java 實現微信服務器下載圖片到自己服務器
此功能的實現需要注意java 中IO流的操作及網路開發，
實現代碼：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/** * @author why * */public class PicDownload { /** * * 根據文件id下載文件 * * * * @param mediaId * * 媒體id * * @throws Exception */ public static InputStream getInputStream(String accessToken, String mediaId) { InputStream is = null; String url = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=" + accessToken + "&media_id=" + mediaId; try { URL urlGet = new URL(url); HttpURLConnection http = (HttpURLConnection) urlGet .openConnection(); http.setRequestMethod("GET"); // 必須是get方式請求 http.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); http.setDoOutput(true); http.setDoInput(true); System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 連接超時30秒 System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 讀取超時30秒 http.connect(); // 獲取文件轉化為byte流 is = http.getInputStream(); } catch (Exception e) { e.printStackTrace(); } return is; } /** * * 獲取下載圖片信息（jpg） * * * * @param mediaId * * 文件的id * * @throws Exception */ public static void saveImageToDisk(String accessToken, String mediaId, String picName, String picPath) throws Exception { InputStream inputStream = getInputStream(accessToken, mediaId); byte[] data = new byte[10240]; int len = 0; FileOutputStream fileOutputStream = null; try { fileOutputStream = new FileOutputStream(picPath+picName+".jpg"); while ((len = inputStream.read(data)) != -1) { fileOutputStream.write(data, 0, len); } } catch (IOException e) { e.printStackTrace(); } finally { if (inputStream != null) { try { inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } if (fileOutputStream != null) { try { fileOutputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } } /** * 圖片下載 * * @param accessToken * @param mediaId */ public static void getPic(String accessToken, String mediaId) { String requestUrl = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=ACCESS_TOKEN&media_id=MEDIA_ID"; requestUrl = requestUrl.replace("ACCESS_TOKEN", accessToken).replace( "MEDIA_ID", mediaId); JSONObject jsonObject = WeixinUtil.httpRequest(requestUrl, "GET", null); System.out.println(jsonObject); } public static void main(String[] args) throws Exception { String accessToken = ""; String mediaId = ""; String picName = ""; saveImageToDisk(accessToken, mediaId, picName,"f:/"); } } |
感謝閱讀，希望能幫助到大家，謝謝大家對本站的支持！
原文鏈接：http://blog.csdn.net/u011072139/article/details/47108761
