SpringBootå¿«éæ´åMybatisãMybatisPlus(代ç çæå¨)å®ç°æ°æ®åºè®¿é®
1. å建SpringBoot项ç®
![](https://img.laitimes.com/img/_0nNw4CM6IyYiwiM6ICdiwiIyVGduV2YfNWawNCM38FdsYkRGZkRG9lcvx2bjxiNx8VZ6l2cs0TPR5UNrRlT10kaNBDOsJGcohVYsR2MMBjVtJWd0ckW65UbM5WOHJWa5kHT20ESjBjUIF2X0hXZ0xCMx81dvRWYoNHLrdEZwZ1Rh5WNXp1bwNjW1ZUba9VZwlHdssmch1mclRXY39CXldWYtlWPzNXZj9mcw1ycz9WL49zZuBnL2UzMzIDNzMjMwEDNwEjMwIzLc52YucWbp5GZzNmLn9Gbi1yZtl2Lc9CX6MHc0RHaiojIsJye.png)
1.1 å¼å ¥ä¾èµ
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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.3.RELEASE</version>
</parent>
<groupId>com.gcl</groupId>
<artifactId>vue_day03_admin</artifactId>
<version>1.0-SNAPSHOT</version>
<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>
<!--spring-web-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--mybatis-plus-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.2.0</version>
</dependency>
<!--mybatis-plus代ç çæå¨-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-generator</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
</dependency>
<!--mysql驱å¨-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.46</version>
</dependency>
<!--æ°æ®åºè¿æ¥æ± -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.21</version>
</dependency>
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!--æµè¯-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--lang3å·¥å
·ç±»-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.10</version>
</dependency>
</dependencies>
<!-- mavenæ件ï¼å¯ä»¥å°åºç¨æå
æä¸ä¸ªå¯æ§è¡çjarå
ï¼-->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
1.2 ç¼åé ç½®æ件
application.yml
server:
port: 8088
spring:
datasource:
driver-class-name: com.mysql.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource
url: jdbc:mysql://192.168.0.131:3306/vue_day03?useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC
username: root
password: [email protected]
mybatis-plus:
type-aliases-package: com.gcl.entity
configuration:
map-underscore-to-camel-case: true
use-generated-keys: true
log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
mapper-locations: classpath:com/gcl/mapper/*Mapper.xml
logging:
level:
com.demo.mapper: debug
2. ç¼åMybatisPlus代ç çæå·¥å ·ç±»
2.1 ç¼å代ç çæå·¥å ·ç±»
CodeGenerator.java
package com.gcl.utils;
import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.converts.MySqlTypeConvert;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.IColumnType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;
import org.apache.commons.lang3.StringUtils;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
// æ§è¡ main æ¹æ³æ§å¶å°è¾å
¥æ¨¡å表åå车èªå¨çæ对åºé¡¹ç®ç®å½ä¸
public class CodeGenerator {
/**
* <p>
* 读åæ§å¶å°å
容
* </p>
*/
public static String scanner(String tip) {
Scanner scanner = new Scanner(System.in);
StringBuilder help = new StringBuilder();
help.append("请è¾å
¥" + tip + "ï¼");
System.out.println(help.toString());
if (scanner.hasNext()) {
String ipt = scanner.next();
if (StringUtils.isNotEmpty(ipt)) {
return ipt;
}
}
throw new MybatisPlusException("请è¾å
¥æ£ç¡®ç" + tip + "ï¼");
}
public static void main(String[] args) {
// 代ç çæå¨
AutoGenerator mpg = new AutoGenerator();
// å
¨å±é
ç½®
GlobalConfig gc = new GlobalConfig();
String projectPath = System.getProperty("user.dir");
gc.setOutputDir(projectPath + "/vue_day03_admin/src/main/java");
gc.setAuthor("gcl");
// æ¯å¦æå¼è¾åºç®å½ï¼é»è®¤true
gc.setOpen(false);
// å¼å¯ ActiveRecord 模å¼ï¼é»è®¤false
gc.setActiveRecord(true);
// æ¯å¦è¦çå·²ææ件
gc.setFileOverride(true);
// XML å¼å¯ BaseResultMap
gc.setBaseResultMap(true);
// XML å¼å¯ baseColumnList
gc.setBaseColumnList(true);
// èªå®ä¹æ件å½åï¼æ³¨æ %s ä¼èªå¨å¡«å
表å®ä½å±æ§ï¼
// gc.setMapperName("%sDao");
// gc.setXmlName("%sMapper");
gc.setServiceName("%sService");
// gc.setServiceImplName("%sServiceDiy");
// gc.setControllerName("%sAction");
mpg.setGlobalConfig(gc);
// æ°æ®æºé
ç½®
DataSourceConfig dsc = new DataSourceConfig();
dsc.setDbType(DbType.MYSQL);
dsc.setUrl("jdbc:mysql://192.168.0.131:3306/vue_day03?useUnicode=true&useSSL=false&characterEncoding=utf8");
dsc.setDriverName("com.mysql.jdbc.Driver");
dsc.setUsername("root");
dsc.setPassword("[email protected]");
dsc.setTypeConvert(new MySqlTypeConvert(){
// èªå®ä¹æ°æ®åºè¡¨å段类å转æ¢ãå¯éã
@Override
