SpringBoot 2.SpringBoot整合Mybatis,springbootmybatis

SpringBoot 2.SpringBoot整合Mybatis,springbootmybatis

一、创建Springboot的配置文件:application.properties,并添加MyBatis依赖

图片 1

SpringApplication 会从 application.properties 文件中加载配置信息,下面是添加Spring配置信息的文件目录顺序:

  1. 当前目录下的/config子目录中
  2. 当前目录中
  3. 一个 classpath 包下的 /config 目录中
  4. classpath 根目录中

 大家根据自己习惯来即可。

(1)application.properties 文件配置如下:

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1/test
spring.datasource.username=root
spring.datasource.password=root

(2)添加 MyBatis 以及 MYSQL

        <!-- SpringBoot - MyBatis -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.2.0</version>
        </dependency>
        <!-- Mysql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

 

二、创建POJO、Mapper、Service 以及 Controler

(1)User.java

package org.rcddup.app.domain;

public class User {
    private Long id;
    private String name;
    private Short age;
    private Short status;

    public Long getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public Short getAge() {
        return age;
    }

    public void setAge(Short age) {
        this.age = age;
    }

    public Short getStatus() {
        return status;
    }

    public void setStatus(Short status) {
        this.status = status;
    }

}

(2)UserMapper.java

package org.rcddup.app.dao;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.rcddup.app.domain.User;

@Mapper
public interface UserMapper {

    @Select("select id, name, age, status from user")
    List<User> listUser();

    @Select("select id, name, age, status from user where id=#{id}")
    User getUserById(Long id);

}

(3)IUserService.java

package org.rcddup.app.service;

import java.util.List;

import org.rcddup.app.domain.User;

public interface IUserService {

    List<User> listUser();

    User getUserById(Long id);

}

(4)UserService.java

package org.rcddup.app.service.impl;

import java.util.List;

import org.rcddup.app.dao.UserMapper;
import org.rcddup.app.domain.User;
import org.rcddup.app.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService implements IUserService{

    @Autowired
    private UserMapper userMapper;

    @Override
    public List<User> listUser() {
        return userMapper.listUser();
    }

    @Override
    public User getUserById(Long id) {
        return userMapper.getUserById(id);
    }

}

(5)UserController.java

package org.rcddup.app.web.controller;

import java.util.List;

import org.rcddup.app.domain.User;
import org.rcddup.app.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private IUserService userService;

    @RequestMapping("/list")
    public List<User> list() {
        return userService.listUser();
    }

    @RequestMapping("/get")
    public User list(Long id) {
        return userService.getUserById(id);
    }

}

  

  重新启动 App.java

  输入:

图片 2

  输入:

图片 3

  到此,SpringBoot整合Mybatis就成功了。

    因为本人比较懒,就不配置Mapper.xml了,直接使用Mybatis的注解@Select 配置查询语句。后续会讲到Mybatis逆向工程,懒人(不是本人O(∩_∩)O)所造之物,非常赞,哈哈哈!!!

 

2.SpringBoot整合Mybatis,springbootmybatis 一、创建Springboot的配置文件:application.properties,并添加MyBatis依赖 SpringApplication 会从 applicatio...

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