Spring boot + mybatis + spring

PearSakura. 2020-11-06 01:15:52
spring boot mybatis spring

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First create the required database , You also need to create the required forms , Then on application.properties To configure


Achieve one pojo object

brand Never encapsulate the information returned from the database .

package com.cy.pj.brand.pojo;
import java.util.Date;
public class Brand {
private Integer id;
private String name;
private String logo;
private String remark;
private Date createdTime;
public Integer getId() {
return id;
public void setId(Integer id) {
this.id = id;
public String getName() {
return name;
public void setName(String name) {
this.name = name;
public String getLogo() {
return logo;
public void setLogo(String logo) {
this.logo = logo;
public String getRemark() {
return remark;
public void setRemark(String remark) {
this.remark = remark;
public Date getCreatedTime() {
return createdTime;
public void setCreatedTime(Date createdTime) {
this.createdTime = createdTime;
public String toString() {
return "Brand{" +
"id=" + id +
", name='" + name + ''' +
", logo='" + logo + ''' +
", remark='" + remark + ''' +
", createdTime=" + createdTime +

Create data logical objects (DAO)

Designed to access Brand Data access objects and methods of data
Define a (BrandDao)

package com.cy.pj.brand.dao;
import com.cy.pj.brand.pojo.Brand;
import org.apache.ibatis.annotations.Mapper;
import java.util.List;
public interface BrandDao {
//@Select("select * from tb_brand where name like concat('%',#{name},'%')")
List<Brand> findBrands(String name);

@Mapper Annotation is to create impl The right to spring Framework management ,impl You can extract data from the database and return it to

Business logic objects (Service)

The business logic object is responsible for the specific business processing of the module , For example, parameter verification , Transaction control , Access control , Logging, etc .
Create an interface

package com.cy.pj.brand.service;
import com.cy.pj.brand.pojo.Brand;
import java.util.List;
public interface BrandService {
List<Brand> findBrands(String name);

Implementation interface

package com.cy.pj.brand.service.impl;
import com.cy.pj.brand.dao.BrandDao;
import com.cy.pj.brand.pojo.Brand;
import com.cy.pj.brand.service.BrandService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
public class BrandServiceImpl implements BrandService {
private static final Logger log= LoggerFactory.getLogger(BrandServiceImpl.class);
private BrandDao brandDao;
public List<Brand> findBrands(String name) {
long t1 = System.currentTimeMillis();
List<Brand> list = brandDao.findBrands(name);
long t2 = System.currentTimeMillis();
log.info("time:{}", t2 - t1);
return list;

Control logic objects (Controller)

In the control logic object, it is mainly responsible for the request and response logic control , Such as request url mapping , Parameter mapping , Request mode , Encapsulation of result sets , analysis , Response design, etc .

package com.cy.pj.brand.controller;
import com.cy.pj.brand.pojo.Brand;
import com.cy.pj.brand.service.BrandService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import java.util.List;
public class BrandController {
private BrandService brandService;
//http://localhost/brand/doFindBrands?name=tcl The traditional way
//http://localhost/brand/doFindBrands?name=tcl rest style , Better cross platform
public String doFindBrands(@PathVariable(required = false) String name, Model model){
List<Brand> list=brandService.findBrands(name);
return "brand/brand";

Client page design

<tr th:each="brand: ${list}">
<td th:text="${brand.id}">10</td>
<td th:text="${brand.name}">AAA</td>
<td th:text="${#dates.format(brand.createdTime, 'yyyy/MM/dd

among :
1)${} by thymeleaf For medium EL expression , Used from the server side model Get data in
2)th:each by thymeleaf Defined custom label properties , For iterative data .
3)th:text by thymeleaf Defined custom label properties , Used to set text content .

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