Springboot 整合 MyBatis(一):跑起来

时间 2019-12-04

标签 springboot 整合 mybatis 起来栏目 Spring 繁體版

原文原文链接

0x1 环境java

　　1. 系统:Windows 10 mysql

　　2. IDE:IntelliJ IDEA 2018.3 x64git

0x2 建立项目github

　　1.建立一个SpringBoot项目web

　　　　选择Spring Initailizr >Nextspring

　　　　简单配置便可>Nextsql

　　　　选择项目所需依赖>Next数据库

　　　　选择项目工做空间[随便写]:目录不存在会自动建立 > Next springboot

　　　　建立好后,idea就会加载依赖包,并弹出提示,Meven项目须要导入依赖,选择自动导包mybatis

　　　　等待一会....当右下角没有进度条就说明好了

　　2. 建立项目结构

　　　　这三个文件能够删除

　　　　依次建立目录:controller层,domain层(entity),mapper层,query层,service层,建立好就是这样子......

注意:本文不使用application.properties文件而使用更加简洁的application.yml文件,可能大家已经注意到了项目中有四个 yml文件这是为何?

　　由于如今一个项目有好多环境，开发环境，测试环境，准生产环境，生产环境，每一个环境的参数不一样，因此咱们就能够把每一个环境的参数配置到 yml文件中

　　在Spring Boot中多环境配置文件名须要知足application-{profile}.yml的格式，其中{profile}对应你的环境标识，好比：

　　　　application.yml：主文件
　　　　application-dev.yml：开发环境
　　　　application-test.yml：测试环境
　　　　application-prod.yml：生产环境

　　须要加载那个文件就在在 application.yml 文件中经过spring.profiles.active属性来设置，其值对应{profile}值。好比

　　建立数据库表

CREATE TABLE `user` (
  `id` BIGINT(32) NOT NULL AUTO_INCREMENT,
  `userName` varchar(32) NOT NULL,
  `passWord` varchar(50) NOT NULL,
  `realName` varchar(32) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

　　3. 完善结构

①User.java　　　　　

 1 package xyz.bit1024.sunny.domain;
 2 
 3 /**
 4  * @ClassName User
 5  * @Date 2019-06-15 16:14
 6  * @Author xiaozhi
 7  * @Version 1.0.0
 8  * @Since JDK 1.8
 9  * @Description 实体类
10  */
11 public class User {
12     private Long id;
13     private String userName;
14     private String passWord;
15     private String realName;
16 
17     public Long getId() {
18         return id;
19     }
20 
21     public void setId(Long id) {
22         this.id = id;
23     }
24 
25     public String getUserName() {
26         return userName;
27     }
28 
29     public void setUserName(String userName) {
30         this.userName = userName;
31     }
32 
33     public String getPassWord() {
34         return passWord;
35     }
36 
37     public void setPassWord(String passWord) {
38         this.passWord = passWord;
39     }
40 
41     public String getRealName() {
42         return realName;
43     }
44 
45     public void setRealName(String realName) {
46         this.realName = realName;
47     }
48 
49     @Override
50     public String toString() {
51         return "User{" +
52                 "id=" + id +
53                 ", userName='" + userName + '\'' +
54                 ", passWord='" + passWord + '\'' +
55                 ", realName='" + realName + '\'' +
56                 '}';
57     }
58 }

笔者按:在实体类中覆写toString方法有助于查错---<阿里巴巴Java开发手册>

UserMapper.java

 1 package xyz.bit1024.sunny.mapper;
 2 
 3 import xyz.bit1024.sunny.domain.User;
 4 
 5 import java.util.List;
 6 
 7 /**
 8  * @ClassName UserMapper
 9  * @Date 2019-06-15 16:21
10  * @Author xiaozhi
11  * @Version 1.0.0
12  * @Since JDK 1.8
13  * @Description
14  */
15 public interface UserMapper {
16     List<User> listAll();
17 }

UserQuery.java 查询对象　　　

 1 package xyz.bit1024.sunny.query;
 2 
 3 /**
 4  * @ClassName UserQuery
 5  * @Date 2019-06-15 16:28
 6  * @Author xiaozhi
 7  * @Version 1.0.0
 8  * @Since JDK 1.8
 9  * @Description
10  */
11 public class UserQuery {
12 }

IUserService.java:接口层,面向接口思想　　

 1 package xyz.bit1024.sunny.service;
 2 
 3 import xyz.bit1024.sunny.domain.User;
 4 
 5 import java.util.List;
 6 
 7 /**
 8  * @ClassName IUserService
 9  * @Date 2019-06-15 16:17
10  * @Author xiaozhi
11  * @Version 1.0.0
12  * @Since JDK 1.8
13  * @Description
14  */
15 public interface IUserService {
16 
17     /**
18      * 所有用户
19      * @return List<User>
20      */
21     List<User> listAll();
22 }

