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最近更新时间：2023-01-12 11:52:17
以下代码为表单上传Object示例代码：
/***
* 下面是以数据流的形式上传，代码较直观，当然可以另行实现
**/
public void postObject() {
final File file = new File("<filePath>");
String key = "tttt";
Map<String,String> postData = new HashMap<String,String>();
postData.put("acl","public-read");
postData.put("key", key);
List<String> unknowValueField = new ArrayList<String>();
unknowValueField.add("name");
// 计算policy、signature 下面会用到
PostObjectFormFields fields = client.getObjectFormFields("<bucketName>",file.getName(),postData,unknowValueField);
System.out.println("*********** signature: " + signature);
String uploadUrl = "http://" + "<endPoint>" + "/" + "<bucketName>";
String end = "\r\n";
String twoHyphens = "--";
String boundary = "******";
try {
URL url = new URL(uploadUrl);
HttpURLConnection httpURLConnection = (HttpURLConnection) url
.openConnection();
httpURLConnection.setDoInput(true);
httpURLConnection.setDoOutput(true);
httpURLConnection.setUseCaches(false);
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setRequestProperty("Connection", "Keep-Alive");
httpURLConnection.setRequestProperty("Charset", "UTF-8");
httpURLConnection.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
DataOutputStream dos = new DataOutputStream(httpURLConnection.getOutputStream());
// 写入key
dos.writeBytes(twoHyphens + boundary + end);
dos.writeBytes("Content-Disposition: form-data; name=\"key\"" + end);
dos.writeBytes(end);
dos.writeBytes(key);
dos.writeBytes(end);
// 写入kssAccessId
dos.writeBytes(twoHyphens + boundary + end);
dos.writeBytes("Content-Disposition: form-data; name=\"KSSAccessKeyId\"" + end);
dos.writeBytes(end);
dos.writeBytes(fields.getKssAccessKeyId());
dos.writeBytes(end);
// 写入policy
dos.writeBytes(twoHyphens + boundary + end);
dos.writeBytes("Content-Disposition: form-data; name=\"Policy\"" + end);
dos.writeBytes(end);
dos.writeBytes(fields.getPolicy());
dos.writeBytes(end);
// 写入signature
dos.writeBytes(twoHyphens + boundary + end);
dos.writeBytes("Content-Disposition: form-data; name=\"Signature\"" + end);
dos.writeBytes(end);
dos.writeBytes(fields.getSignature());
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + end);
dos.writeBytes("Content-Disposition: form-data; name=\"file\"; filename=\""
+ file.getName()
+ "\"" + end);
dos.writeBytes(end);
//将SD 文件通过输入流读到Java代码中
FileInputStream fis = new FileInputStream(file);
byte[] buffer = new byte[8192]; // 8k
int count = 0;
while ((count = fis.read(buffer)) != -1) {
dos.write(buffer, 0, count);
}
fis.close();
System.out.println("file send to server............");
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + twoHyphens + end);
dos.flush();
//读取服务器返回结果
int code = httpURLConnection.getResponseCode();
System.out.println("response code： " + code);
InputStream is = null;
if (code == 200) {
is = httpURLConnection.getInputStream();
} else {
is = httpURLConnection.getErrorStream();
}
InputStreamReader isr = new InputStreamReader(is, "utf-8");
BufferedReader br = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
String result;
while ((result = br.readLine()) != null) {
sb.append(result);
}
System.out.println(sb.toString());
is.close();
dos.close();
} catch (Exception e) {
e.printStackTrace();
System.out.println(e.getMessage());
}
}
注：
如果bucket空间权限为公开读写，那么只需要传key、file两个参数，且两个参数的顺序不能乱。
如果bucket空间权限为私密，这个时候需要传以下字段，详见文档说明
| 名称 | 说明 | 是否必须 |
|---|---|---|
| key | objectKey | 是 |
| KSSAccessKeyId | ak，此处必须大写，其他的键名大小写没有要求 | 是 |
| policy | 安全策略，经过Base64之后的值，可通过PostObjectFormFields实例获取 | 是 |
| signature | 根据sk和policy计算的签名信息，可通过PostObjectFormFields实例获取 | 是 |
| file | 文件或文本内容 | 是 |
这些字段的顺序必须按照key首位、file尾部，中间的几个随意的规则，否则会报错AccessDenied。另外，如果想查看示例源码，请点击查看。
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