如何在SpringBoot中使用MybatisPlus？相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。
springboot一种全新的编程规范，其设计目的是用来简化新Spring应用的初始搭建以及开发过程，SpringBoot也是一个服务于框架的框架，服务范围是简化配置文件。
项目目录结构：
pom文件：
<?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.warrior</groupId> <artifactId>ETH</artifactId> <version>1.0-SNAPSHOT</version> <!-- Inherit defaults from Spring Boot --> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.0.BUILD-SNAPSHOT</version> </parent> <!-- Add typical dependencies for a web application --> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- mybatis的orm插件 --> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatisplus-spring-boot-starter</artifactId> <version>1.0.4</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus</artifactId> <version>2.0.7</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.velocity/velocity --> <dependency> <groupId>org.apache.velocity</groupId> <artifactId>velocity</artifactId> <version>1.7</version> </dependency> <!-- https://mvnrepository.com/artifact/org.freemarker/freemarker --> <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>2.3.28</version> </dependency> <!--数据库连接jdbc依赖--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <!--mysql链接依赖--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <!--阿里druid数据库链接依赖--> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.9</version> </dependency> <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>0.10.1</version> <scope>provided</scope> </dependency> </dependencies> <!-- Package as an executable jar --> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> <!-- Add Spring repositories --> <!-- (you don't need this if you are using a .RELEASE version) --> <repositories> <repository> <id>spring-snapshots</id> <url>http://repo.spring.io/snapshot</url> <snapshots> <enabled>true</enabled> </snapshots> </repository> <repository> <id>spring-milestones</id> <url>http://repo.spring.io/milestone</url> </repository> </repositories> <pluginRepositories> <pluginRepository> <id>spring-snapshots</id> <url>http://repo.spring.io/snapshot</url> </pluginRepository> <pluginRepository> <id>spring-milestones</id> <url>http://repo.spring.io/milestone</url> </pluginRepository> </pluginRepositories> </project>
Application
package com.warrior;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@SpringBootApplication
@MapperScan("com.warrior.mapper") //配置mapper扫描
public class Application {
public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class, args);
}
}application.properties
#默认启用开发环境配置 spring.profiles.active=dev #启用生产环境配置 #spring.profiles.active=pro
application-dev.properties
server.port=8080 spring.datasource.type=com.alibaba.druid.pool.DruidDataSource spring.datasource.url=jdbc:mysql://localhost:3306/eth spring.datasource.username=root spring.datasource.password=123456 spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.max-idle=10 spring.datasource.max-wait=10000 spring.datasource.min-idle=5 spring.datasource.initial-size=5 mybatis-plus.mapper-locations=classpath:/mapper/*Mapper.xml mybatis-plus.typeAliasesPackage=com.cn.restyle.entity
配置文件：
1）.
package com.warrior.config;
import javax.sql.DataSource;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import com.alibaba.druid.pool.DruidDataSource;
/**
* 数据源配置
*/
@Configuration
public class DataSourceConfig {
@Bean(name="dataSource")
@ConfigurationProperties(prefix="spring.datasource")
public DataSource dataSource(){
return new DruidDataSource();
}
// 配置事物管理器
@Bean(name="transactionManager")
public DataSourceTransactionManager transactionManager(){
return new DataSourceTransactionManager(dataSource());
}
}2）. MybatisPlusConfig.java:
package com.warrior.config;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.baomidou.mybatisplus.plugins.PaginationInterceptor;
@Configuration
//扫描dao或者是Mapper接口
@MapperScan("com.warrior.mapper*")
public class MybatisPlusConfig {
/**
* mybatis-plus 分页插件
*/
@Bean
public PaginationInterceptor paginationInterceptor(){
PaginationInterceptor page = new PaginationInterceptor();
page.setDialectType("mysql");
return page;
}
}生成代码：
1）.mysql数据库建表
2）.代码生成器MpGenenator.java
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
