/**
* 文件上传到微信服务器
* @param fileType 文件类型
* @param filePath 文件路径
* @return JSONObject
* @throws Exception
*/
public
static
JSONObject send(String fileType, String filePath)
throws
Exception {
String result =
null
;
File file =
new
File(filePath);
if
(!file.exists() || !file.isFile()) {
throw
new
IOException(
"文件不存在"
);
}
/**
* 第一部分
*/
URL urlObj =
new
URL(
"http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token="
+ getAccess_token() +
"&type="
+fileType+
""
);
HttpURLConnection con = (HttpURLConnection) urlObj.openConnection();
con.setRequestMethod(
"POST"
);
// 以Post方式提交表单,默认get方式
con.setDoInput(
true
);
con.setDoOutput(
true
);
con.setUseCaches(
false
);
// post方式不能使用缓存
// 设置请求头信息
con.setRequestProperty(
"Connection"
,
"Keep-Alive"
);
con.setRequestProperty(
"Charset"
,
"UTF-8"
);
// 设置边界
String BOUNDARY =
"----------"
+ System.currentTimeMillis();
con.setRequestProperty(
"Content-Type"
,
"multipart/form-data; boundary="
+ BOUNDARY);
// 请求正文信息
// 第一部分:
StringBuilder sb =
new
StringBuilder();
sb.append(
"--"
);
// 必须多两道线
sb.append(BOUNDARY);
sb.append(
"\r\n"
);
sb.append(
"Content-Disposition: form-data;name=\"file\";filename=\""
+ file.getName() +
"\"\r\n"
);
sb.append(
"Content-Type:application/octet-stream\r\n\r\n"
);
byte
[] head = sb.toString().getBytes(
"utf-8"
);
// 获得输出流
OutputStream out =
new
DataOutputStream(con.getOutputStream());
// 输出表头
out.write(head);
// 文件正文部分
// 把文件已流文件的方式 推入到url中
DataInputStream in =
new
DataInputStream(
new
FileInputStream(file));
int
bytes =
0
;
byte
[] bufferOut =
new
byte
[
1024
];
while
((bytes = in.read(bufferOut)) != -
1
) {
out.write(bufferOut,
0
, bytes);
}
in.close();
// 结尾部分
byte
[] foot = (
"\r\n--"
+ BOUNDARY +
"--\r\n"
).getBytes(
"utf-8"
);
// 定义最后数据分隔线
out.write(foot);
out.flush();
out.close();
StringBuffer buffer =
new
StringBuffer();
BufferedReader reader =
null
;
try
{
// 定义BufferedReader输入流来读取URL的响应
reader =
new
BufferedReader(
new
InputStreamReader(con.getInputStream()));
String line =
null
;
while
((line = reader.readLine()) !=
null
) {
//System.out.println(line);
buffer.append(line);
}
if
(result==
null
){
result = buffer.toString();
}
}
catch
(IOException e) {
System.out.println(
"发送POST请求出现异常!"
+ e);
e.printStackTrace();
throw
new
IOException(
"数据读取异常"
);
}
finally
{
if
(reader!=
null
){
reader.close();
}
}
JSONObject jsonObj =
new
JSONObject(result);
return
jsonObj;
}