在service 层下建立 impl 目录,并在impl目录下面建立 IUserService 实现类并实现覆写父类方法

UserServiceImpl.java

 1 package xyz.bit1024.sunny.service.impl;
 2 
 3 import org.springframework.beans.factory.annotation.Autowired;
 4 import org.springframework.stereotype.Service;
 5 import xyz.bit1024.sunny.domain.User;
 6 import xyz.bit1024.sunny.mapper.UserMapper;
 7 import xyz.bit1024.sunny.service.IUserService;
 8 
 9 import java.util.List;
10 
11 /**
12  * @ClassName UserServiceImpl
13  * @Date 2019-06-15 16:19
14  * @Author xiaozhi
15  * @Version 1.0.0
16  * @Since JDK 1.8
17  * @Description 实现类[业务类]
18  */
19 @Service
20 public class UserServiceImpl implements IUserService {
21 
22     @Autowired
23     private UserMapper userMapper;
24 
25     @Override
26     public List<User> listAll() {
27         return userMapper.listAll();
28     }
29 }

⑥ 在resources 建立mapper目录,并建立 UserMapper.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 3 <mapper namespace="xyz.bit1024.sunny.mapper.UserMapper">
 4     <resultMap id="BaseResultMap" type="xyz.bit1024.sunny.domain.User">
 5         <result column="id" jdbcType="BIGINT" property="id" />
 6         <result column="userName" jdbcType="VARCHAR" property="userName" />
 7         <result column="passWord" jdbcType="VARCHAR" property="passWord" />
 8         <result column="realName" jdbcType="VARCHAR" property="realName" />
 9     </resultMap>
10 
11     <sql id="Base_Column_List">
12         id, userName, passWord, realName
13     </sql>
14     <sql id="Base_Column_List_Value">
15         #{id,jdbcType=Long},
16         #{userName,jdbcType=VARCHAR},
17         #{passWord,jdbcType=VARCHAR},
18         #{realName,jdbcType=VARCHAR}
19     </sql>
20     <select id="listAll" resultMap="BaseResultMap">
21         select <include refid="Base_Column_List"/> from t_user
22     </select>
23 </mapper>

UserController.java

 1 package xyz.bit1024.sunny.controller;
 2 
 3 import org.springframework.beans.factory.annotation.Autowired;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 import org.springframework.web.bind.annotation.RestController;
 6 import xyz.bit1024.sunny.domain.User;
 7 import xyz.bit1024.sunny.service.IUserService;
 8 
 9 import java.util.List;
10 
11 /**
12  * @ClassName UserController
13  * @Date 2019-06-15 16:16
14  * @Author xiaozhi
15  * @Version 1.0.0
16  * @Since JDK 1.8
17  * @Description
18  */
19 @RestController
20 @RequestMapping("/user")
21 public class UserController {
22 
23     //注入Service对象
24     @Autowired
25     private IUserService iUserService;
26 
27     @RequestMapping("/listAll")
28     public List<User> listAll(){
29         return iUserService.listAll();
30     }
31 }

　　4 .完善配置

　　　　① 配置Mapper扫描包

　　　　application-dev.yml

　　　　logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <property name="LOG_HOME" value="./logs" />
    <property name="APP_NAME" value="bit1024" />
    <include resource="org/springframework/boot/logging/logback/defaults.xml" />
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{35} - %msg %n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>
    <appender name="infoFile" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME}/${APP_NAME}.info.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
            <maxFileSize>10MB</maxFileSize>
            <maxHistory>30</maxHistory>
            <totalSizeCap>6GB</totalSizeCap>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>
    <appender name="warnFile" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>WARN</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME}/${APP_NAME}.warn.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
            <maxFileSize>10MB</maxFileSize>
            <maxHistory>30</maxHistory>
            <totalSizeCap>6GB</totalSizeCap>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>
    <appender name="errorFile" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${LOG_HOME}/${APP_NAME}.error.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
            <maxFileSize>10MB</maxFileSize>
            <maxHistory>30</maxHistory>
            <totalSizeCap>6GB</totalSizeCap>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>
    
    <!--myibatis日志配置--> 
    <logger name="xyz.bit1024.sunny.mapper" level="INFO"/>
    <logger name="xyz.bit1024" level="DEBUG"/>

    <!-- 日志输出级别 -->
    <root level="INFO">
        <appender-ref ref="CONSOLE"></appender-ref>
        <appender-ref ref="infoFile"></appender-ref>
        <appender-ref ref="warnFile"></appender-ref>
        <appender-ref ref="errorFile"></appender-ref>
    </root>
</configuration>

　　构造测试数据

INSERT INTO `springboot`.`t_user` (`id`, `userName`, `passWord`, `realName`) VALUES ('10000001', 'admin', 'admin', '超级管理员');
INSERT INTO `springboot`.`t_user` (`id`, `userName`, `passWord`, `realName`) VALUES ('10000002', 'user1', '123', '用户1');
INSERT INTO `springboot`.`t_user` (`id`, `userName`, `passWord`, `realName`) VALUES ('10000003', 'user2', '123', '用户2');

　　一切完毕只待测试

　　　使用PostMan测试一波

　　成功,,完美

采坑:

　　java.sql.SQLException: The server time zone value '�й��׼ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.

修改配置文件:

url: jdbc:mysql://localhost:3306/springboot?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC


此次的集成就算完了,,有空把登陆+shiro也集成

以前也没用过 GitHub :https://gist.github.com/bit1024-404/38f42bef407a7609e324eb00147ec5c1