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.DbColumnType;
import com.baomidou.mybatisplus.generator.config.rules.DbType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
/**
* <p>
* 代码生成器演示
* </p>
*/
public class MpGenerator {
final static String dirPath = "D://";
/**
* <p>
* MySQL 生成演示
* </p>
*/
public static void main(String[] args) {
AutoGenerator mpg = new AutoGenerator();
// 选择 freemarker 引擎，默认 Veloctiy
//mpg.setTemplateEngine(new FreemarkerTemplateEngine());
// 全局配置
GlobalConfig gc = new GlobalConfig();
gc.setOutputDir(dirPath);
gc.setAuthor("lqh");
gc.setFileOverride(true); //是否覆盖
gc.setActiveRecord(true);// 不需要ActiveRecord特性的请改为false
gc.setEnableCache(false);// XML 二级缓存
gc.setBaseResultMap(true);// XML ResultMap
gc.setBaseColumnList(true);// XML columList
// 自定义文件命名，注意 %s 会自动填充表实体属性！
// gc.setMapperName("%sDao");
// gc.setXmlName("%sMapper");
// gc.setServiceName("MP%sService");
// gc.setServiceImplName("%sServiceDiy");
// gc.setControllerName("%sAction");
mpg.setGlobalConfig(gc);
// 数据源配置
DataSourceConfig dsc = new DataSourceConfig();
dsc.setDbType(DbType.MYSQL);
dsc.setTypeConvert(new MySqlTypeConvert(){
// 自定义数据库表字段类型转换【可选】
@Override
public DbColumnType processTypeConvert(String fieldType) {
System.out.println("转换类型：" + fieldType);
// 注意！！processTypeConvert 存在默认类型转换，如果不是你要的效果请自定义返回、非如下直接返回。
return super.processTypeConvert(fieldType);
}
});
dsc.setDriverName("com.mysql.jdbc.Driver");
dsc.setUsername("root");
dsc.setPassword("123456");
dsc.setUrl("jdbc:mysql://127.0.0.1:3306/eth?characterEncoding=utf8");
mpg.setDataSource(dsc);
// 策略配置
StrategyConfig strategy = new StrategyConfig();
// strategy.setCapitalMode(true);// 全局大写命名 ORACLE 注意
strategy.setTablePrefix(new String[] { "tb_", "tsys_" });// 此处可以修改为您的表前缀
strategy.setNaming(NamingStrategy.underline_to_camel);// 表名生成策略
// strategy.setInclude(new String[] { "user" }); // 需要生成的表
// strategy.setExclude(new String[]{"test"}); // 排除生成的表
// 自定义实体父类
// strategy.setSuperEntityClass("com.baomidou.demo.TestEntity");
// 自定义实体，公共字段
// strategy.setSuperEntityColumns(new String[] { "test_id", "age" });
// 自定义 mapper 父类
// strategy.setSuperMapperClass("com.baomidou.demo.TestMapper");
// 自定义 service 父类
// strategy.setSuperServiceClass("com.baomidou.demo.TestService");
// 自定义 service 实现类父类
// strategy.setSuperServiceImplClass("com.baomidou.demo.TestServiceImpl");
// 自定义 controller 父类
// strategy.setSuperControllerClass("com.baomidou.demo.TestController");
// 【实体】是否生成字段常量（默认 false）
// public static final String ID = "test_id";
// strategy.setEntityColumnConstant(true);
// 【实体】是否为构建者模型（默认 false）
// public User setName(String name) {this.name = name; return this;}
strategy.setEntityBuilderModel(true);
mpg.setStrategy(strategy);
// 包配置
PackageConfig pc = new PackageConfig();
pc.setParent("com");
pc.setModuleName("warrior");
pc.setController("controler");
pc.setEntity("entity");
pc.setMapper("mapper");
pc.setService("service");
pc.setServiceImpl("serviceImpl");
pc.setXml("mapperXml");
mpg.setPackageInfo(pc);
// 注入自定义配置，可以在 VM 中使用 cfg.abc 【可无】
InjectionConfig cfg = new InjectionConfig() {
@Override
public void initMap() {
Map<String, Object> map = new HashMap<String, Object>();
map.put("abc", this.getConfig().getGlobalConfig().getAuthor() + "-mp");
this.setMap(map);
}
};
// 自定义 xxList.jsp 生成
List<FileOutConfig> focList = new ArrayList<FileOutConfig>();
/* focList.add(new FileOutConfig("/template/list.jsp.vm") {
@Override
public String outputFile(TableInfo tableInfo) {
// 自定义输入文件名称
return "D://my_" + tableInfo.getEntityName() + ".jsp";
}
});
cfg.setFileOutConfigList(focList);
mpg.setCfg(cfg);*/
// 调整 xml 生成目录演示
/* focList.add(new FileOutConfig("/templates/mapper.xml.vm") {
@Override
public String outputFile(TableInfo tableInfo) {
return dirPath + tableInfo.getEntityName() + "Mapper.xml";
}
});
cfg.setFileOutConfigList(focList);
*/
mpg.setCfg(cfg);
// 关闭默认 xml 生成，调整生成 至 根目录
/* TemplateConfig tc = new TemplateConfig();
tc.setXml(null);
mpg.setTemplate(tc);*/
// 自定义模板配置，可以 copy 源码 mybatis-plus/src/main/resources/templates 下面内容修改，
// 放置自己项目的 src/main/resources/templates 目录下, 默认名称一下可以不配置，也可以自定义模板名称
// TemplateConfig tc = new TemplateConfig();
// tc.setController("...");
// tc.setEntity("...");
