摘要：歷史文章如何在安裝最新版安裝安裝最新版教程內容備注本系列開發工具均為構建項目，選擇四個基本的依賴。層與其實現，這個比較簡單，一般做過項目的都了解層，我這邊構建了一個方法，通過獲取信息。

本博客 貓叔的博客，轉載請申明出處
本系列教程為HMStrange項目附帶。

如何在VMware12安裝Centos7.6最新版

Centos7.6安裝Java8

Centos7.6安裝MySQL+Redis（最新版）

備注：本系列開發工具均為IDEA

大家可以看看pom文件

    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        2.1.4.RELEASE
         
    
    com.myself.mybatis
    datademo
    0.0.1-SNAPSHOT
    datademo
    Demo project for Spring Boot

    
        1.8
    

    
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            2.0.1
        

        
            mysql
            mysql-connector-java
            runtime
        
        
            org.projectlombok
            lombok
            true
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

DDL

CREATE TABLE `t_msg` (
  `id` int(11) NOT NULL,
  `message` varchar(255) DEFAULT NULL COMMENT "信息",
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

spring:
  datasource:
    url: jdbc:mysql://192.168.192.133:3306/datademo?characterEncoding=utf-8&useSSL=false
    username: root
    password: password
    driver-class-name: com.mysql.cj.jdbc.Driver
mybatis:
  mapper-locations: classpath*:mapper/*Mapper.xml
  type-aliases-package: com.myself.mybatis.entity

package com.myself.mybatis.entity;

import lombok.Data;

import java.io.Serializable;

/**
 * Created by MySelf on 2019/4/9.
 */
@Data
public class TMsg implements Serializable {

    private Integer id;

    private String message;

}

package com.myself.mybatis.mapper;

import com.myself.mybatis.entity.TMsg;
import org.apache.ibatis.annotations.Mapper;

/**
 * Created by MySelf on 2019/4/9.
 */
@Mapper
public interface TMsgMapper {

    public TMsg findById(Integer id);

}

    
        SELECT id,message from t_msg WHERE id = #{id}
    

我這邊就單純一個方法，大家可以擴展自己的方法。

package com.myself.mybatis.service;

import com.myself.mybatis.entity.TMsg;

/**
 * Created by MySelf on 2019/4/9.
 */
public interface TMsgService {

    public TMsg findById(Integer id);

}

package com.myself.mybatis.service.impl;

import com.myself.mybatis.entity.TMsg;
import com.myself.mybatis.mapper.TMsgMapper;
import com.myself.mybatis.service.TMsgService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * Created by MySelf on 2019/4/9.
 */
@Service
public class TMsgServiceImpl implements TMsgService {

    @Autowired
    private TMsgMapper tMsgMapper;

    @Override
    public TMsg findById(Integer id) {
        return tMsgMapper.findById(id);
    }
}

package com.myself.mybatis.controller;

import com.myself.mybatis.entity.TMsg;
import com.myself.mybatis.service.TMsgService;
import org.apache.ibatis.annotations.Param;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by MySelf on 2019/4/9.
 */
@RestController
@RequestMapping("/msg")
public class TMsgController {

    @Autowired
    private TMsgService tMsgService;

    @GetMapping("/getMsg")
    public String getMsg(@Param("id") Integer id){
        TMsg tMsg = tMsgService.findById(id);
        return tMsg.getMessage();
    }

}

歡迎到HMStrange項目進行下載：https://github.com/UncleCatMy...

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