當我使用此代碼它給出錯誤

Question

public ContactEntry createContact(String username)throws IllegalArgumentException { 
     // Create the entry to insert 
     ContactsService myService = new ContactsService("exampleCo-exampleApp-1"); 
     try { 
      myService.setUserCredentials("abc@in.gappsdemo.in", "xyz@123"); 
     } catch (AuthenticationException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } 
     String name = "neha'sContact"; 
     String notes = "this is some notes from gdata API client"; 

     ContactEntry contact = new ContactEntry(); 
     contact.setTitle(new PlainTextConstruct(name)); 
     contact.setContent(new PlainTextConstruct(notes)); 

     Email primaryMail = new Email(); 
     primaryMail.setAddress("demo@in.gappsdemo.in"); 
     primaryMail.setRel("http://schemas.google.com/g/2005#home"); 
     primaryMail.setPrimary(true); 
     contact.addEmailAddress(primaryMail); 

     Email secondaryMail = new Email(); 
     secondaryMail.setAddress("demo@in.gappsdemo.in"); 
     secondaryMail.setRel("http://schemas.google.com/g/2005#work"); 
     secondaryMail.setPrimary(false); 
     contact.addEmailAddress(secondaryMail); 

     ExtendedProperty favouriteFlower = new ExtendedProperty(); 
     favouriteFlower.setName("favourite flower"); 
     favouriteFlower.setValue("daisy"); 
     contact.addExtendedProperty(favouriteFlower); 

     ExtendedProperty sportsProperty = new ExtendedProperty(); 
     sportsProperty.setName("sports"); 
     XmlBlob sportKinds = new XmlBlob(); 
     sportKinds.setBlob(new String("<dance><salsa/><ballroom dancing/><dance/>")); 
     sportsProperty.setXmlBlob(sportKinds); 
     contact.addExtendedProperty(sportsProperty); 
     System.out.println(contact); 

     // Ask the service to insert the new entry 
     try{ 
      System.out.println("Inside try Block:"); 
      URL postUrl = new URL("https://www.google.com/m8/feeds/contacts/demo@in.gappsdemo.in/full"); 
      System.out.println("Inside try Block1:"); 
      return myService.insert(postUrl, contact); 



     } 
     catch (Exception e) { 
      // TODO: handle exception 
      e.printStackTrace(); 
     } 
     return contact; 
    } 

當我使用此代碼它提供了以下錯誤： [錯誤] [simplerpc] - 第9行：沒有源代碼可用的類型com.google.gdata .data.contacts.ContactEntry;你忘了繼承一個必需的模塊嗎？

Answer 1

您不能直接在GWT中使用服務器端代碼。 由於GWT將無法爲com.google.gdata.data.contacts.ContactEntry生成JavaScript，因此會出現上述錯誤。