service層編寫商業邏輯總會有很多的返回信息,那么如何合理的和struts/webwork結合起來呢，我參考了spring論壇上的一個做法如下：
1
/** *//**
2
*
3
*/
4
package it.linksystem.csai.web.util;
5
6import java.util.Iterator;
7
8import it.linksystem.csai.client.delegate.UserBusinessDelegate;
9import it.linksystem.csai.common.Error;
10import it.linksystem.csai.common.Warning;
11import it.linksystem.csai.common.dto.UserDTO;
12
13import javax.servlet.http.HttpServletRequest;
14
15import org.apache.struts.action.ActionMessage;
16import org.apache.struts.action.ActionMessages;
17
18import net.sf.acegisecurity.Authentication;
19import net.sf.acegisecurity.AuthenticationException;
20import net.sf.acegisecurity.providers.UsernamePasswordAuthenticationToken;
21import net.sf.acegisecurity.ui.AbstractProcessingFilter;
22
23/** *//**
24 * @author Srepfler Srgjan
25 *
26 */
27public class LoginProcessingFilter extends AbstractProcessingFilter 
{
28
29
/**//* (non-Javadoc)
30 * @see net.sf.acegisecurity.ui.AbstractProcessingFilter#getDefaultFilterProcessesUrl()
31
*/
32 public String getDefaultFilterProcessesUrl() {
33 return "/LoginSubmit.do";
34 }
35
36 /**//* (non-Javadoc)
37 * @see net.sf.acegisecurity.ui.AbstractProcessingFilter#attemptAuthentication(javax.servlet.http.HttpServletRequest)
38 */
39 public Authentication attemptAuthentication(HttpServletRequest request)
40 throws AuthenticationException {
41 ActionMessages errors = new ActionMessages();
42 ActionMessages warnings = new ActionMessages();
43
44 UserBusinessDelegate ubd = new UserBusinessDelegate();
45 String username = request.getParameter("j_username");
46 String password = request.getParameter("j_password");
47 if(username == null){
48 username ="";
49 }
50 if(password == null){
51 password="";
52 }
53 UserDTO userDTO = new UserDTO();
54 userDTO.setUsername(username);
55 userDTO.setPassword(password);
56 UserDTO resultDTO = ubd.login(userDTO.getUsername(),userDTO.getPassword());
57
58 if(resultDTO.isError()){
59 for (Iterator theiterator = resultDTO.errorsIterator(); theiterator.hasNext();) {
60 Error theerror = (Error) theiterator.next();
61 errors.add(theerror.getCode(),new ActionMessage(theerror.getCode()));
62 }
63 } else {
64 if(resultDTO.isWarning()){
65 for (Iterator theiterator = resultDTO.warningsIterator(); theiterator.hasNext();) {
66 Warning thewarning = (Warning) theiterator.next();
67 warnings.add(thewarning.getCode(),new ActionMessage(thewarning.getCode()));
68 }
69 }
70 request.getSession().setAttribute(Constants.USER_KEY,resultDTO);
71 logger.info("Login dell utente: "+resultDTO.getUsername());
72 }
73
74 UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username,password);
75 authRequest.setDetails(request.getRemoteAddr());
76 return this.getAuthenticationManager().authenticate(authRequest);
77 }
78
79}
80 DTO撤掉，然后并到service層的BaseService中,做個接口用來記錄error message,然后Baseservice的實現中提供Errors message add和Iterator,以及iserror,iswarning,然后其他service調用其方法,至于view層調用則跟上述類似。
posted on 2005-09-28 22:30
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