Mybatis-Plus(簡稱MP)是一個 Mybatis 的增強工具,在 Mybatis 的基礎上只做增強不做改變,爲簡化開發、提高效率而生。
1. 訪問spring initializr創建自己的springboot應用
路徑爲下:
https://start.spring.io
搜索選擇mybatis的依賴
下載完成後解壓壓縮包,在eclipse導入已存在的maven項目,並且等待下載jar包,直到下載完成後可以正常打開pom.xml。
2. 添加mybatis-plus的maven依賴
<!-- mybatisplus與springboot整合 -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatisplus-spring-boot-starter</artifactId>
<version>1.0.5</version>
</dependency>
<!-- MP 核心庫 -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus</artifactId>
<version>2.1.8</version>
</dependency>
<!-- 模板引擎 -->
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-engine-core</artifactId>
<version>2.0</version>
</dependency>
除此之外還用到了mysql數據庫,阿里巴巴druid數據庫連接池。
完整pom.xml中maven依賴如下
<?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>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</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>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</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>
<scope>test</scope>
</dependency>
<!-- 阿里巴巴druid數據庫連接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.3</version>
</dependency>
<!-- mysql驅動 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!-- mybatisplus與springboot整合 -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatisplus-spring-boot-starter</artifactId>
<version>1.0.5</version>
</dependency>
<!-- MP 核心庫 -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus</artifactId>
<version>2.1.8</version>
</dependency>
<!-- 模板引擎 -->
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-engine-core</artifactId>
<version>2.0</version>
</dependency>
<!-- springboot整合mybatis(核心就這一個) -->
<!-- 注意順序,這個一定要放在最下面 -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
3. 添加mybatis-plus的配置
在src\main\resources創建文件application.yml
# 配置mybatis-plus
mybatis-plus:
# 配置掃描xml
mapper-locations:
- classpath:mapper/*.xml
# 實體掃描,多個package用逗號或者分號分隔**重點內容**
type-aliases-package: com.ahut.entity
global-config:
# 邏輯刪除配置
logic-delete-value: 0
logic-not-delete-value: 1
sql-injector: com.baomidou.mybatisplus.mapper.LogicSqlInjector
4. 創建需要生成的表
在mysql中創建表,sql示例
create table students (
id integer not null primary key,
name varchar(255) not null,
age integer not null,
version integer not null);
insert into students values(1,'ALLEN',30, 5);
insert into students values(2,'WARD',32, 2);
insert into students values(3,'JONES',38, 4);
insert into students values(4,'TOM',4, 6);
insert into students values(5,'JACK',2, 1);
insert into students values(6,'THOMAS',10, 3);
5. 使用mybatisplus,添加代碼生成類GenerationCode.java
package com.example.demo.code;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.rules.DbType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
/**
*
* @ClassName: GenerationCode
* @Description: 代碼生成類
*/
public class GenerationCode {
/**
*
* @Title: main
* @Description: 生成
* @param args
*/
public static void main(String[] args) {
AutoGenerator mpg = new AutoGenerator();
// 全局配置
GlobalConfig gc = new GlobalConfig();
gc.setOutputDir("E://code"); // 代碼生成路徑
gc.setFileOverride(true); // 新生成文件是否覆蓋
gc.setActiveRecord(false);// 不需要ActiveRecord特性的請改爲false
gc.setEnableCache(false);// XML 二級緩存
gc.setBaseResultMap(true);// XML ResultMap
gc.setBaseColumnList(false);// XML columList
gc.setAuthor("yuleMeng");// 作者
// 自定義文件命名,注意 %s 會自動填充表實體屬性!
gc.setControllerName("%sAction");
gc.setServiceName("%sService");
gc.setServiceImplName("%sServiceImpl");
gc.setMapperName("%sMapper");
gc.setXmlName("%sMapper");
mpg.setGlobalConfig(gc);
// 數據源配置
DataSourceConfig dsc = new DataSourceConfig();
dsc.setDbType(DbType.MYSQL); //數據源類型
dsc.setDriverName("com.mysql.jdbc.Driver"); //數據路驅動類
dsc.setUsername("root"); //數據庫用戶名
dsc.setPassword("root"); //數據庫密碼
dsc.setUrl("jdbc:mysql://127.0.0.1:3306/test"); //數據庫url
mpg.setDataSource(dsc);
// 策略配置
StrategyConfig strategy = new StrategyConfig();
strategy.setTablePrefix(new String[] { "" });// 此處可以修改爲您的表前綴
strategy.setNaming(NamingStrategy.underline_to_camel);// 表名生成策略
strategy.setInclude(new String[] { "employee" }); // 需要生成的表
strategy.setSuperServiceClass(null);
strategy.setSuperServiceImplClass(null);
strategy.setSuperMapperClass(null);
mpg.setStrategy(strategy);
// 包配置
PackageConfig pc = new PackageConfig();
pc.setParent("com.example.demo");
pc.setController("action");
pc.setService("service");
pc.setServiceImpl("serviceImpl");
pc.setMapper("mapper");
pc.setEntity("entity");
pc.setXml("xml");
mpg.setPackageInfo(pc);
// 執行生成
mpg.execute();
}
}
運行改類,就可以根據數據庫表結構生成對應的action,service,serviceImpl,mapper,entity,xml,controller…
此文章只記錄了簡單的配置方式,僅作爲個人學習和練習用。