前後端部落格專案搭建(1) 資料庫Mybatis-plus與spring-boot整合
阿新 • • 發佈：2021-08-28
前後端部落格專案搭建(1) 資料庫Mybatis-plus與spring-boot整合
建立資料庫表
CREATE TABLE `m_user` ( id BIGINT(20) NOT NULL AUTO_INCREMENT, username VARCHAR(64) DEFAULT NULL, avatar VARCHAR(255) DEFAULT NULL, email VARCHAR(64) DEFAULT NULL, `password` VARCHAR(64) DEFAULT NULL, `status` INT(5) NOT NULL, `created` DATETIME DEFAULT NULL, PRIMARY KEY (`id`), KEY `uk_userName` (`username`) USING BTREE ) ENGINE=INNODB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8; CREATE TABLE m_blog( id BIGINT(20) NOT NULL AUTO_INCREMENT, user_id BIGINT(20) NOT NULL, title VARCHAR(255) NOT NULL, description VARCHAR(255) NOT NULL, content LONGTEXT, `created` DATETIME NOT NULL, PRIMARY KEY(`id`) )ENGINE=INNODB AUTO_INCREMENT=11 DEFAULT CHARSET=utf8mb4;
建立springboot專案 整合mybatis-plus
建立springboot專案同時匯入下面這些jar包
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency>
devtools：專案的熱載入重啟外掛
lombok：簡化程式碼的工具
整合mp
匯入依賴
<!--mp--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.2.0</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-freemarker</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <!--mp程式碼生成器--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-generator</artifactId> <version>3.2.0</version> </dependency>
編寫配置檔案
# DataSource Config
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/vueblog?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8
username: root
password: 123456
mybatis-plus:
mapper-locations: classpath*:/mapper/**Mapper.xml
開啟mapper介面掃描，新增分頁外掛
package com.jie.config;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableTransactionManagement
@MapperScan("com.jie.mapper")
public class MybatisPlusConfig {
@Bean
public PaginationInterceptor paginationInterceptor() {
PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
return paginationInterceptor;
}
}
使用程式碼生成器
package com.jie;
import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
// 演示例子，執行 main 方法控制檯輸入模組表名回車自動生成對應專案目錄中
public class CodeGenerate {
/**
* <p>
* 讀取控制檯內容
* </p>
*/
public static String scanner(String tip) {
Scanner scanner = new Scanner(System.in);
StringBuilder help = new StringBuilder();
help.append("請輸入" + tip + "：");
System.out.println(help.toString());
if (scanner.hasNext()) {
String ipt = scanner.next();
if (StringUtils.isNotEmpty(ipt)) {
return ipt;
}
}
throw new MybatisPlusException("請輸入正確的" + tip + "！");
}
public static void main(String[] args) {
// 程式碼生成器
AutoGenerator mpg = new AutoGenerator();
// 全域性配置
GlobalConfig gc = new GlobalConfig();
String projectPath = System.getProperty("user.dir");
gc.setOutputDir(projectPath + "/src/main/java");
// gc.setOutputDir("D:\\test");
gc.setAuthor("jie");
gc.setOpen(false);
// gc.setSwagger2(true); 實體屬性 Swagger2 註解
gc.setServiceName("%sService");
mpg.setGlobalConfig(gc);
// 資料來源配置
DataSourceConfig dsc = new DataSourceConfig();
dsc.setUrl("jdbc:mysql://localhost:3306/vueblog?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8");
// dsc.setSchemaName("public");
dsc.setDriverName("com.mysql.cj.jdbc.Driver");
dsc.setUsername("root");
dsc.setPassword("123456");
mpg.setDataSource(dsc);
// 包配置
PackageConfig pc = new PackageConfig();
pc.setModuleName(null);
pc.setParent("com.jie");
mpg.setPackageInfo(pc);
// 自定義配置
InjectionConfig cfg = new InjectionConfig() {
@Override
public void initMap() {
// to do nothing
}
};
// 如果模板引擎是 freemarker
String templatePath = "/templates/mapper.xml.ftl";
// 如果模板引擎是 velocity
// String templatePath = "/templates/mapper.xml.vm";
// 自定義輸出配置
List<FileOutConfig> focList = new ArrayList<>();
// 自定義配置會被優先輸出
focList.add(new FileOutConfig(templatePath) {
@Override
public String outputFile(TableInfo tableInfo) {
// 自定義輸出檔名 ， 如果你 Entity 設定了前後綴、此處注意 xml 的名稱會跟著發生變化！！
return projectPath + "/src/main/resources/mapper/"
+ "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
}
});
cfg.setFileOutConfigList(focList);
mpg.setCfg(cfg);
// 配置模板
TemplateConfig templateConfig = new TemplateConfig();
templateConfig.setXml(null);
mpg.setTemplate(templateConfig);
// 策略配置
StrategyConfig strategy = new StrategyConfig();
strategy.setNaming(NamingStrategy.underline_to_camel);
strategy.setColumnNaming(NamingStrategy.underline_to_camel);
strategy.setEntityLombokModel(true);
strategy.setRestControllerStyle(true);
strategy.setInclude(scanner("表名，多個英文逗號分割").split(","));
strategy.setControllerMappingHyphenStyle(true);
strategy.setTablePrefix("m_");
mpg.setStrategy(strategy);
mpg.setTemplateEngine(new FreemarkerTemplateEngine());
mpg.execute();
}
}
輸入m_user,m_blog來生成對應的程式碼
表中新增一個數據
控制類中我們寫一個方法測試能否獲得資料
package com.jie.controller;
import com.jie.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* <p>
* 前端控制器
* </p>
*
* @author jie
* @since 2021-08-28
*/
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
UserService userService;
@GetMapping("/{id}")
public Object test(@PathVariable("id") Long id) {
return userService.getById(id);
}
}
訪問http://localhost:8080/user/1
發現成功獲得資料