SpringBoot整合mybatis-generator-maven-plugin的方法
前言:
SpringBoot版本 : 2.2.6
mybatis-generator-maven-plugin版本: 1.4.0
plugin 使用 mysql版本: 5.1.47
本次主要記錄日和使用該外掛自動生成pojo mapper xml檔案(單表)
1 建立SpringBoot工程
這裡不做具體記錄,建立工程往常教程很多,
下面貼出重要檔案和注意事項
1.1 pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>show.mrkay</groupId> <artifactId>boot-mybatis-generator</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.6.RELEASE</version> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <!--springboot--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> </dependency> <!--mysql--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.9</version> </dependency> <!--mybatis--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.0</version> </dependency> <!--日誌--> <!--因為是基於AOP實現的所以這裡必須要調入aop--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency> <!--門面--> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> </dependency> <!--log4j12--> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </dependency> </dependencies> <build> <!--外掛--> <plugins> <!--springboot的maven外掛--> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.4.0</version> <!--外掛設定--> <configuration> <!--允許移動生成的檔案--> <verbose>true</verbose> <!--啟用覆蓋--> <overwrite>true</overwrite> <!--自動生成配置 如果名字是generatorConfig.xml可以省略配置--> <!--<configurationFile>src/main/resources/generatorConfig.xml</configurationFile>--> </configuration> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> </dependencies> </plugin> </plugins> </build> </project>
1.2 application.yml
server: port: 8080 spring: datasource: driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/generaltor?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT username: root password: lk0313 druid: db-type: com.alibaba.druid.pool.DruidDataSource # 下面不配置就是採用預設配置 # filters: stat # maxActive: 20 # initialSize: 1 # maxWait: 60000 # minIdle: 1 # timeBetweenEvictionRunsMillis: 60000 # minEvictableIdleTimeMillis: 300000 # validationQuery: select 'x' # testWhileIdle: true # testOnBorrow: false # testOnReturn: false # poolPreparedStatements: true # maxOpenPreparedStatements: 20 mybatis: # 該配置項配置了MyBatis配置檔案儲存路徑 mapper-locations: classpath*:show/makey/dao/*.xml # 配置掃描對應實體所在包,將mapper的實現類注入容器我們在啟動器類上加了@MapperScan註解這裡就不需要了 logging: file: path: /logs # type-aliases-package: show.mrkay.dao
1.3 generatorConfig.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <!-- 是否生成註釋代時間戳--> <property name="suppressDate" value="true"/> <!-- 是否去除自動生成的註釋 true:是 : false:否 --> <property name="suppressAllComments" value="true"/> </commentGenerator> <!--資料庫連結地址賬號密碼--> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1:3306/generaltor?serverTimezone=Asia/Shanghai" userId="root" password="lk0313"> </jdbcConnection> <javaTypeResolver> <!--該屬性可以控制是否強制DECIMAL和NUMERIC型別的欄位轉換為Java型別的java.math.BigDecimal,預設值為false,一般不需要配置。--> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!--生成Model類存放位置--> <javaModelGenerator targetPackage="show.mrkay.pojo" targetProject="src/main/java"> <!--enableSubPackages:如果true,MBG會根據catalog和schema來生成子包。如果false就會直接用targetPackage屬性。預設為false。--> <property name="enableSubPackages" value="true"/> <!--trimStrings:是否對資料庫查詢結果進行trim操作,如果設定為true就會生成類似這樣public void setUsername(String username) {this.username = username == null ? null : username.trim();}的setter方法。預設值為false。--> <property name="trimStrings" value="true"/> </javaModelGenerator> <!--生成對映xml檔案存放位置--> <sqlMapGenerator targetPackage="show.mrkay.dao" targetProject="src/main/resources/"> <property name="enableSubPackages" value="true"/> </sqlMapGenerator> <!--生成Dao類存放位置(*Mapper.java)--> <!-- 客戶端程式碼,生成易於使用的針對Model物件和XML配置檔案 的程式碼 type="ANNOTATEDMAPPER",生成Java Model 和基於註解的Mapper物件 type="MIXEDMAPPER",生成基於註解的Java Model 和相應的Mapper物件 type="XMLMAPPER",生成SQLMap XML檔案和獨立的Mapper介面 --> <javaClientGenerator type="XMLMAPPER" targetPackage="show.mrkay.dao" targetProject="src/main/java"> <property name="enableSubPackages" value="true"/> </javaClientGenerator> <!--生成對應表及類名--> <table tableName="student" domainObjectName="Student" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"> <!--useActualColumnNames:如果設定為true,那麼MBG會使用從資料庫元資料獲取的列名作為生成的實體物件的屬性。 如果為false(預設值),MGB將會嘗試將返回的名稱轉換為駝峰形式。 在這兩種情況下,可以通過 元素顯示指定,在這種情況下將會忽略這個(useActualColumnNames)屬性。--> <property name="useActualColumnNames" value="true"/> <!-- 資料庫表主鍵 --> <generatedKey column="id" sqlStatement="Mysql" identity="true" /> </table> </context> </generatorConfiguration>
