mybatisplus iservice接口(iphone 8 plus怎么样)

大家好，又见面了，我是你们的朋友全栈君。

新建实体类

package com.example.pojo;

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;

@Data
@TableName(value = "user")
public class User {
    @TableId(value = "id",type = IdType.AUTO)//主键自增
    private Integer id;
    @TableField(value = "name")
    private String name;
    @TableField(value = "pwd")
    private String pwd;
}

新建Mapper接口继承BaseMapper

package com.example.mapper;


import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.pojo.User;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface UserMapper extends BaseMapper<User> {
}

编写Service接口继承IService

package com.example.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.example.pojo.User;


public interface UserService  extends IService<User> {
}

编写UserviceImpl实现类，继承ServiceImpl并实现UserService

package com.example.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.mapper.UserMapper;
import com.example.pojo.User;
import com.example.service.UserService;
import org.springframework.stereotype.Service;


@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
}

测试类（这里仅测试单个插入和批量插入）：

package com.example;

import com.example.mapper.UserMapper;
import com.example.pojo.User;
import com.example.service.UserService;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;


import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;


@RunWith(SpringRunner.class)
@SpringBootTest
class MybatisgreneratorApplicationTests {

	@Autowired
	private UserService userService;
    

    //测试批量插入
	@Test
	public void testServiceSaveBatch(){
		List<User> userList = new ArrayList<>();
		User user = new User();
		user.setName("xiaohua");
		user.setPwd("123456");

		User user1 = new User();
		user1.setName("xiaoming");
		user1.setPwd("123456");
		userList.add(user);
		userList = Arrays.asList(user,user1);
		System.out.println(userService.saveBatch(userList));

	}

    //单个实体插入
	@Test
	public void testServiceSave(){
		User user = new User();
		user.setName("李娜娜");
		user.setPwd("123456");
		System.out.println(userService.save(user));

	}


}

配置文件连接数据库

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=root

pom文件的编写

<?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>
		<artifactId>mybatisplus</artifactId>
		<groupId>com.example</groupId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>
	<groupId>com.example</groupId>
	<artifactId>mybatisgrenerator</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>mybatisgrenerator</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>1.8</java.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
		</dependency>


		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
		</dependency>

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>

		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-boot-starter</artifactId>
			<version>3.4.2</version>
		</dependency>


		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-generator</artifactId>
			<version>3.4.1</version>
		</dependency>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<scope>test</scope>
		</dependency>


	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>