不需要授权的登录，只能获取到openId,有openId便可从数据库中关联到平台中的用户。
引入包：
<!--微信开源封装sdk--> <dependency> <groupId>com.github.binarywang</groupId> <artifactId>weixin-java-miniapp</artifactId> <version>3.6.0</version> </dependency>
WxMaConfiguration：
package com.haiyeren.config;import cn.binarywang.wx.miniapp.api.WxMaService;import cn.binarywang.wx.miniapp.api.impl.WxMaServiceImpl;import cn.binarywang.wx.miniapp.bean.WxMaKefuMessage;import cn.binarywang.wx.miniapp.bean.WxMaTemplateData;import cn.binarywang.wx.miniapp.bean.WxMaTemplateMessage;import cn.binarywang.wx.miniapp.config.impl.WxMaDefaultConfigImpl;import cn.binarywang.wx.miniapp.message.WxMaMessageHandler;import cn.binarywang.wx.miniapp.message.WxMaMessageRouter;import com.google.common.collect.Lists;import com.google.common.collect.Maps;import me.chanjar.weixin.common.bean.result.WxMediaUploadResult;import me.chanjar.weixin.common.error.WxErrorException;import java.io.File;import java.util.Map;/** * @author <a href="https://github.com/binarywang">Binary Wang</a> */public class WxMaConfiguration { private static Map<String, WxMaMessageRouter> routers = Maps.newHashMap(); private static Map<String, WxMaService> maServices = Maps.newHashMap(); public static WxMaService getMaService(String appid, String secret) { WxMaDefaultConfigImpl config = new WxMaDefaultConfigImpl(); config.setAppid(appid); config.setSecret(secret); config.setToken(""); config.setAesKey(""); config.setMsgDataFormat("JSON"); WxMaService service = new WxMaServiceImpl(); service.setWxMaConfig(config); return service; } public static WxMaMessageRouter getRouter(String appid) { return routers.get(appid); } private WxMaMessageRouter newRouter(WxMaService service) { final WxMaMessageRouter router = new WxMaMessageRouter(service); router .rule().handler(logHandler).next() .rule().async(false).content("模板").handler(templateMsgHandler).end() .rule().async(false).content("文本").handler(textHandler).end() .rule().async(false).content("图片").handler(picHandler).end() .rule().async(false).content("二维码").handler(qrcodeHandler).end(); return router; } private final WxMaMessageHandler templateMsgHandler = (wxMessage, context, service, sessionManager) -> { service.getMsgService().sendTemplateMsg(WxMaTemplateMessage.builder() .templateId("此处更换为自己的模板id") .formId("自己替换可用的formid") .data(Lists.newArrayList( new WxMaTemplateData("keyword1", "339208499", "#173177"))) .toUser(wxMessage.getFromUser()) .build()); return null; }; private final WxMaMessageHandler logHandler = (wxMessage, context, service, sessionManager) -> { System.out.println("收到消息：" + wxMessage.toString()); service.getMsgService().sendKefuMsg(WxMaKefuMessage.newTextBuilder().content("收到信息为：" + wxMessage.toJson()) .toUser(wxMessage.getFromUser()).build()); return null; }; private final WxMaMessageHandler textHandler = (wxMessage, context, service, sessionManager) -> { service.getMsgService().sendKefuMsg(WxMaKefuMessage.newTextBuilder().content("回复文本消息") .toUser(wxMessage.getFromUser()).build()); return null; }; private final WxMaMessageHandler picHandler = (wxMessage, context, service, sessionManager) -> { try { WxMediaUploadResult uploadResult = service.getMediaService() .uploadMedia("image", "png", ClassLoader.getSystemResourceAsStream("tmp.png")); service.getMsgService().sendKefuMsg( WxMaKefuMessage .newImageBuilder() .mediaId(uploadResult.getMediaId()) .toUser(wxMessage.getFromUser()) .build()); } catch (WxErrorException e) { e.printStackTrace(); } return null; }; private final WxMaMessageHandler qrcodeHandler = (wxMessage, context, service, sessionManager) -> { try { final File file = service.getQrcodeService().createQrcode("123", 430); WxMediaUploadResult uploadResult = service.getMediaService().uploadMedia("image", file); service.getMsgService().sendKefuMsg( WxMaKefuMessage .newImageBuilder() .mediaId(uploadResult.getMediaId()) .toUser(wxMessage.getFromUser()) .build()); } catch (WxErrorException e) { e.printStackTrace(); } return null; };}
后台代码(xcxAppId和xcxSecret需要自己填)：
@ApiOperation(value = "小程序登录,只获取openid") @PostMapping("loginByWeixin") public ResultVo<WeixinLoginVo> loginByWeixin(String code) throws Exception { ResultVo<WeixinLoginVo> result = new ResultVo<>(); WeixinLoginVo weixinLoginVo = new WeixinLoginVo(); //获取openid //通过自定义工具类组合出小程序需要的登录凭证 code String xcxAppId = "xxxx"; String xcxSecret = "xxxx"; //其他商城的小程序 final WxMaService wxService = WxMaConfiguration.getMaService(xcxAppId, xcxSecret); WxMaJscode2SessionResult session = wxService.getUserService().getSessionInfo(code); String openid = session.getOpenid(); QueryWrapper<UserEntity> queryWrapper = new QueryWrapper<>(); queryWrapper.lambda().eq(UserEntity::getOpenid,openid); UserEntity user=userService.getOne(queryWrapper); if(null==user) { user=new UserEntity(); user.setOpenid(openid); userService.save(user); } String tokenId = tokenService.getTokenId(user.getId(), ""); weixinLoginVo.setOpenid(openid); weixinLoginVo.setOpenid(tokenId); result.setData(weixinLoginVo); return result; }
WeixinLoginVo：
package com.haiyeren.entity.vo;import io.swagger.annotations.ApiModel;import io.swagger.annotations.ApiModelProperty;import lombok.Data;@ApiModel("小程序登录返回")@Datapublic class WeixinLoginVo { @ApiModelProperty(value="登录令牌") private String token; @ApiModelProperty(value="openid") private String openid;}
小程序端登录代码：
login: function () { var that = this; wx.login({ success: res => { // 发送 res.code 到后台换取 openId, sessionKey, unionId console.log("res.code:", res.code) if (res.code) { //发起网络请求 wx.request({ url: '', data: { code: res.code }, header: { 'content-type': 'application/x-www-form-urlencoded' }, method: 'POST', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT success: function (res) { console.log('登陆回调', res); if (res.data.status == 1) { that.globalData.token = res.data.data.token; that.globalData.openid = res.data.data.openid; } if (res.data.status != 1) { // 登录错误 // wx.hideLoading(); wx.showModal({ title: '提示', content: '无法登录，请重试', showCancel: false }) return; } }, fail: function (failRes) { //用户未授权会调用失败，调用失败就进这里 // wx.hideLoading(); } }) } else { console.log('获取用户登录态失败！' + res.errMsg) } } }) }