Spring Boot 生成和显示二维码

Posted 2022-01-28 yqj234

package com.myapp.controller;

import java.io.OutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.util.ClassUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.myapp.util.QrCodeUtil;

@RequestMapping("/barcode")
@Controller
public class QrCodeController 

	// 生成带logo的二维码到response
	@RequestMapping("/qrcode")
	public void qrcode(HttpServletRequest request, HttpServletResponse response) 
		String requestUrl = "http://www.baidu.com";
		try 

			String path = ClassUtils.getDefaultClassLoader().getResource("static/logo.jpeg").getPath();

			OutputStream os = response.getOutputStream();
			QrCodeUtil.encode(requestUrl, path, os);
		 catch (Exception e) 
			e.printStackTrace();
		
	

	// 生成不带logo的二维码到response
	@RequestMapping("/qrnologo")
	public void qrnologo(HttpServletRequest request, HttpServletResponse response) 
		String requestUrl = "http://www.baidu.com";
		try 
			OutputStream os = response.getOutputStream();
			QrCodeUtil.encode(requestUrl, null, os);
		 catch (Exception e) 
			e.printStackTrace();
		
	

	// 把二维码保存成文件
	@RequestMapping("/qrsave")
	@ResponseBody
	public String qrsave() 
		String requestUrl = "http://www.baidu.com";
		try 
			QrCodeUtil.save(requestUrl, null, "/data/qrcode2.jpg");
			return "文件已保存";
		 catch (Exception e) 
			e.printStackTrace();
			return "文件保存失败" + e.getMessage();
		

	

	// 解析二维码中的文字
	@RequestMapping("/qrtext")
	@ResponseBody
	public String qrtext() 
		String url = "";
		try 
			url = QrCodeUtil.decode("/data/qrcode2.jpg");
		 catch (Exception e) 
			e.printStackTrace();
		
		return "解析到的url:" + url;