package com.eq.common;
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 UrlUtil {
/**
* 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<String, ?> paramMap) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
String param = "";
Iterator<String> 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.eq.common;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import com.alibaba.fastjson.JSONObject;
import com.eq.common.BaseConfig;
import com.eq.qrCode.QrCodeUtil;
/**
* 生成小程序二维码
* author : Wcb
*/
public class TwoCode {
/*
* 获取 token
* 普通的 get 可获 token
*/
public static String getToken() {
try {
Map<String, String> map = new LinkedHashMap<String, String>();
map.put("grant_type", "client_credential");
map.put("appid",BaseConfig.eatProperties.get("wechat.appid"));//改成自己的appid
map.put("secret",BaseConfig.eatProperties.get("wechat.secret"));
String rt = UrlUtil.sendPost("https://api.weixin.qq.com/cgi-bin/token", map);
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;
}
}
/**
* 生成小程序二维码<p>
* @param accessToken<p>
* @param logoPath 背景图logo<p>
* @param savePath 二维码存放路径<p>
* @param jumpPath 扫二维码跳转的路径<p>
*/
public static void getminiqrQrAddLogo(String accessToken,String logoPath,String savePath,String jumpPath) {
BufferedInputStream bis = null;
OutputStream os = null;
try
{
URL url = new URL("https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token="+accessToken);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");// 提交模式
// 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();
paramJson.put("path",jumpPath);
paramJson.put("width", 430);
printWriter.write(paramJson.toString());
// flush输出流的缓冲
printWriter.flush();
//开始获取数据
bis = new BufferedInputStream(httpURLConnection.getInputStream());
BufferedImage image =ImageIO.read(bis);
//这一行是调用工具类换背景图的
QrCodeUtil.drawLogo(image, logoPath, 0.3);
os = new FileOutputStream(new File(savePath));
ImageIO.write(image,"jpg", os);
}
catch (Exception e)
{
e.printStackTrace();
}finally{
try {
if (bis != null) {
bis.close();
}
if(os != null){
os.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}