锋哥原创的uniapp微信小程序投票系统实战:
sql
create table `t_vote_detail` (
`id` int (11),
`vote_id` int (11),
`vote_item_id` int (11),
`vote_date` datetime ,
`openid` varchar (600)
);
新建VoteDetail实体:
java
package com.java1234.entity;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableName;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import lombok.Data;
import java.util.Date;
/**投票详情
* @author java1234_小锋 (公众号:java1234)
* @site www.java1234.vip
* @company 南通小锋网络科技有限公司
*/
@TableName("t_vote_detail")
@Data
public class VoteDetail {
private Integer id; // 编号
private Integer voteId; // 投票ID
private Integer voteItemId; // 投票选项ID
private String openid; // 投票人openid
@TableField(select=false,exist = false)
private WxUserInfo wxUserInfo;
@JsonSerialize(using=CustomDateTimeSerializer.class)
private Date voteDate; // 投票时间
}
新建VoteDetailMapper
java
package com.java1234.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.java1234.entity.VoteDetail;
/**
* 投票详情Mapper接口
* @author java1234_小锋
* @site www.java1234.com
* @company 南通小锋网络科技有限公司
* @create 2022-02-23 22:00
*/
public interface VoteDetailMapper extends BaseMapper<VoteDetail>{
}
新建IVoteDetailService
java
package com.java1234.service;
import com.baomidou.mybatisplus.extension.service.IService;
import com.java1234.entity.VoteDetail;
/**
* 投票详情Service接口
* @author java1234_小锋
* @site www.java1234.com
* @company 南通小锋网络科技有限公司
* @create 2022-02-23 22:01
*/
public interface IVoteDetailService extends IService<VoteDetail> {
}
新建IVoteDetailServiceImpl
java
package com.java1234.service.impl;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.java1234.entity.VoteDetail;
import com.java1234.mapper.VoteDetailMapper;
import com.java1234.service.IVoteDetailService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
* 投票详情Service实现类
* @author java1234_小锋
* @site www.java1234.com
* @company 南通小锋网络科技有限公司
* @create 2022-02-23 22:02
*/
@Service("voteDetailService")
public class IVoteDetailServiceImpl extends ServiceImpl<VoteDetailMapper, VoteDetail> implements IVoteDetailService {
@Autowired
private VoteDetailMapper voteDetailMapper;
}
新建VoteDetailController
java
package com.java1234.controller;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.java1234.entity.R;
import com.java1234.entity.VoteDetail;
import com.java1234.entity.VoteItem;
import com.java1234.service.IVoteDetailService;
import com.java1234.service.IVoteItemService;
import com.java1234.util.JwtUtils;
import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.*;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
/**
* 投票详情Controller控制器
* @author java1234_小锋 (公众号:java1234)
* @site www.java1234.vip
* @company 南通小锋网络科技有限公司
*/
@RestController
@RequestMapping("/voteDetail")
public class VoteDetailController {
@Autowired
private IVoteDetailService voteDetailService;
@Autowired
private IVoteItemService voteItemService;
/**
* 添加投票
* @param voteDetail
* @param token
* @return
*/
@RequestMapping("/add")
@Transactional
public R add(@RequestBody VoteDetail voteDetail, @RequestHeader String token){
System.out.println("token="+token);
Claims claims = JwtUtils.validateJWT(token).getClaims();
System.out.println("openid="+claims.getId());
String openid=claims.getId();
int count = voteDetailService.count(new QueryWrapper<VoteDetail>().eq("openid", openid).eq("vote_id", voteDetail.getVoteId()));
Map<String,Object> resultMap=new HashMap<>();
if(count>0){
resultMap.put("info","您已经投票过,不能重复投票!");
}else {
resultMap.put("info", "投票成功!");
voteDetail.setOpenid(openid);
voteDetail.setVoteDate(new Date());
// 对指定投票项的number+1操作
VoteItem voteItem=new VoteItem();
voteItem.setId(voteDetail.getVoteItemId());
voteItemService.update(new UpdateWrapper<VoteItem>().setSql("number=number+1").eq("id",voteDetail.getVoteItemId()));
voteDetailService.save(voteDetail);
}
return R.ok(resultMap);
}
}
前端投票提交:
java
submitVote:async function(e){
let form={
voteItemId:this.sItem,
voteId:this.vote.id
}
const result=await requestUtil({url:"/voteDetail/add",data:form,method:"post"});
if(result.code==0){
uni.showToast({
icon:"success",
title:result.info
})
}
}