基于CXF restwebservice

最新推荐文章于 2022-08-30 20:13:19 发布

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本文介绍了一个使用Apache HttpClient从RESTful Web服务下载文件到手机端的应用案例。通过客户端和服务端代码示例，展示了如何设置HTTP请求以获取并保存远程文件。

应用场景：

手机端使用apache的httpclient组件。

服务器端使用spring+cxf rest webservice

手机端代码：
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.methods.PostMethod;

public class HttpClientTest {

    private final static String REMOTE_FILE_URL = "http://localhost:8080/cxf_restful_webservice/rws/pdf/get";

    private final static int BUFFER = 1024;

    public static void main(String[] args) {

       HttpClient client = new HttpClient();
       PostMethod httpGet = new PostMethod(REMOTE_FILE_URL);
        try {
            client.executeMethod(httpGet);

            InputStream in = httpGet.getResponseBodyAsStream();
            Header[] h = httpGet.getResponseHeaders("Content-Disposition");
//            NameValuePair ss = httpGet.getParameter("Content-Disposition");
//            String name = ss.getName();
//            String value = ss.getValue();
            String dispositionValue = h[0].getValue();
            int index = dispositionValue.indexOf("=");
            String fileName = dispositionValue.substring(index+1);
            System.out.println(h[0]);
            System.out.println(fileName);
            FileOutputStream out = new FileOutputStream(new File("D:\\upload\\"+fileName));

            byte[] b = new byte[BUFFER];
            int len = 0;
            while((len=in.read(b))!= -1){
                out.write(b,0,len);
            }
            in.close();
            out.close();

        }catch (HttpException e){
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            httpGet.releaseConnection();
        }
        System.out.println("download, success!!");
       }
}

服务端代码：

import java.io.File;

import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;

@Path("/zip")
public class PdfService {

   private static final String FILE_PATH = "c:\\xxx.zip";

   @POST
   @Path("/get")
   @Produces("application/pdf")
   public Response getFile() {

       File file = new File(FILE_PATH);

       ResponseBuilder response = Response.ok((Object) file);
       response.header("Content-Disposition",
               "attachment; filename=xxx.zip");
       return response.build();

   }

}