public IColumnType processTypeConvert(GlobalConfig globalConfig, String fieldType) {
System.out.println("转æ¢ç±»åï¼" + fieldType);
// 注æï¼ï¼processTypeConvert åå¨é»è®¤ç±»å转æ¢ï¼å¦æä¸æ¯ä½ è¦çææ请èªå®ä¹è¿åãéå¦ä¸ç´æ¥è¿åã
return super.processTypeConvert(globalConfig, fieldType);
}
});
mpg.setDataSource(dsc);
// å
é
ç½®
PackageConfig pc = new PackageConfig();
// com.demo.user
pc.setParent("com");
// pc.setModuleName("user");
pc.setModuleName(scanner("模åå"));
mpg.setPackageInfo(pc);
// èªå®ä¹é
ç½®
InjectionConfig cfg = new InjectionConfig() {
@Override
public void initMap() {
// TODO
}
};
mpg.setCfg(cfg);
// å¦æ模æ¿å¼ææ¯ freemarker
String templatePath = "/templates/mapper.xml.ftl";
// èªå®ä¹è¾åºé
ç½®
List<FileOutConfig> focList = new ArrayList<>();
// èªå®ä¹é
ç½®ä¼è¢«ä¼å
è¾åº
focList.add(new FileOutConfig(templatePath) {
@Override
public String outputFile(TableInfo tableInfo) {
// èªå®ä¹è¾åºæ件å ï¼ å¦æä½ Entity 设置äºååç¼ãæ¤å¤æ³¨æ xml çå称ä¼è·çåçååï¼ï¼
return projectPath + "/vue_day03_admin/src/main/resources/com/gcl/mapper"
+ "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
}
});
cfg.setFileOutConfigList(focList);
mpg.setCfg(cfg);
// é
置模æ¿
TemplateConfig templateConfig = new TemplateConfig();
templateConfig.setXml(null);
mpg.setTemplate(templateConfig);
// çç¥é
ç½®
StrategyConfig strategy = new StrategyConfig();
strategy.setEntityLombokModel(true);
strategy.setRestControllerStyle(true);
// æ¤å¤å¯ä»¥ä¿®æ¹ä¸ºæ¨ç表åç¼
strategy.setTablePrefix(new String[] { "tb_", "tsys_","t_" });
// 表åçæçç¥
strategy.setNaming(NamingStrategy.underline_to_camel);
// éè¦çæç表
strategy.setInclude(scanner("表åï¼å¤ä¸ªè±æéå·åå²").split(","));
// strategy.setInclude(new String[] { "tb_user" });
strategy.setEntityBuilderModel(true);
mpg.setStrategy(strategy);
mpg.setTemplateEngine(new FreemarkerTemplateEngine());
mpg.execute();
}
}
2.2 å建æ°æ®åºå表
å表è¯å¥
CREATE TABLE `t_user` (
`id` int(60) NOT NULL AUTO_INCREMENT COMMENT '主é®',
`username` varchar(255) DEFAULT NULL COMMENT 'å§å',
`salary` double(7,2) DEFAULT NULL COMMENT 'èªæ°´',
`age` int(11) DEFAULT NULL,
`desc` varchar(255) DEFAULT NULL COMMENT 'æè¿°',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
2.3 æµè¯ä»£ç çæå¨
æ§è¡CodeGeneratorç±»ä¸çmainæ¹æ³
æ§è¡ä»£ç çæå¨ä¹åçç»æ
3. æ·»å å页é ç½®
MyBatisPlusConfig.java
package com.gcl.config;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* @ClassName MyBatisPlusConfig
* @Description TODO
* @Author gcl
* @Date 2021-03-18 8:36
**/
@Configuration
public class MyBatisPlusConfig {
/**
* mybatis-plus å页æ件
*/
@Bean
public PaginationInterceptor paginationInterceptor() {
PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
return paginationInterceptor;
}
}
4. æµè¯è®¿é®æ¥å£ä»æ°æ®åºä¸è·åæ°æ®(带å页)
4.1 æ°æ®åºä¸æ·»å 5æ¡æ°æ®
INSERT INTO `vue_day03`.`t_user` (`id`, `username`, `salary`, `age`, `desc`) VALUES ('1', 'å¼ ä¸', '2000.00', '23', '95å¹´05æç');
INSERT INTO `vue_day03`.`t_user` (`id`, `username`, `salary`, `age`, `desc`) VALUES ('2', 'æå', '3000.00', '24', '96å¹´06å¹´ç');
INSERT INTO `vue_day03`.`t_user` (`id`, `username`, `salary`, `age`, `desc`) VALUES ('3', 'çäº', '4000.00', '25', '07å¹´07å¹´ç');
INSERT INTO `vue_day03`.`t_user` (`id`, `username`, `salary`, `age`, `desc`) VALUES ('4', 'èµµå
', '5000.00', '26', '08å¹´08æç');
INSERT INTO `vue_day03`.`t_user` (`id`, `username`, `salary`, `age`, `desc`) VALUES ('5', 'ç°ä¸', '6000.00', '27', '09å¹´09æç');
4.2 ç¼åæ¥è¯¢æ¹æ³
package com.gcl.controller;
import com.baomidou.mybatisplus.core.conditions.query.Query;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.gcl.entity.User;
import com.gcl.service.UserService;
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;
import java.util.List;
/**
* <p>
* å端æ§å¶å¨
* </p>
*
* @author gcl
* @since 2021-04-10
*/
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
/**
*
* @param pageNo å½å页
* @param pageSize æ¯é¡µæ¾ç¤ºçè®°å½æ°
* @return
*/
@GetMapping
public List<User> findList(int pageNo,int pageSize){
//å建æ¥è¯¢æ¡ä»¶å°è£
å¨
QueryWrapper<User> wrapper = new QueryWrapper<>();
Page<User> page = new Page<>(pageNo, pageSize);
IPage<User> iPage = userService.page(page, wrapper);
List<User> records = iPage.getRecords();
return records;
}
}
4.3 ç¨postmanå·¥å ·æµè¯å页
å æµè¯ç¬¬ä¸é¡µæ¯é¡µæ¾ç¤º3æ¡è®°å½
æ¥ç第äºé¡µçæ°æ®