微信生成二维码 基于binarywang封装的微信工具包生成二维码

<dependency>
  <groupId>com.github.binarywang</groupId>
  <artifactId>weixin-java-miniapp</artifactId>
  <version>3.5.0</version>
</dependency>

<dependency>
  <groupId>com.github.binarywang</groupId>
  <artifactId>weixin-java-common</artifactId>
  <version>3.5.0</version>
</dependency>

  @ApiOperation("生成二维码")
  @ApiImplicitParams({
      @ApiImplicitParam(name="codeType",value = "类型",dataType = "String",required = true,paramType = "query"),
      @ApiImplicitParam(name="parameterValue",value = "参数值",dataType = "String",required = true,paramType = "query")
  })
  @GetMapping(value = "/createQrCode")
  public String createQrCode(@RequestParam("codeType") String codeType,
                @RequestParam("parameterValue") String parameterValue) throws HttpProcessException, IOException {
	//调用工具包的服务
    WxMaService wxMaService = new WxMaServiceImpl();
    WxMaDefaultConfigImpl wxMaDefaultConfigImpl = new WxMaDefaultConfigImpl();
    wxMaDefaultConfigImpl.setAppid(WxConfig.appid);		//小程序appId
    wxMaDefaultConfigImpl.setSecret(WxConfig.secret);	//小程序secret
    wxMaService.setWxMaConfig(wxMaDefaultConfigImpl);

    // 设置小程序二维码线条颜色为黑色
    WxMaCodeLineColor lineColor = new WxMaCodeLineColor("0", "0", "0");
    byte[] qrCodeBytes = null;
    try {
	  //其中codeType以及parameterValue为前端页面所需要接收的参数。
      qrCodeBytes = wxMaService.getQrcodeService().createWxaCodeBytes("pages/index/index?codeType=" + codeType + "¶meterValue=" + parameterValue, 30, false, lineColor, false);
    } catch (WxErrorException e) {
      e.printStackTrace();
    }
    String qrCodeStr= Base64.encodeBase64String(qrCodeBytes);
    return qrCodeStr;
  }