弹出异常对话框alert('error')-struts

2012-11-04

弹出错误对话框alert(error)--struts唉！很累！就把代码贴出来！希望对初学者有所帮助!? 简要说明：addError

弹出错误对话框alert('error')--struts

唉！很累！就把代码贴出来！希望对初学者有所帮助!?

简要说明：addError方法用于添加要弹出的消息或错误！

??????????????????? addMsg方法用于添加消息或错误！

Java代码

package?com.dotease.common; ?? ??
import?javax.servlet.http.HttpServletRequest; ?? ??
import?org.apache.struts.Globals; ?? import?org.apache.struts.action.ActionErrors; ??
import?org.apache.struts.action.ActionMessage; ?? import?org.apache.struts.action.Action; ??
import?org.apache.struts.action.ActionMessages; ?? import?org.apache.struts.util.MessageResources; ??
import?java.util.ArrayList; ?? /** ?
?*?@author?Administrato?2007-10-9 ? ?*2007-10-9 ?
?*/?? public?class?Msg?{ ??
?? ????/** ?
?????*?save?the?error?messages!?This?like?Action.saveErrors();? ? ?????*?@param?request ?
?????*?@param?errors ? ?????*/??
????protected??static?final?void?saveErrors(HttpServletRequest?request,ActionMessages?errors)?{ ?? ??
????????if?((errors?==?null)?||?errors.isEmpty())?{ ?? ????????????request.removeAttribute(Globals.ERROR_KEY); ??
????????????return; ?? ????????} ??
????????//?Save?the?error?messages?we?need ?? ????????request.setAttribute(Globals.ERROR_KEY,?errors); ??
???????? ?? ????} ??
???? ?? ????/** ?
?????*?保存弹出消息到Request,使用默认的key:showError? ? ?????*?此信息在前台设置后，弹出! ?
?????*?建议: 放在紧挨着的地方！ ? ?????*?适合有错误，就返回！?如果多次调用，会覆盖上次的Errors ?
?????*?@param?request?? ? ?????*?@param?ActionMessage???? ?
?????*? ? ?????*/??
public?static?final?void?saveError(HttpServletRequest?request,ActionMessage?error)?{ ?? ???????? ??
????????MessageResources?msgResource?=?((MessageResources)?request.getAttribute(Globals.MESSAGES_KEY)); ?? ????????String?msg=msgResource.getMessage(error.getKey()); ??
????????int?length=0; ?? ????????if(error.getValues()!=null) ??
????????????length=error.getValues().length; ?? ????????for(int?i=0;i
????????{ ?? ????????????msg=msg.replace("{"+i+"}",?error.getValues()[i].toString()); ??
???????????? ?? ????????} ??
????????ActionMessages?errors?=?new?ActionMessages(); ?? ????????errors.add("showError",new?ActionMessage("showError",msg)); ??
????????saveErrors(request,errors);? ?? ????} ??
?? ????/** ?
?????*?把ActionMessage对象转化为文本字符串 ? ?????*?@param?request ?
?????*?@param?msg ? ?????*?@return ?
?????*/?? public?static?final?String?msgToString(HttpServletRequest?request,ActionMessage?error)? ??
{ ?? ????MessageResources?msgResource?=?((MessageResources)?request.getAttribute(Globals.MESSAGES_KEY)); ??
????String?msg=msgResource.getMessage(error.getKey()); ?? ????msg=filterString(msg); ??
????int?length=0; ?? ????if(error.getValues()!=null) ??
????????length=error.getValues().length; ?? ????for(int?i=0;i
????{ ?? ????????msg=msg.replace("{"+i+"}",?error.getValues()[i].toString()); ??
???????? ?? ????} ??
????return?msg; ?? } ??
????/** ? ?????*?返回MessageResources对象，通过它可以获得配置资源 ?
?????*?@param?request ? ?????*?@return ?
?????*/?? public?static?final?MessageResources?getMsgResources(HttpServletRequest?request)? ??
{??? ?? ????return?((MessageResources)?request.getAttribute(Globals.MESSAGES_KEY));? ??
} ?? ??
?? ??
protected?static?final?ActionMessages?getErrors(HttpServletRequest?request) ?? { ??
????ActionMessages?errors?=?(ActionMessages)request.getAttribute(Globals.ERROR_KEY); ?? ????if(errors?==?null) ??
????????errors?=?new?ActionMessages(); ?? ????return?errors; ??
???? ?? } ??
????/** ? ?????*?保存弹出消息到Request,使用默认的key:showError? ?
?????*?@param?request ? ?????*?@param?error ?
?????*/?? public?static?final?void?addError(HttpServletRequest?request,ActionMessage?error) ??
{ ?? ????ActionMessages?errors=getErrors(request); ??
????errors.add("showError",?new?ActionMessage("showError",msgToString(request,error))); ?? ????saveErrors(request,errors); ??
} ?? ????/** ?
?????*?保存弹出消息到Request,使用默认的key:showError? ? ?????*?@param?request ?
?????*?@param?key ? ?????*/??
public?static?final?void?addError(HttpServletRequest?request,String?key) ?? { ??
????ActionMessages?errors=getErrors(request); ?? ????String?temp=key; ??
????temp=getMsgResources(request).getMessage(key); ?? ????if(temp!=null) ??
????????key=temp; ?? ????errors.add("showError",?new?ActionMessage("showError",key)); ??
????saveErrors(request,errors); ?? } ??
public?static?final?void?addMsg(HttpServletRequest?request,String?key,ActionMessage?error) ?? { ??
????ActionMessages?errors=getErrors(request); ?? ????errors.add(key,?error); ??
????saveErrors(request,errors); ?? } ??
public?static?final?void?addMsg(HttpServletRequest?request,String?key,String??value) ?? { ??
????ActionMessages?errors=getErrors(request); ?? ????errors.add(key,?new?ActionMessage("showMsg",value)); ??
????saveErrors(request,errors); ?? } ??
public?static?final?String?filterString(String?s) ?? { ??
????if(s.indexOf("<")==-1) ?? ????????return?s; ??
????int?len=s.length(); ?? ????int?ps=s.indexOf("<"); ??
????int?pe=s.indexOf(">"); ?? ????s=s.substring(0,?ps)+s.substring(pe+1,s.length()); ??
????return?filterString(s);? ?? } ??
//error.DBError??? 数据库错误提示public?static?final?void?addError(HttpServletRequest?request,Exception?e) ??
{ ?? ????ActionMessages?errors=getErrors(request); ??
????String?temp=getMsgResources(request).getMessage("error.DBError"); //数据库错误提示?? ????errors.add("showError",?new?ActionMessage("showError",temp+e.getMessage())); ??
????saveErrors(request,errors); ?? ????e.printStackTrace(); ??
}??

????????????? showError= <script language="JavaScript">alert('{0}')</script>

??? 3.使用示例:

? ?????? Msg.addError(request, "你还没有办理公司××业务！");

???????? Msg.saveError(request, new ActionMessage("mccc.failmsg"));

???????? Msg.addError(request, new ActionMessage("mccc.lessmczh"));

?????? ? 显示所有的:? <html:errors/>

????????

???????? 显示指定的错误！

<html:errors property="showError"/>

??? 太累！没有详细注释，说明！见谅！?

1 楼 little fish 2008-05-14 这个太难，太复杂了，我就是想知道在jsp页面中要删除一条记录的时候怎么弹出对话框，应该不用写的这么复杂吧 2 楼 xiao_xgy 2008-09-25 高手啊,javaEye怎么会有这么多高手! 3 楼 wangjian3q 2008-11-02 为什么是乱码呀！
请求帮助。 4 楼 anny5 2008-11-24 谢了谢了谢了谢了

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