Struts1.3 ActionMessages、ActionMessage、ActionErrors、ActionError使用

1. 在ActionForm中使用:

LoginForm.java

public class LoginForm extends ActionForm{                 private String name;                 private String password;                 /*setter and getter*/                                 /*validate*/                 public ActionErrors validate(ActionMapping mapping, HttpServletRequest request){                                 ActionMessages errors = new ActionMessages();                                 if(this.name == null || this.name.length() < 1){                                                 ActionMessage aError = new ActionMessage("error.required");                                                 errors.add("userName", aError);                                 }                                 return errors;                 } }

 

 

 

2. 在Action中使用：

LoginAction.java

public class LoginAction extends Action{                 public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response){                                 LoginForm loginForm = (LoginForm)form;                                 String name = loginForm.getName();                                                                 if("camper".equals(name)){                                   ActionMessage errors = new ActionMessages();                                                 ActionMessage aerror = new ActionError("error.invalid.userName");                                                 errors.add(aerror);                                                 this.addError(errors);                                                 return mapping.getInputForward();                                 }                                 return mapping.findMapping("result");                 }              }