将计算机地址从本地主机更改为您的客户端希望与之连接的IP地址,以调用以下提到的服务。
客户端调用REST Web服务:
package in.india.client.downloadfiledemo;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response.Status;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientHandlerException;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.UniformInterfaceException;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.multipart.BodyPart;
import com.sun.jersey.multipart.MultiPart;
public class DownloadFileClient {
private static final String BASE_URI = "http://localhost:8080/DownloadFileDemo/services/downloadfile";
public DownloadFileClient() {
try {
Client client = Client.create();
WebResource objWebResource = client.resource(BASE_URI);
ClientResponse response = objWebResource.path("/")
.type(MediaType.TEXT_HTML).get(ClientResponse.class);
System.out.println("response : " + response);
if (response.getStatus() == Status.OK.getStatusCode()
&& response.hasEntity()) {
MultiPart objMultiPart = response.getEntity(MultiPart.class);
java.util.List<BodyPart> listBodyPart = objMultiPart
.getBodyParts();
BodyPart filenameBodyPart = listBodyPart.get(0);
BodyPart fileLengthBodyPart = listBodyPart.get(1);
BodyPart fileBodyPart = listBodyPart.get(2);
String filename = filenameBodyPart.getEntityAs(String.class);
String fileLength = fileLengthBodyPart
.getEntityAs(String.class);
File streamedFile = fileBodyPart.getEntityAs(File.class);
BufferedInputStream objBufferedInputStream = new BufferedInputStream(
new FileInputStream(streamedFile));
byte[] bytes = new byte[objBufferedInputStream.available()];
objBufferedInputStream.read(bytes);
String outFileName = "D:/"
+ filename;
System.out.println("File name is : " + filename
+ " and length is : " + fileLength);
FileOutputStream objFileOutputStream = new FileOutputStream(
outFileName);
objFileOutputStream.write(bytes);
objFileOutputStream.close();
objBufferedInputStream.close();
File receivedFile = new File(outFileName);
System.out.print("Is the file size is same? :\t");
System.out.println(Long.parseLong(fileLength) == receivedFile
.length());
}
} catch (UniformInterfaceException e) {
e.printStackTrace();
} catch (ClientHandlerException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String... args) {
new DownloadFileClient();
}
}
响应客户的服务:
package in.india.service.downloadfiledemo;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import com.sun.jersey.multipart.MultiPart;
@Path("downloadfile")
@Produces("multipart/mixed")
public class DownloadFileResource {
@GET
public Response getFile() {
java.io.File objFile = new java.io.File(
"D:/DanGilbert_2004-480p-en.mp4");
MultiPart objMultiPart = new MultiPart();
objMultiPart.type(new MediaType("multipart", "mixed"));
objMultiPart
.bodyPart(objFile.getName(), new MediaType("text", "plain"));
objMultiPart.bodyPart("" + objFile.length(), new MediaType("text",
"plain"));
objMultiPart.bodyPart(objFile, new MediaType("multipart", "mixed"));
return Response.ok(objMultiPart).build();
}
}
需要JAR:
jersey-bundle-1.14.jar
jersey-multipart-1.14.jar
mimepull.jar
WEB.XML:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>DownloadFileDemo</display-name>
<servlet>
<display-name>JAX-RS REST Servlet</display-name>
<servlet-name>JAX-RS REST Servlet</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>in.india.service.downloadfiledemo</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>JAX-RS REST Servlet</servlet-name>
<url-pattern>/services/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
java.io.File
您的服务器上是否有实际的(或文件路径),或者数据是否来自其他来源,例如数据库,Web服务,返回的方法调用InputStream
?