java获取微信公众号二维码

引入依赖：

<dependency>
	<groupId>com.github.binarywang</groupId>
	<artifactId>weixin-java-mp</artifactId>
	<version>3.9.0</version>
</dependency>

代码：

try {
          
   

	String url = null;
	WxMpDefaultConfigImpl wxMpDefaultConfig = new WxMpDefaultConfigImpl();
	wxMpDefaultConfig.setAppId("wxxxxxxxxxxxxx");
	wxMpDefaultConfig.setSecret("aaaaaaaaaaaaaaaaaa");
	wxMpDefaultConfig.setToken("");
	wxMpDefaultConfig.setAesKey("");
	
	WxMpService wxMpService = new WxMpServiceImpl();
	wxMpService.setWxMpConfigStorage(wxMpDefaultConfig);
	
	//换取临时二维码ticket，设置过期时间-最大不超过2592000（即30天）。
	WxMpQrCodeTicket ticket = wxMpService.getQrcodeService().qrCodeCreateTmpTicket("login_"+new Date().getTime(),2592000);
	
	//换取永久二维码ticket
	//WxMpQrCodeTicket ticket = wxConfig.getWxMpService().getQrcodeService().qrCodeCreateLastTicket(sceneId);
	
	//拿ticket换取二维码图片url地址
	url = wxMpService.getQrcodeService().qrCodePictureUrl(ticket.getTicket());
	System.out.println(url);

} catch (Exception e){
          
   
	e.printStackTrace();
}