Question

我已经包含了所有jar文件。这个小程序实际上只在localhost中调用一个restful web服务。当我刚刚运行JarExampleApplet.java作为＆＃34; run-as applet＆＃34;时，它运行正常。但是当我在浏览器中运行它时它是给我一个运行时错误＆＃34; java.lang.NoClassDefFoundError：com.sun.jersey.api.client.config.ClientConfig＆＃34;

import java.applet.Applet;
import java.awt.Graphics;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import javax.ws.rs.core.MediaType;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;
import com.sun.jersey.api.client.filter.LoggingFilter;
import com.sun.jersey.core.util.Base64;

    @SuppressWarnings("serial")  
    public class JarExampleApplet extends Applet {

        public static final String BASE_URI = "http://localhost:8080/RESTfulWS";
        public static final String PATH_NAME = "/file/upload_json/";

        public void init ()
        {
            JarExampleApplet my_client = new JarExampleApplet();
            File file_upload = new File("C:/Grails.pdf");
            try{

            my_client.sendFileJSON(file_upload);
            }
            catch(Exception ex)
            {
             System.out.println("Exception : " + ex);
            }   
        }

        public void paint(Graphics g) {
            g.drawString("This Applet was read from a .jar file.", 0, 25);
        }

        public void sendFileJSON(File file_upload) throws JSONException, IOException{

            ClientConfig config = new DefaultClientConfig();
            Client client = Client.create(config);
            client.addFilter(new LoggingFilter());

            WebResource resource = client.resource(BASE_URI);
            WebResource service = resource.path("rest").path(PATH_NAME);
            JSONObject data_file = new JSONObject();
            data_file.put("file_name", file_upload.getName());
            data_file.put("file", convertFileToString(file_upload));

            ClientResponse client_response = service.accept(MediaType.APPLICATION_JSON).post(ClientResponse.class, data_file);
            System.out.println(" "+client_response);
            System.out.println("Status: "+client_response.getStatus());

            client.destroy();

        }


        //Convert my file to a Base64 String
        private String convertFileToString(File file) throws IOException{
            byte[] bytes = Files.readAllBytes(file.toPath());   
            return new String(Base64.encode(bytes));
        }
    }

//////////////////////// HTML文件

<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<applet code="JarExampleApplet.class" archive="JarExampleApplet.jar" height="200" width="400"></applet>
</body>
</html>

Answer 1

可能是你错过了jersey-client.jar。

Download Link

在浏览器上运行applet时会出现运行时错误： - ＆＃34; java.lang.NoClassDefFoundError：com.sun.jersey.api.client.config.ClientConfig＆＃34;

1 个答案: