java 生成微信的二维码 工具类

package com.app.wii.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import com.app.wx.webinterface.aotuzuche.InternalController;
import com.ods.common.util.ComFileManager;
import com.ods.common.util.HttpUtil;
import com.ods.common.util.PropUtil;
import com.ods.common.util.StringUtil;
import com.ods.service.impl.PrimaryKeyServiceImpl;

import net.sf.json.JSONObject;

public class QrCodeUtil {
private static Logger logger = LogManager.getLogger(QrCodeUtil.class.getName());
/**
* 生成二维码
* @param appid
* @param appsecret
* @param page
* @return
*/
public static String createQrcode(String appid,String appsecret,String page,String scene){
String result = "";
try {
String tokenurl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=SECRET";
tokenurl = tokenurl.replace("APPID", appid).replace("SECRET", appsecret);
logger.error("生成二维码的appid:"+appid);
String dd = HttpUtil.sendGet(tokenurl);
System.out.println(dd);
String access_token = (String) JSONObject.fromObject(dd).get("access_token");
String url = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=ACCESS_TOKEN".replace("ACCESS_TOKEN", access_token);
Map<String, Object> map = new HashMap<String, Object>();
map.put("scene", scene);
map.put("page", page);
map.put("width", 430);
map.put("auto_color", false);
result = httpPostWithJSON(url, JSONObject.fromObject(map).toString(), "QRcode");
} catch (Exception e) {
logger.error("创建二维码error"+e);
}
return result;
}
public static String httpPostWithJSON(String url, String json, String id) throws Exception {
String result = null;
try {
CloseableHttpClient httpClient = HttpClients.createDefault();

HttpPost httpPost = new HttpPost(url);
RequestConfig requestConfig = null;
/**
* 启用代理
*/
String proxyIp = PropUtil.getPropertyValue("ods.http.proxy.server", "10.74.46.21:8002").replace("\"", "");
String[] proxIpArray = proxyIp.split(":");
String proxyHost = proxIpArray[0];
int proxyPort = Integer.valueOf(proxIpArray[1]);
HttpHost proxy = new HttpHost(proxyHost, proxyPort);
requestConfig = RequestConfig.custom().setProxy(proxy).build();
httpPost.setConfig(requestConfig);
httpPost.addHeader(HTTP.CONTENT_TYPE, "application/json");

StringEntity se = new StringEntity(json);
se.setContentType("application/json");
se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "UTF-8"));
httpPost.setEntity(se);
// httpClient.execute(httpPost);
HttpResponse response = httpClient.execute(httpPost);
logger.error("生成非车代付二维码的响应response:"+response);
if (response != null) {
HttpEntity resEntity = response.getEntity();
if (resEntity != null) {
InputStream instreams = resEntity.getContent();
File uploadSysUrl = new File(".\\" + "tempFile");
File saveFile = new File(uploadSysUrl.getCanonicalPath() + id + ".png"); // 判断这个文件（saveFile）是否存在
if (!saveFile.getParentFile().exists()) { // 如果不存在就创建这个文件夹
saveFile.getParentFile().mkdirs();
}
saveToImgByInputStream(instreams, uploadSysUrl.getCanonicalPath(), id + ".png");
// 建立数据的上传通道
FileInputStream fileInputStream = new FileInputStream(saveFile);
String returnStr = ComFileManager.FileUpload(fileInputStream, "scanimeg.png", "wii", "car_quote");
JSONObject objectscanurl = JSONObject.fromObject(returnStr);
result = (String) objectscanurl.get("id");
deleteUploadFile(saveFile.toString());
}
}
httpPost.abort();
} catch (Exception e) {
logger.error("httpPost"+e);
}
return result;
}
/*
* @param instreams 二进制流
*
* @param imgPath 图片的保存路径
*
* @param imgName 图片的名称
*
* @return 1：保存正常 0：保存失败
*/
public static int saveToImgByInputStream(InputStream instreams, String imgPath, String imgName) {

int stateInt = 1;
if (instreams != null) {
try {
File file = new File(imgPath + imgName);// 可以是任何图片格式.jpg,.png等
FileOutputStream fos = new FileOutputStream(file);

byte[] b = new byte[1024];
int nRead = 0;
while ((nRead = instreams.read(b)) != -1) {
fos.write(b, 0, nRead);
}
fos.flush();
fos.close();
} catch (Exception e) {
stateInt = 0;
e.printStackTrace();
} finally {
try {
instreams.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return stateInt;
}
/**
* 删除临时二维码
*
* @Description (TODO这里用一句话描述这个方法的作用)
* @param address
* @return
*/
private static String deleteUploadFile(String address) {
File file = new File(address);
if (file.isFile() && file.exists()) {
file.delete();
return "success";
} else {
return "false";
}
}
}