使用java语言编写的demo:上传文件至百度网盘(baidu pcs)

mac2022-06-30 25

为什么会有这个Demo? 原因大致两点：

1. 官方提供Android PCS SDK，但有些移动应用开发者可能仅仅使用一小部分Baidu PCS的能力，希望不链接SDK，而自己实现功能以减少应用的尺寸。

2. 使用Java做server端的开发者，显然不能使用Android PCS SDK。

技术文档：

PCS官方API说明

使用方法：

1. 下载这份PCSUploadDemo.java的代码。

2. 编译它。

（1）这里用到Apache Http的Java库，所以先下载它：http://hc.apache.org/downloads.cgi 。把那些jar库文件准备好。

（2）编译，需要设定CLASSPATH:

oliverluan@YanqiangtekiMacBook-Pro:~/Documents/EvWork/PCSUploadDemo$ javac -cp "httpcore-4.3.2.jar:httpclient-4.3.3.jar:httpmime-4.3.3.jar:./" PCSUploadDemo.java

　　3. 运行:

oliverluan@localhost:~/Documents/EvWork/PCSUploadDemo$ java -cp "httpcore-4.3.2.jar:httpclient-4.3.3.jar:httpmime-4.3.3.jar:./:commons-logging-1.1.3.jar" PCSUploadDemo Usage: PCSUploadDemo file_to_upload destination your_access_token

　　源代码：PCSUploadDemo.java

import java.io.File; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.net.*; import java.util.ArrayList; import java.util.List; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.ParseException; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.params.HttpClientParams; import org.apache.http.entity.mime.MultipartEntity; import org.apache.http.entity.mime.content.ByteArrayBody; import org.apache.http.entity.mime.content.ContentBody; import org.apache.http.entity.mime.content.FileBody; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.protocol.HTTP; import org.apache.http.util.EntityUtils; public class PCSUploadDemo { //post请求地址 private final static String API = "https://pcs.baidu.com/rest/2.0/pcs/file"; //本地文件路径, 例如:"/Users/macuser/Documents/workspace/test.jpg" private static String mLocalPath; //上传文件路径（含上传的文件名称), 例如:"/apps/yuantest/test.jpg" private static String mDestPath; //开发者准入标识 access_token, 通过OAuth获得 private static String mAccessToken; public static void main(String[] args) { if (args.length != 3) { System.out.println("Usage: PCSUploadDemo file_to_upload destination your_access_token"); return; } mLocalPath = args[0]; mDestPath = args[1]; mAccessToken = args[2]; File fileToUpload = new File(mLocalPath); if (!(fileToUpload).isFile()) { System.out.println("Input file_to_upload is invalid!"); return; } System.out.println("Uploading..."); Thread workerThread = new Thread(new Runnable() { public void run() { try { doUpload(); } catch (IOException e) { e.printStackTrace(); } } }); workerThread.start(); return ; } public static void doUpload() throws IOException{ File fileToUpload = new File(mLocalPath); if(null != fileToUpload && fileToUpload.length() > 0){ ArrayList<NameValuePair> params = new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("method", "upload")); params.add(new BasicNameValuePair("access_token", mAccessToken)); params.add(new BasicNameValuePair("path", mDestPath)); //添加请求参数，通过POST表单进行传递，除上传文件内容之外的其它参数通过query_string进行传递。 String postUrl = API + "?" + buildParams(params); HttpPost post = new HttpPost(postUrl); //添加文件内容，必须使用multipart/form-data编码的HTTP entity MultipartEntity entity = new MultipartEntity(); FileBody fo = new FileBody(fileToUpload); entity.addPart("uploaded",fo); post.setEntity(entity); //创建client HttpClient client = new DefaultHttpClient(); //发送请求 HttpResponse response = client.execute(post); System.out.println(response.getStatusLine().toString()); System.out.println(EntityUtils.toString(response.getEntity())); } } // url encoded query string protected static String buildParams(List<NameValuePair> urlParams){ String ret = null; if(null != urlParams && urlParams.size() > 0){ try { // 指定HTTP.UTF_8为charset参数以保证中文文件路径的正确 HttpEntity paramsEntity = new UrlEncodedFormEntity(urlParams, HTTP.UTF_8); ret = EntityUtils.toString(paramsEntity); } catch (UnsupportedEncodingException e1) { e1.printStackTrace(); } catch (ParseException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } return ret; } }

作者：neokidd 原文链接：http://blog.csdn.net/u011581005/article/details/23197259

转载于:https://www.cnblogs.com/lightapp/p/pcs.html

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