Springboot+mysql+mybatisplus

本文是介绍基于mysql数据库实现的springboot项目

1.引入jar包

       
            org.springframework.boot
            spring-boot-starter
            
                
                    org.apache.logging.log4j
                    log4j-api
                
                
                    org.apache.logging.log4j
                    log4j-core
                
            
        
        
            org.apache.logging.log4j
            log4j-api
            2.17.0
        
        
            org.apache.logging.log4j
            log4j-core
            2.17.0
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.projectlombok
            lombok
            true
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
         
        
            mysql
            mysql-connector-java
            runtime
        
        
        
            com.baomidou
            mybatis-plus-boot-starter
            3.2.0
        
        
            com.baomidou
            mybatis-plus-generator
            3.2.0
        

2.添加application.properties文件

server.port=8090
logging.file.name=logs/test.log

# mysql
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC&allowPublicKeyRetrieval=true
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
#mybatis-plus
mybatis-plus.configuration.auto-mapping-behavior=full
mybatis-plus.configuration.map-underscore-to-camel-case=true
mybatis-plus.configuration.call-setters-on-nulls=true
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
mybatis-plus.mapper-locations=com.demo.dao.mapper.*Mapper.xml

3.添加config文件

package com.demo.configs;

import com.baomidou.mybatisplus.extension.plugins.OptimisticLockerInterceptor;
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;

/**
 * MybatisPlusConfig
 *
 * @Description
 */
@Configuration
@EnableTransactionManagement
@MapperScan("com.demo.dao.mapper")
public class MybatisPlusConfig {

    /**
     * 配置乐观锁插件
     * @return
     */
    @Bean
    public OptimisticLockerInterceptor optimisticLockerInterceptor() {
        return new OptimisticLockerInterceptor();
    }

    /**
     * 分页插件
     * @return
     */
    @Bean
    public PaginationInterceptor paginationInterceptor(){
        return new PaginationInterceptor();
    }



}

4.entity层

package com.demo.entity;

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

/**
 * SearchRecordEntity
 *
 * @Description
 */
@Data
@TableName("t_search_record")
public class SearchRecordEntity{
    /**
     * 主键ID
     */
    @TableId(type = IdType.AUTO)
    private Integer id;

    /**
     * 名称
     */
    private String name;
 
    /**
     * 备注
     */
    private String remark;

}

5.dao层

package com.demo.dao;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.demo.entity.SearchRecordEntity;
import org.springframework.stereotype.Repository;

/**
 * SearchRecordDao
 *
 * @Description
 */
@Repository
public interface SearchRecordMapper extends BaseMapper {

}

6.mapper层

7.service层

package com.demo.service;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.demo.dao.SearchRecordMapper;
import com.demo.dto.SearchRecordRequest;
import com.demo.entity.SearchRecordEntity;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import java.util.*;

/**
 * SearchRecordService
 *
 * @Description
 */
@Service
@Slf4j
public class SearchRecordService extends ServiceImpl {

    /**
     * 获取搜索记录列表接口
     *
     * @param recordRequest
     * @return
     */
    public IPage findAll(SearchRecordRequest recordRequest) {
        Map result = new HashMap<>();
        List recordEntities = new ArrayList<>();
        IPage page = new Page<>();
        page.setSize(recordRequest.getPageSize());
        page.setCurrent(recordRequest.getPage());
        QueryWrapper queryWrapper = new QueryWrapper<>();

        if (StringUtils.isNotEmpty(recordRequest.getName())) {
            queryWrapper.like("name", recordRequest.getName());
        }
        queryWrapper.orderByDesc("id");
        IPage searchRecords = this.page(page, queryWrapper);
        return searchRecords;
    }


}

8.controller层

package com.demo.controller;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.api.R;
import com.demo.dto.SearchRecordRequest;
import com.demo.entity.SearchRecordEntity;
import com.demo.service.SearchRecordService;

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;

/**
 * SearchRecordController
 *
 * @Description
 */
@Slf4j
@RestController
@RequestMapping(value = "esp/search-record")
public class SearchRecordController {

    @Resource
    private SearchRecordService searchRecordService;

    /**
     * 查询搜索记录列表接口
     *
     * @param recordRequest
     * @return
     */
    @GetMapping("/findAll")
    public R> findAll(SearchRecordRequest recordRequest) {
        try {
            if (recordRequest.getPage() == null || recordRequest.getPageSize() == null) {
                return R.failed("page或pageSize不能为空");
            }
            return R.ok(searchRecordService.findAll(recordRequest));

        } catch (Exception e) {
            log.error("查询搜索记录列表接口异常：{}", e);
            return R.failed("查询搜索记录列表接口异常：" + e.getMessage());
        }
    }

}

9.服务启动类

package com.demo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan(basePackages = "com.demo.dao")
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

10.访问controller层接口验证