liuchuang
6 years ago
15 changed files with 292 additions and 27 deletions
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package com.elink.esua.epdc.commons.tools.utils; |
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import cn.hutool.http.HttpResponse; |
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import com.alibaba.fastjson.JSONObject; |
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import org.apache.commons.codec.binary.Base64; |
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import org.apache.commons.lang3.StringUtils; |
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import org.springframework.http.HttpEntity; |
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import sun.net.www.http.HttpClient; |
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import java.io.*; |
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import java.net.HttpURLConnection; |
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import java.net.URL; |
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import java.util.Map; |
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/** |
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* @Author LC |
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* @Date 2019/9/11 14:53 |
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*/ |
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public class UploadImageUtils { |
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/** |
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* 从微信下载图片 |
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* @Params: [params] |
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* @Return: java.lang.String |
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* @Author: liuchuang |
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* @Date: 2019/9/11 17:04 |
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*/ |
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public static String downloadImageFromWx(Map<String, String> params) throws Exception { |
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InputStream inputStream = getMediaStream(params.get("accessTokenUrl"), params.get("mediaUrl"), params.get("mediaId"), params.get("appid"), params.get("secret")); |
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if (null == inputStream) { |
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return null; |
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} |
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byte[] data = null; |
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ByteArrayOutputStream swapStream = new ByteArrayOutputStream(); |
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byte[] buffer = new byte[1024]; |
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int len = 0; |
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while((len = inputStream.read(buffer, 0, 1024)) != -1){ |
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swapStream.write(buffer, 0, len); |
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} |
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data = swapStream.toByteArray(); |
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String base64 = "data:image/png;base64,"+Base64.encodeBase64String(data); |
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return base64; |
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} |
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/** |
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* 获取临时素材 |
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*/ |
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private static InputStream getMediaStream(String accessTokenUrl, String mediaUrl, String mediaId, String appid, String secret)throws IOException { |
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String access_token = getAccessToken(accessTokenUrl, appid, secret); |
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String params = "access_token=" + access_token + "&media_id=" + mediaId; |
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InputStream is = null; |
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try { |
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String urlNameString = mediaUrl + "?" + params; |
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URL urlGet = new URL(urlNameString); |
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HttpURLConnection http = (HttpURLConnection) urlGet.openConnection(); |
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http.setRequestMethod("GET"); // 必须是get方式请求
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http.setRequestProperty("Content-Type","application/x-www-form-urlencoded"); |
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http.setDoOutput(true); |
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http.setDoInput(true); |
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http.connect(); |
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if (!http.getContentType().contains("image")) { |
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return null; |
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} |
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// 获取文件转化为byte流
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is = http.getInputStream(); |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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return is; |
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} |
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/** |
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* 获取微信Jsapi的accessToken |
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* 这里获取的获取微信Jsapi的accessToken跟小程序以及其他的不一样 |
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*/ |
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public static String getAccessToken(String accessTokenUrl, String appId, String secret) { |
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accessTokenUrl = accessTokenUrl.replace("APPID", appId).replace("APPSECRET", secret); |
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JSONObject jsonObj = doHttpGet(accessTokenUrl); |
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String accessToken = jsonObj.getString("access_token"); |
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return accessToken; |
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} |
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/** |
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* 发送GET请求 |
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* @Params: [requestUrl, params] |
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* @Return: java.lang.String |
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* @Author: liuchuang |
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* @Date: 2019/8/5 14:25 |
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*/ |
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public static JSONObject doHttpGet(String requestUrl) { |
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JSONObject jsonObj = null; |
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// buffer用于接受返回的字符
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StringBuffer buffer = new StringBuffer(); |
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try { |
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// 建立URL，把请求地址给补全，其中urlEncode()方法用于把params里的参数给取出来
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URL url = new URL(requestUrl); |
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// 打开http连接
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HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection(); |
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httpUrlConn.setDoInput(true); |
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httpUrlConn.setRequestMethod("GET"); |
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httpUrlConn.connect(); |
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// 获得输入
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InputStream inputStream = httpUrlConn.getInputStream(); |
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InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "UTF-8"); |
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BufferedReader bufferedReader = new BufferedReader(inputStreamReader); |
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// 将bufferReader的值给放到buffer里
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String str = null; |
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while ((str = bufferedReader.readLine()) != null) { |
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buffer.append(str); |
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} |
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// 关闭bufferReader和输入流
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bufferedReader.close(); |
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inputStreamReader.close(); |
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inputStream.close(); |
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// 断开连接
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httpUrlConn.disconnect(); |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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jsonObj = JSONObject.parseObject(buffer.toString()); |
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return jsonObj; |
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} |
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} |
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@ -0,0 +1,38 @@ |
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package com.elink.esua.epdc.dto.form; |
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import lombok.Data; |
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import javax.validation.constraints.NotBlank; |
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import java.io.Serializable; |
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/** |
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* 图片上传Form DTO |
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* @Author LC |
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* @Date 2019/9/11 16:27 |
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*/ |
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@Data |
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public class UploadImageFormDTO implements Serializable { |
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private static final long serialVersionUID = -4670602967272919640L; |
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/** |
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* 文件标识 |
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*/ |
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@NotBlank(message = "文件标识不能为空") |
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private String mediaId; |
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/** |
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* 获取accessToken地址 |
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*/ |
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private String accessTokenUrl; |
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/** |
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* 下载文件地址 |
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*/ |
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private String mediaUrl; |
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/** |
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* appid |
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*/ |
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private String appid; |
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/** |
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* secret |
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*/ |
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private String secret; |
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} |
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@ -0,0 +1,16 @@ |
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package com.elink.esua.epdc.dto; |
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import lombok.Data; |
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import java.io.Serializable; |
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/** |
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* @Author LC |
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* @Date 2019/9/11 19:22 |
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*/ |
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@Data |
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public class UploadFormDTO implements Serializable { |
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private static final long serialVersionUID = -3595962954673866413L; |
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private String base64String; |
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} |
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