package com.ruoyi.framework.handler;

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Date;

/**
 * 自定義元對(duì)象處理器，用于在數(shù)據(jù)庫(kù)操作中自動(dòng)填充創(chuàng)建時(shí)間和更新時(shí)間。
 * @Component 注解表示該類是一個(gè)Spring Bean，可以被其他Bean依賴注入。
 */
@Component
public class MyMetaObjectHandler implements MetaObjectHandler {

    /**
     * 在插入數(shù)據(jù)時(shí)自動(dòng)填充創(chuàng)建時(shí)間和更新時(shí)間。
     * @param metaObject 元對(duì)象，代表待插入的數(shù)據(jù)對(duì)象。
     * 使用反射機(jī)制，通過字段名設(shè)置字段值，實(shí)現(xiàn)創(chuàng)建時(shí)間和更新時(shí)間的自動(dòng)填充。
     */
    @Override
    public void insertFill(MetaObject metaObject) {
        Date now = Date.from(LocalDateTime.now().atZone(ZoneId.systemDefault()).toInstant());
        this.setFieldValByName("createTime", now, metaObject);
        this.setFieldValByName("updateTime", now, metaObject);
    }

    /**
     * 在更新數(shù)據(jù)時(shí)自動(dòng)填充更新時(shí)間。
     * @param metaObject 元對(duì)象，代表待更新的數(shù)據(jù)對(duì)象。
     * 使用反射機(jī)制，通過字段名設(shè)置字段值，實(shí)現(xiàn)更新時(shí)間的自動(dòng)填充。
     */
    @Override
    public void updateFill(MetaObject metaObject) {
        Date now = Date.from(LocalDateTime.now().atZone(ZoneId.systemDefault()).toInstant());
        this.setFieldValByName("updateTime", now, metaObject);
    }
}

package com.ruoyi.common.core.domain;

import java.io.Serializable;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonInclude;

/**
 * Entity基類
 * 
 * @author ruoyi
 */
public class BaseEntity implements Serializable
{
    private static final long serialVersionUID = 1L;

    /** 搜索值 */
    @JsonIgnore
    @TableField(exist=false)
    private String searchValue;

    /** 創(chuàng)建者 */
    private String createBy;

    /** 創(chuàng)建時(shí)間 TableField自動(dòng)維護(hù)*/
    @TableField(fill = FieldFill.INSERT)
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date createTime;

    /** 更新者 */
    private String updateBy;

    /** 更新時(shí)間 TableField自動(dòng)維護(hù)*/
    @TableField(fill = FieldFill.INSERT_UPDATE)
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date updateTime;

    /** 備注 */
    private String remark;

    /** 請(qǐng)求參數(shù) */
    @JsonInclude(JsonInclude.Include.NON_EMPTY)
    @TableField(exist=false)
    private Map<String, Object> params;

    public String getSearchValue()
    {
        return searchValue;
    }

    public void setSearchValue(String searchValue)
    {
        this.searchValue = searchValue;
    }

    public String getCreateBy()
    {
        return createBy;
    }

    public void setCreateBy(String createBy)
    {
        this.createBy = createBy;
    }

    public Date getCreateTime()
    {
        return createTime;
    }

    public void setCreateTime(Date createTime)
    {
        this.createTime = createTime;
    }

    public String getUpdateBy()
    {
        return updateBy;
    }

    public void setUpdateBy(String updateBy)
    {
        this.updateBy = updateBy;
    }

    public Date getUpdateTime()
    {
        return updateTime;
    }

    public void setUpdateTime(Date updateTime)
    {
        this.updateTime = updateTime;
    }

    public String getRemark()
    {
        return remark;
    }

    public void setRemark(String remark)
    {
        this.remark = remark;
    }

    public Map<String, Object> getParams()
    {
        if (params == null)
        {
            params = new HashMap<>();
        }
        return params;
    }

    public void setParams(Map<String, Object> params)
    {
        this.params = params;
    }
}

package com.ruoyi.framework.config;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.BlockAttackInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.OptimisticLockerInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * Mybatis Plus 配置
 *
 * @author ruoyi
 */
@EnableTransactionManagement(proxyTargetClass = true)
@Configuration
public class MybatisPlusConfig
{
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor()
    {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        // 分頁(yè)插件
        interceptor.addInnerInterceptor(paginationInnerInterceptor());
        // 樂觀鎖插件
        interceptor.addInnerInterceptor(optimisticLockerInnerInterceptor());
        // 阻斷插件
        interceptor.addInnerInterceptor(blockAttackInnerInterceptor());
        return interceptor;
    }

    /**
     * 分頁(yè)插件，自動(dòng)識(shí)別數(shù)據(jù)庫(kù)類型 https://baomidou.com/guide/interceptor-pagination.html
     */
    public PaginationInnerInterceptor paginationInnerInterceptor()
    {
        PaginationInnerInterceptor paginationInnerInterceptor = new PaginationInnerInterceptor();
        // 設(shè)置數(shù)據(jù)庫(kù)類型為mysql
        paginationInnerInterceptor.setDbType(DbType.MYSQL);
        // 設(shè)置最大單頁(yè)限制數(shù)量，默認(rèn) 500 條，-1 不受限制
        paginationInnerInterceptor.setMaxLimit(-1L);
        return paginationInnerInterceptor;
    }

    /**
     * 樂觀鎖插件 https://baomidou.com/guide/interceptor-optimistic-locker.html
     */
    public OptimisticLockerInnerInterceptor optimisticLockerInnerInterceptor()
    {
        return new OptimisticLockerInnerInterceptor();
    }

    /**
     * 如果是對(duì)全表的刪除或更新操作，就會(huì)終止該操作 https://baomidou.com/guide/interceptor-block-attack.html
     */
    public BlockAttackInnerInterceptor blockAttackInnerInterceptor()
    {
        return new BlockAttackInnerInterceptor();
    }
}