第187天学习打卡（项目 谷粒商城29 品牌分类与级联更新 ）

Posted 2021-08-12 doudoutj

品牌分类关联与级联更新

重新弄回分类的原始数据

gulimall.product.config

MyBatisConfig.java

这个分页插件使用失败

package com.doudou.gulimall.product.config;


import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration//配置类
@EnableTransactionManagement//开启事务
@MapperScan("com.doudou.gulimall.product.dao")
public class MyBatisConfig {
    /**
     * 分页插件
     */
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
        // 设置请求的页面大于最大页后操作， true调回到首页，false 继续请求  默认false
        paginationInterceptor.setOverflow(true);
        // 设置最大单页限制数量，默认 500 条，-1 不受限制
        paginationInterceptor.setLimit(1000);
        // 开启 count 的 join 优化,只针对部分 left join
        paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));
        return paginationInterceptor;
    }

}

出现的错误

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    com.baomidou.mybatisplus.autoconfigure.IdentifierGeneratorAutoConfiguration$InetUtilsAutoConfig.identifierGenerator(IdentifierGeneratorAutoConfiguration.java:59)

The following method did not exist:

    com.baomidou.mybatisplus.core.incrementer.DefaultIdentifierGenerator.<init>(Ljava/net/InetAddress;)V

The method's class, com.baomidou.mybatisplus.core.incrementer.DefaultIdentifierGenerator, is available from the following locations:

    jar:file:/D:/Maven/apache-maven-3.6.3-bin/apache-maven-3.6.3/maven-repo/com/baomidou/mybatis-plus-core/3.3.1/mybatis-plus-core-3.3.1.jar!/com/baomidou/mybatisplus/core/incrementer/DefaultIdentifierGenerator.class

The class hierarchy was loaded from the following locations:

    com.baomidou.mybatisplus.core.incrementer.DefaultIdentifierGenerator: file:/D:/Maven/apache-maven-3.6.3-bin/apache-maven-3.6.3/maven-repo/com/baomidou/mybatis-plus-core/3.3.1/mybatis-plus-core-3.3.1.jar


Action:

Correct the classpath of your application so that it contains a single, compatible version of com.baomidou.mybatisplus.core.incrementer.DefaultIdentifierGenerator


Process finished with exit code 1

解决办法

gulimall.product.config

MyBatisConfig.java

使用mybatisplus新分页插件MybatisPlusInterceptor

package com.doudou.gulimall.product.config;

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;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration//配置类
@EnableTransactionManagement//开启事务
@MapperScan("com.doudou.gulimall.product.dao")
public class MyBatisConfig {
    //引入分页插件
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor(){
        MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor();
        PaginationInnerInterceptor innerInterceptor = new PaginationInnerInterceptor();
        mybatisPlusInterceptor.addInnerInterceptor(innerInterceptor);
        return mybatisPlusInterceptor;
    }

}

• 3.4.0 以下版本
  应使用 PaginationInterceptor 类来实现分页功能

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.springframework.context.annotation.Configuration;

@Configuration//配置类
@EnableTransactionManagement//开启事务
@MapperScan("com.doudou.gulimall.product.dao")
public class MyBatisConfig {
	@Bean
    public PaginationInterceptor paginationInterceptor(){
        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
        return paginationInterceptor;
    }
}

• 3.4.0及以上版本
  应使用 MybatisPlusInterceptor 类来实现分页

package com.doudou.gulimall.product.config;

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;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration//配置类
@EnableTransactionManagement//开启事务
@MapperScan("com.doudou.gulimall.product.dao")
public class MyBatisConfig {
    //引入分页插件
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor(){
        MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor();
        PaginationInnerInterceptor innerInterceptor = new PaginationInnerInterceptor();
        mybatisPlusInterceptor.addInnerInterceptor(innerInterceptor);
        return mybatisPlusInterceptor;
    }

}

模糊查询

doudou.gulimall.product.service.impl

BrandServiceImpl.java

package com.doudou.gulimall.product.service.impl;

import org.springframework.stereotype.Service;
import java.util.Map;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.doudou.common.utils.PageUtils;
import com.doudou.common.utils.Query;

import com.doudou.gulimall.product.dao.BrandDao;
import com.doudou.gulimall.product.entity.BrandEntity;
import com.doudou.gulimall.product.service.BrandService;
import org.springframework.util.StringUtils;


@Service("brandService")
public class BrandServiceImpl extends ServiceImpl<BrandDao, BrandEntity> implements BrandService {

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        //1.获取key
        String key = (String) params.get("key");
        QueryWrapper<BrandEntity> queryWrapper = new QueryWrapper<>();
        if (!StringUtils.isEmpty(key)){
            queryWrapper.eq("brand_id",key).or().like("name",key);

        }

        IPage<BrandEntity> page = this.page(
                new Query<BrandEntity>().getPage(params),
                queryWrapper
        );

        return new PageUtils(page);
    }

}

新增测试数据

doudou.gulimall.product.controller

CategoryBrandRelationController.java

package com.doudou.gulimall.product.controller;

import java.util.Arrays;
import java.util.List;
import java.util.Map;

//import org.apache.shiro.authz.annotation.RequiresPermissions;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import com.doudou.gulimall.product.entity.CategoryBrandRelationEntity;
import com.doudou.gulimall.product.service.CategoryBrandRelationService;
import com.doudou.common.utils.PageUtils;
import com.doudou.common.utils.R;



/**
 * 品牌分类关联
 *
 * @author doudoutj111
 *
 * @date 2021-06-19 19:40:52
 */
@RestController
@RequestMapping("product/categorybrandrelation")
public class CategoryBrandRelationController {
    @Autowired
    private CategoryBrandRelationService categoryBrandRelationService;

    /**
     * 获取当前品牌关联的所有分类列表
     */
    //@RequestMapping(value = "/catelog/list",method = RequestMethod.GET)
    @GetMapping("/catelog/list")
    //@RequiresPermissions("product:categorybrandrelation:list")
    public R cateloglist(@RequestParam("brandId")Long brandId){
        List<CategoryBrandRelationEntity> data = categoryBrandRelationService.list(
                new QueryWrapper<CategoryBrandRelationEntity>().eq("brand_id",brandId));

        return R.ok().put("data", data);
    }


    /**
     * 列表
     */
    @RequestMapping("/list")
    //@RequiresPermissions("product:categorybrandrelation:list")
    public R list(@RequestParam Map<String, Object> params){
        PageUtils page = categoryBrandRelationService.queryPage(params);

        return R.ok().put("page", page);
    }


    /**
     * 信息
     */
    @RequestMapping("/info/{id}")
   // @RequiresPermissions("product:categorybrandrelation:info")
    public R info(@PathVariable("id") Long id){
		CategoryBrandRelationEntity categoryBrandRelation = categoryBrandRelationService.getById(id);

        return R.ok().put("categoryBrandRelation", categoryBrandRelation);
    }

    /**
     * 保存
     */
    @RequestMapping("/save")
  //  @RequiresPermissions("product:categorybrandrelation:save")
    public R save(@RequestBody CategoryBrandRelationEntity categoryBrandRelation){
		categoryBrandRelationService.saveDetail(categoryBrandRelation);

        return R.ok();
    }

    /**
     * 修改
     */
    @RequestMapping("/update")
  //  @RequiresPermissions("product:categorybrandrelation:update")
    public R update(@RequestBody CategoryBrandRelationEntity categoryBrandRelation){
		categoryBrandRelationService.updateById(categoryBrandRelation);

        return R.ok();
    }

    /**
     * 删除
     */
    @RequestMapping("/delete")
 //   @RequiresPermissions("product:categorybrandrelation:delete")
    public R delete(@RequestBody Long[] ids){
		categoryBrandRelationService.removeByIds(Arrays.asList(ids));

        return R.ok();
    }

}

doudou.gulimall.product.service.impl

CategoryBrandRelationServiceImpl.java

package com.doudou.gulimall.product.service.impl;

import org.springframework.stereotype.Service;
import java.util.Map;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.doudou.common.utils.PageUtils;
import com.doudou.common.utils.Query;

import com.doudou.gulimall.product.dao.CategoryBrandRelationDao;
import com.doudou.gulimall.product.entity.CategoryBrandRelationEntity;
import com.doudou.gulimall.product.service.CategoryBrandRelationService;


@Service("categoryBrandRelationService")
public class CategoryBrandRelationServiceImpl extends ServiceImpl<CategoryBrandRelationDao, CategoryBrandRelationEntity> implements CategoryBrandRelationService {

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<CategoryBrandRelationEntity> page = this.page(
                new Query<CategoryBrandRelationEntity>().getPage(params),
                new QueryWrapper<CategoryBrandRelationEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public void saveDetail(CategoryBrandRelationEntity categoryBrandRelation) {
        
    }

}

doudou.gulimall.product.service.impl

CategoryBrandRelationServiceImpl.java

package com.doudou.gulimall.product.service.impl;

import com.doudou.gulimall.product.dao.BrandDao;
import com.doudou.gulimall.product.dao.CategoryDao;
import com.doudou.gulimall.product.entity.BrandEntity;
import com.doudou.gulimall.product.entity.CategoryEntity;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.Map;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;以上是关于第187天学习打卡（项目 谷粒商城29 品牌分类与级联更新 ）的主要内容，如果未能解决你的问题，请参考以下文章
 
 第179天学习打卡（项目 谷粒商城21 删除 批量删除小结 品牌管理 效果优化与快速显示开关）
 第173天学习打卡（项目 谷粒商城 15 配置网关路由与路径重写 查询树形展示三级分类）
 第176天学习打卡（项目 谷粒商城 18 API三级分类 删除效果细化 新增效果）
 第195天学习打卡（项目 谷粒商城 37新增商品 获取分类下所有属性及分组）
 第172天学习打卡（项目 谷粒商城 14 三级分类 配置网关路由和路径重写）
 第175天学习打卡（项目 谷粒商城17 API三级分类 删除页面效果 逻辑删除）