微信生成二维码（带参数scene）
参考微信文档，这是最主要的，一切以这个为主
微信生成二维码参考文档
下面是Controller层
/**
* 接收二维码
* @param request
* @return
* @throws IOException
*/
@ApiResponses(value = { @ApiResponse(code = 100, message = "请求成功") })
@ApiOperation(value = "接收二维码")
@PostMapping(value="/twoCode")
public Object twoCode(@RequestBody TwoCodeParameters twoCodeParameters,HttpServletRequest request) {
// 获取accessToken
String accessToken = TwoCode.getToken();
// 获取图片地址
String imageUrl = TwoCode.getminiqrQr(accessToken, twoCodeParameters,request);
// 返回地址给前端
JSONObject data = new JSONObject();
data.put("imageUrl",imageUrl);
return data;
}
下面的是两个工具类，仅供参考
package com.bixin.user.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.Iterator;
import java.util.Map;
public class WXUrlUtil {
/**
* 向指定 URL 发送POST方法的请求
*
* @param url 发送请求的 URL
* @param param 请求参数
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, Map paramMap) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
String param = "";
Iterator it = paramMap.keySet().iterator();
while(it.hasNext()) {
String key = it.next();
param += key + "=" + paramMap.get(key) + "&";
}
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("Accept-Charset", "utf-8");
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println(e);
}
//使用finally块来关闭输出流、输入流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex) {
ex.printStackTrace();
}
}
return result;
}
}
package com.bixin.user.util;
import com.alibaba.fastjson.JSONObject;
import com.bixin.user.model.TwoCodeParameters;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.LinkedHashMap;
import java.util.Map;
public class TwoCode {
/*
* 获取 token
* 普通的 get 可获 token
*/
public static String getToken() {
try {
Map map = new LinkedHashMap();
map.put("grant_type", "client_credential");
map.put("appid", "改成自己的appid");//
map.put("secret", "改成自己的secret");
String rt = WXUrlUtil.sendPost("https://api.weixin.qq.com/cgi-bin/token", map);
System.out.println("what is:" + rt);
JSONObject json = JSONObject.parseObject(rt);
if (json.getString("access_token") != null || json.getString("access_token") != "") {
return json.getString("access_token");
} else {
return null;
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/*
* 获取 二维码图片
*
*/
public static String getminiqrQr(String accessToken, TwoCodeParameters twoCodeParameters,HttpServletRequest request) {
String codeUrl = "D:\\imageTest\\"+twoCodeParameters.getExtensionId()+".jpg";
String twoCodeUrl = "http://192.168.31.213:8020/images/"+twoCodeParameters.getExtensionId()+".jpg";
try {
URL url = new URL("https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=" + accessToken);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");// 提交模式
// conn.setConnectTimeout(10000);//连接超时 单位毫秒
// conn.setReadTimeout(2000);//读取超时 单位毫秒
// 发送POST请求必须设置如下两行
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
// 获取URLConnection对象对应的输出流
PrintWriter printWriter = new PrintWriter(httpURLConnection.getOutputStream());
// 发送请求参数
JSONObject paramJson = new JSONObject();
long timeMillis = System.currentTimeMillis();
// paramJson.put("scene", "extensionId="+twoCodeParameters.getExtensionId()+"&extensionType="+twoCodeParameters.getExtensionType());
paramJson.put("scene", twoCodeParameters.getExtensionId() +"&"+ twoCodeParameters.getExtensionType());
paramJson.put("page", "pages/views/vip-center");
paramJson.put("width", 430);
paramJson.put("is_hyaline", false);
//line_color生效
paramJson.put("auto_color", false);
JSONObject lineColor = new JSONObject();
lineColor.put("r", 0);
lineColor.put("g", 0);
lineColor.put("b", 0);
paramJson.put("line_color", lineColor);
printWriter.write(paramJson.toString());
// flush输出流的缓冲
printWriter.flush();
//开始获取数据
BufferedInputStream bis = new BufferedInputStream(httpURLConnection.getInputStream());
OutputStream os = new FileOutputStream(new File(codeUrl));
int len;
byte[] arr = new byte[1024];
while ((len = bis.read(arr)) != -1) {
os.write(arr, 0, len);
os.flush();
}
os.close();
} catch (Exception e) {
e.printStackTrace();
}
return twoCodeUrl;
}
}
还有一个映射穿透配置类（当然也可以在配置文件里做配置，下面会给一张图）
package com.bixin.user.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
@Configuration
public class GHCWebMvcConfig extends WebMvcConfigurationSupport {
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
// TODO Auto-generated method stub
registry.addResourceHandler("/images/**").addResourceLocations("file:D:/imageTest/");
super.addResourceHandlers(registry);
}
}
微信小程序码的生成（java）