springboot+mybatisPlus ---分页查询

1 准备配置阶段

1、数据库的表信息

CREATE TABLE `STUDENT1`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `local` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `sex` char(1) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `status` int(20) NULL DEFAULT 1,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1025 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

2、pom依赖

        
            com.baomidou
            mybatis-plus-boot-starter
            3.5.0
        

        
        
            org.webjars
            jquery
            3.5.1
        

        
            org.springframework.boot
            spring-boot-starter-thymeleaf
        
        
            org.springframework.boot
            spring-boot-starter-web
        

        
            com.mysql
            mysql-connector-j
            runtime
        
        
            org.projectlombok
            lombok
            true
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    

3、application.propertis文件

# 配置数据库源连接
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/db2?useSSL=true&useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=****


#mybatis日志
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl

mybatis-plus.global-config.db-config.logic-delete-value=0
mybatis-plus.global-config.db-config.logic-not-delete-value=1

# 开发阶段关闭thymeleaf的模板缓存
spring.thymeleaf.cache=false

3、mybatis-plus5.3.0的分页配置

@Configuration
public class Myconfig {

    //mybatisPlus 分页配置
    @Bean
    public PaginationInnerInterceptor paginationInnerInterceptor() {
        return new PaginationInnerInterceptor();
    }
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor(){
        MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor ();
        mybatisPlusInterceptor.setInterceptors (Collections.singletonList (paginationInnerInterceptor ()));
        return mybatisPlusInterceptor;
    }
}

2、后端

1、 pojo

 2、mapper

@Mapper
public interface StudentMapper extends BaseMapper {

}

3、service

public interface StudentService extends IService {

}

@Service
public class StudentServiceImpl  extends ServiceImpl implements StudentService{
}

 4、controller

@Controller
public class StudentController {

    @Resource
    private StudentServiceImpl service;

    @Resource
    private StudentMapper studentMapper;

    @RequestMapping("/show")
    public String show(Model model,
                       @RequestParam(required = true, defaultValue = "1") Integer pageNum,
                       @RequestParam(required = true, defaultValue = "3") Integer pageSize) {

        Page page = new Page<>(pageNum, pageSize);
//        Page pages = studentMapper.selectPage(page, null);
        Page pages = service.page(page, null);
        model.addAttribute("pages", pages);
        return "show";
    }

    @RequestMapping("/show1")
    public String show1(Model model,
                       @RequestParam(required = true, defaultValue = "1") Integer pageNum,
                       @RequestParam(required = true, defaultValue = "3") Integer pageSize,
                       String likename) {

        Page page = new Page<>(pageNum, pageSize);
        QueryWrapper queryWrapper = new QueryWrapper<>();
        queryWrapper.like("name",likename);
//        Page pages = studentMapper.selectPage(page, queryWrapper);
        Page pages = service.page(page, queryWrapper);
        model.addAttribute("pages", pages);
        model.addAttribute("likename",likename);
        return "show";
    }




    @RequestMapping("/toAddStudent")
    public String toAddStudent() {
        return "addUser";
    }

    @RequestMapping("/addStudent")
    public String addUser(Student1 student1) {
        studentMapper.insert(student1);
        return "redirect:show";
    }

    @RequestMapping("/toUpdate")
    public String toUpdate(int id,
                           Model model) {
        Student1 student1 = studentMapper.selectById(id);
        model.addAttribute("list", student1);
        return "update";
    }

    @RequestMapping("/update")
    public String update(Student1 student1) {
        studentMapper.updateById(student1);
        return "redirect:show";
    }

    @RequestMapping("/deleteUserByIds")
    public String deleteUserByIds(String ids) {
        ArrayList list = new ArrayList<>();
        String[] split = ids.split("-");
        for (String s : split) {
            list.add(Integer.parseInt(s));
        }
        studentMapper.deleteBatchIds(list);

        return "redirect:/show";
    }


    @GetMapping("deleteById")
    public String deleteById(int id) {
        studentMapper.deleteById(id);
        return "redirect:/show";
    }


}

3、前端展示

1、show.html

    
    

    

    



    

        

            

                学生列表信息页面
            
            

                
                
                
            

            新增
            

            

                

                

                    

                        反选
                    
                    
学号
                    
学生信息
                    
所在学院
                    
性别
                    
操作
                
                
                

                

                    

                        
                    
                    

                    

                    

                    


                    

                    

                    
                
                

                
            
            
            

            


            

                
                
                    
                
                
                    
                
                

            
        
    

2、addStudent.html

    姓名:

    岗位:

    性别:

    

3、update.html

    
    姓名:

    岗位:

    性别: