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