SpringBoot整合MybatisPlus
2021-12-24 本文已影响0人
WebGiser
1、项目结构
image.png
2、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 https://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>2.3.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.geovis</groupId>
<artifactId>mybatis_plus</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>mybatis_plus</name>
<description>mybatis_plus</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<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>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.4.0</version>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-generator</artifactId>
<version>3.4.0</version>
</dependency>
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-engine-core</artifactId>
<version>2.3</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
3、application.properties
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://192.168.1.11:3306/mybatis_plus?useSSL=false&characterEncoding=UTF8&serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=123456
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
4、CodeGenerator.java：MybatisPlus代码生成器
package com.geovis.mybatis_plus.code;
import com.baomidou.mybatisplus.annotation.DbType;
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.DateType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
// MybatisPlus代码生成器
public class CodeGenerator {
public static void main(String[] args) {
// 代码生成器
AutoGenerator mpg = new AutoGenerator();
// 全局配置
GlobalConfig gc = new GlobalConfig();
// 文件生成的目录
String projectPath = System.getProperty("user.dir");
gc.setOutputDir(projectPath + "/src/main/java");
gc.setAuthor("wzf");
gc.setOpen(false);
// 是否覆盖旧文件
gc.setFileOverride(false);
gc.setSwagger2(true);
// 去service的 I 前缀
gc.setServiceName("%sService");
gc.setDateType(DateType.ONLY_DATE);
mpg.setGlobalConfig(gc);
// 数据源配置
DataSourceConfig dsc = new DataSourceConfig();
dsc.setDriverName("com.mysql.cj.jdbc.Driver");
dsc.setUrl("jdbc:mysql://192.168.1.11:3306/mybatis_plus?useSSL=false&characterEncoding=UTF8&serverTimezone=GMT%2B8");
// dsc.setSchemaName("public");
dsc.setUsername("root");
dsc.setPassword("123456");
dsc.setDbType(DbType.MYSQL);
mpg.setDataSource(dsc);
// 包的配置
PackageConfig pc = new PackageConfig();
pc.setModuleName("test");
pc.setParent("com.geovis.mybatis_plus");
pc.setEntity("pojo");
pc.setMapper("mapper");
pc.setService("service");
pc.setController("controller");
mpg.setPackageInfo(pc);
// 策略配置
StrategyConfig strategyConfig = new StrategyConfig();
// 要映射的表名
strategyConfig.setInclude("user");
strategyConfig.setNaming(NamingStrategy.underline_to_camel);
strategyConfig.setColumnNaming(NamingStrategy.underline_to_camel);
strategyConfig.setEntityLombokModel(true);
strategyConfig.setRestControllerStyle(true);
strategyConfig.setControllerMappingHyphenStyle(true); // localhost/hello_id_2
mpg.setStrategy(strategyConfig);
mpg.execute();
}
}
5、MybatisPlusConfig.java：MybatisPlus配置
package com.geovis.mybatis_plus.config;
import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@MapperScan("com.geovis.mybatis_plus.mapper")
public class MybatisPlusConfig {
// 设置分页插件
@Bean
public MybatisPlusInterceptor mybatisPlusInterceptor() {
MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
return interceptor;
}
}
6、MyMetaObjectHandler.java
package com.geovis.mybatis_plus.handler;
import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;
import java.util.Date;
// MybatisPlus元对象处理：字段自动赋值
@Slf4j
@Component
public class MyMetaObjectHandler implements MetaObjectHandler {
// 在插入和更新的时候，默认给对象的字段赋值
@Override
public void insertFill(MetaObject metaObject) {
log.info("start insert fill...");
// this.setFieldValByName("createTime", new Date(), metaObject);
// this.setFieldValByName("updateTime", new Date(), metaObject);
this.strictInsertFill(metaObject, "createTime", Date.class, new Date());
this.strictInsertFill(metaObject, "updateTime", Date.class, new Date());
}
@Override
public void updateFill(MetaObject metaObject) {
log.info("start update fill...");
// this.setFieldValByName("updateTime", new Date(), metaObject);
this.strictUpdateFill(metaObject, "updateTime", Date.class, new Date());
}
}
7、mapper/UserMapper.java
package com.geovis.mybatis_plus.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.geovis.mybatis_plus.pojo.User;
import org.springframework.stereotype.Repository;
@Repository
public interface UserMapper extends BaseMapper<User> {
}
8、pojo/User.java
package com.geovis.mybatis_plus.pojo;
import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.util.Date;
@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
public class User {
private int id;
private String name;
private int age;
private String email;
@TableField(fill = FieldFill.INSERT)
private Date createTime;
@TableField(fill = FieldFill.INSERT_UPDATE)
private Date updateTime;
}
9、MybatisPlusApplicationTests.java：测试crud
package com.geovis.mybatis_plus;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.geovis.mybatis_plus.mapper.UserMapper;
import com.geovis.mybatis_plus.pojo.User;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import java.lang.reflect.Array;
import java.util.*;
@SpringBootTest
class MybatisPlusApplicationTests {
@Autowired
private UserMapper userMapper;
@Test
void selectUser() {
List<User> list = userMapper.selectList(null);
list.forEach(System.out::println);
}
// 查询数据测试
@Test
void selectUserById() {
User user = userMapper.selectById(1);
System.out.println(user);
List<User> userList = userMapper.selectBatchIds(Arrays.asList(1, 2, 3));
userList.forEach(System.out::println);
}
// 多条件查询数据测试: map
@Test
void selectUserByMap() {
Map map = new HashMap();
map.put("name", "aaa");
List<User> userList = userMapper.selectByMap(map);
userList.forEach(System.out::println);
}
// 多条件查询数据测试: wrapper(非常重要)
@Test
void wrapperUser() {
QueryWrapper<User> wrapper = new QueryWrapper<>();
wrapper.between("age", 20, 25)
.like("email", "@")
.orderByDesc("id");
List<User> userList = userMapper.selectList(wrapper);
userList.forEach(System.out::println);
}
// 分页查询
@Test
void selectUserByPage() {
Page<User> page = new Page<>(1, 3);
userMapper.selectPage(page, null);
System.out.println(page.getTotal());
page.getRecords().forEach(System.out::println);
}
// 插入数据测试
@Test
void insertUser() {
User user = User.builder()
.id(500)
.name("aaa")
.age(10)
.email("123@qq.com")
.build();
int result = userMapper.insert(user);
System.out.println(result);
System.out.println(user);
}
// 更新数据测试
@Test
void updateUser() {
User user = User.builder()
.id(50)
.name("ccc")
.build();
int result = userMapper.updateById(user);
System.out.println(result);
System.out.println(user);
}
// 删除数据测试
@Test
void deleteUser() {
int result = userMapper.deleteById(0);
// userMapper.deleteBatchIds(Arrays.asList(1, 2));
System.out.println(result);
}
// 删除数据测试
@Test
void deleteUserMap() {
Map map = new HashMap();
map.put("name", "aaa");
int result = userMapper.deleteByMap(map);
System.out.println(result);
}
}