步驟:
1 匯入依賴
2 建立*generaltorConfig.xml配置檔案
3 配置yml配置檔案
注意:
pom中generalto-maven-plugs中必須指定mysql驅動,並且明確版本
generaltorConfig.xml中的
標籤中需要指定tableName和生成的實體名字
2 建立資料庫表
-- 建表語句: /* SQLyog Enterprise v12.09 (64 bit) MySQL - 5.5.40 : Database - generaltor ********************************************************************* */ /*!40101 SET NAMES utf8 */; /*!40101 SET SQL_MODE=''*/; /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS,UNIQUE_CHECKS=0 */; /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS,FOREIGN_KEY_CHECKS=0 */; /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE,SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */; /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES,SQL_NOTES=0 */; CREATE DATABASE /*!32312 IF NOT EXISTS*/`generaltor` /*!40100 DEFAULT CHARACTER SET utf8 */; /*Table structure for table `student` */ DROP TABLE IF EXISTS `student`; CREATE TABLE `student` ( `id` int(32) NOT NULL AUTO_INCREMENT,`name` varchar(15) DEFAULT NULL,`sex` varchar(2) DEFAULT NULL,`phone` int(15) DEFAULT NULL,PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8; /*Data for the table `student` */ insert into `student`(`id`,`name`,`sex`,`phone`) values (1,'lk','男',12345578); /*!40101 SET SQL_MODE=@OLD_SQL_MODE */; /*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */; /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */; /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
3 執行
如果使用IDEA 我們只需要找到右邊側欄中的maven(沒有記得調出了)
找到plugins–>mybatis-generaltor–>mybatis-generaltor:generaltor 之後雙擊即可,此時重新整理一下專案就自動生成我們想要的,mapper和xml以及pojo
4 測試
建立穿點controller和service 來完成一次測試,
package show.mrkay.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.Mapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.servlet.support.JstlUtils; import show.mrkay.dao.StudentMapper; import show.mrkay.pojo.Student; import show.mrkay.service.UserService; import java.util.List; /** * @ClassName: UserController * @description: 使用者Controller * @Author: MrKay * @Date: 2020/11/8 */ @RestController @RequestMapping("/user") public class UserController { @Autowired private UserService userService; @GetMapping("/alllist") public List<Student> selectAll(){ return userService.selectAll(); } }
package show.mrkay.service; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import show.mrkay.dao.StudentMapper; import show.mrkay.pojo.Student; import java.util.List; /** * @ClassName: UserService * @description: UserService * @Author: MrKay * @Date: 2020/11/8 */ @Service public class UserService { @Autowired private StudentMapper studentMapper; public List<Student> selectAll(){ List<Student> students = studentMapper.selectAll(); return students; } }
package show.mrkay; import org.mybatis.spring.annotation.MapperScan; import org.mybatis.spring.annotation.MapperScans; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication @MapperScan("show.mrkay.dao") public class GeneratorApplication { public static void main(String[] args) { SpringApplication.run(GeneratorApplication.class,args); } }
注意:
啟動器類中需要加入@MapperScan(“mapper介面所在包”)註解,這樣我們就不需要手動建立實現類了,mybatis會自動幫我們建立
啟動之後:
位址列輸入 localhost:8080/user/alllist
得到查詢結果:
[{"id":1,"name":"lk","sex":"男","phone":12345578}]
5 完整程式碼
https://gitee.com/mrkay0313/boot-mybatis-generaltor.git
6 總結
便於自己以後使用,做的一個demo
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