restful API

package com.forezp.web;import com.forezp.entity.Account;import com.forezp.service.AccountService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.*;import java.util.List;/** * Created by fangzhipeng on 2017/4/20. */@RestController@RequestMapping("/account")public class AccountController {    @Autowired    AccountService accountService;    @RequestMapping(value = "/list", method = RequestMethod.GET)    public List
    
      getAccounts() {        return accountService.findAccountList();    }    @RequestMapping(value = "/{id}", method = RequestMethod.GET)    public Account getAccountById(@PathVariable("id") int id) {        return accountService.findAccount(id);    }    @RequestMapping(value = "/{id}", method = RequestMethod.PUT)    public String updateAccount(@PathVariable("id") int id, @RequestParam(value = "name", required = true) String name,                                @RequestParam(value = "money", required = true) double money) {        int t= accountService.update(name,money,id);        if(t==1) {            return "success";        }else {            return "fail";        }    }    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)    public String delete(@PathVariable(value = "id")int id) {        int t= accountService.delete(id);        if(t==1) {            return "success";        }else {            return "fail";        }    }    @RequestMapping(value = "", method = RequestMethod.POST)    public String postAccount(@RequestParam(value = "name") String name,                              @RequestParam(value = "money") double money) {       int t= accountService.add(name,money);       if(t==1) {           return "success";       }else {           return "fail";       }    }}

通过postman测试通过。

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