// tc.setMapper("...");
// tc.setXml("...");
// tc.setService("...");
// tc.setServiceImpl("...");
// 如上任何一个模块如果设置 空 OR Null 将不生成该模块。
// mpg.setTemplate(tc);
// 执行生成
mpg.execute();
// 打印注入设置【可无】
System.err.println(mpg.getCfg().getMap().get("abc"));
}
}生成的文件如下,只要将对应文件拷到项目对应包即可：
下面把对应类展示出来：
.entity-->Student.java
package com.warrior.entity;
import com.baomidou.mybatisplus.enums.IdType;
import com.baomidou.mybatisplus.annotations.TableId;
import com.baomidou.mybatisplus.annotations.TableField;
import com.baomidou.mybatisplus.activerecord.Model;
import com.baomidou.mybatisplus.annotations.TableName;
import java.io.Serializable;
/**
* <p>
*
* </p>
*
* @author lqh
* @since 2018-05-25
*/
@TableName("tb_student")
public class Student extends Model<Student> {
private static final long serialVersionUID = 1L;
@TableId(value="id", type= IdType.AUTO)
private Integer id;
@TableField("stu_name")
private String stuName;
@TableField("stu_number")
private String stuNumber;
private Integer age;
public Integer getId() {
return id;
}
public Student setId(Integer id) {
this.id = id;
return this;
}
public String getStuName() {
return stuName;
}
public Student setStuName(String stuName) {
this.stuName = stuName;
return this;
}
public String getStuNumber() {
return stuNumber;
}
public Student setStuNumber(String stuNumber) {
this.stuNumber = stuNumber;
return this;
}
public Integer getAge() {
return age;
}
public Student setAge(Integer age) {
this.age = age;
return this;
}
@Override
protected Serializable pkVal() {
return this.id;
}
}.mapper-->StudentMapper.java
package com.warrior.mapper;
import com.warrior.entity.Student;
import com.baomidou.mybatisplus.mapper.BaseMapper;
/**
* <p>
* Mapper 接口
* </p>
*
* @author lqh
* @since 2018-05-25
*/
public interface StudentMapper extends BaseMapper<Student> {
}mapperXml-->StudentMapper.xml(这个文件要放到src/main/resources/mapper)
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.warrior.mapper.StudentMapper"> <!-- 通用查询映射结果 --> <resultMap id="BaseResultMap" type="com.warrior.entity.Student"> <id column="id" property="id" /> <result column="stu_name" property="stuName" /> <result column="stu_number" property="stuNumber" /> <result column="age" property="age" /> </resultMap> <!-- 通用查询结果列 --> <sql id="Base_Column_List"> id, stu_name AS stuName, stu_number AS stuNumber, age </sql> </mapper>
.service-->IStudentService.java
package com.warrior.service;
import com.warrior.entity.Student;
import com.baomidou.mybatisplus.service.IService;
/**
* <p>
* 服务类
* </p>
*
* @author lqh
* @since 2018-05-25
*/
public interface IStudentService extends IService<Student> {
}.serviceImpl-->StudentServiceImpl.java
package com.warrior.serviceImpl;
import com.warrior.entity.Student;
import com.warrior.mapper.StudentMapper;
import com.warrior.service.IStudentService;
import com.baomidou.mybatisplus.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;
/**
* <p>
* 服务实现类
* </p>
*
* @author lqh
* @since 2018-05-25
*/
@Service
public class StudentServiceImpl extends ServiceImpl<StudentMapper, Student> implements IStudentService {
}.controler-->StudentController.java
package com.warrior.controler;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* <p>
* 前端控制器
* </p>
*
* @author lqh
* @since 2018-05-25
*/
@Controller
@RequestMapping("/warrior/student")
public class StudentController {
}经过以上六步项目已经搭建完成，下面就是写业务代码了，只需要实现controller即可，下面对StudentController.java进行修改：
package com.warrior.controler;
import com.warrior.entity.Student;
import com.warrior.service.IStudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
/**
* <p>
* 前端控制器
* </p>
*
* @author lqh
* @since 2018-05-05
*/
@Controller
@RequestMapping("/warrior/student")
public class StudentController {
@Autowired
IStudentService iStudentService;
@RequestMapping("/hello")
@ResponseBody
public String hello() {
//insert
Student student = new Student()
.setStuName("zhangsan")
.setStuNumber("54")
.setAge(23);
boolean res = iStudentService.insert(student);
return res ? "success" : "fail";
}
}看完上述内容，你们掌握如何在SpringBoot中使用MybatisPlus的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注亿速云行业资讯频道，感谢各位的阅读！
免责声明：本站发布的内容（图片、视频和文字）以原创、转载和分享为主，文章观点不代表本网站立场，如果涉及侵权请联系站长邮箱：is@yisu.com进行举报，并提供相关证据，一经查实，将立刻删除涉嫌侵权内容。
