轉發到具有相同受管bean的相同頁面

Question

我是usnig jsf 2.1和PrimeFaces 4.0。 我有是有一個鏈接等簡單的html頁面的index.html：

<a href="pages/findus.jsf"> 

此鏈接打開的頁面findus.jsf，此頁面上我有命令按鈕：

<p:commandButton value="Find" action="#{findUsBean.onClickBtnFindUs}"> 

在onClickBtnFindUs我需要爲FindUsBean的字段設置一些值，並重定向到相同的頁面意味着findus.jsf，並且想要在findus.jsf頁面上檢索這些值。 以下是我的完整FindUsBean。

@ManagedBean(name = "findUsBean") 
@RequestScoped 
public class FindUsBean implements Serializable{ 

private static final long serialVersionUID = 1L; 

@ManagedProperty(value = "#{findUsService}") 
private FindUsService findUsService; 
private String state; 
private String city; 
private String zip; 
private String result; 

public String onClickBtnFindUs(){ 
    RestaurantLocationMaster restoLoc = new RestaurantLocationMaster(); 

    System.out.println(getState()); 

    restoLoc.setResState(getState()); 
    restoLoc.setResCity(getCity()); 
    restoLoc.setResZip(getZip()); 

    restoLoc = findRestaurantLocation(restoLoc); 
    if(null != restoLoc){ 
     setState(restoLoc.getResState()); 
     setCity(restoLoc.getResCity()); 
     setZip(restoLoc.getResZip()); 
     setResult(restoLoc.getResAddress1()+","+restoLoc.getResAddress2()); 
    }else{ 
     setResult("Comming soon..."); 
    } 

    System.out.println(getState() +""+getCity()); 
    return "/pages/findus.jsf"; 
} 

public RestaurantLocationMaster findRestaurantLocation(RestaurantLocationMaster restoLoc){ 
    RestaurantLocationMaster restoLoc1 = null; 
    restoLoc1 = findUsService.findRestaurantLocation(restoLoc); 
    return restoLoc1; 
} 

public String getState() { 
    return state; 
} 
public void setState(String state) { 
    this.state = state; 
} 
public String getCity() { 
    return city; 
} 
public void setCity(String city) { 
    this.city = city; 
} 
public String getZip() { 
    return zip; 
} 
public void setZip(String zip) { 
    this.zip = zip; 
} 
public void setFindUsService(FindUsService findUsService) { 
    this.findUsService = findUsService; 
} 
public FindUsService getFindUsService() { 
    return findUsService; 
} 

public void setResult(String result) { 
    this.result = result; 
} 

public String getResult() { 
    return result; 
} 

}

和我findus.jsf是：

<h:form prependId="false" method='POST'> 
<table> 
    <tr> 
     <td><p:outputLabel value="State"></p:outputLabel> 
     </td> 
     <td><p:inputText maxlength="20" value="#{findUsBean.state}"></p:inputText> 
     </td> 
    </tr> 
    <tr> 
     <td><p:outputLabel value="city"></p:outputLabel> 
     </td> 
     <td><p:inputText maxlength="20" value="#{findUsBean.city}"></p:inputText> 
     </td> 
    </tr> 
    <tr> 
     <td><p:outputLabel value="zip"></p:outputLabel> 
     </td> 
     <td><p:inputText maxlength="8" value="#{findUsBean.zip}"></p:inputText> 
     </td> 
    </tr> 
    <tr> 
     <td colspan="2" align="right"><p:commandButton value="Find" 
       action="#{findUsBean.onClickBtnFindUs}"> 
      </p:commandButton> 
     </td> 
    </tr> 
    <tr> 
     <td colspan="2"></td> 
    </tr> 
    <tr> 
     <td></td> 
     <td><p:inputTextarea value="#{findUsBean.result}" 
       readonly="true"></p:inputTextarea> 
     </td> 
    </tr> 
</table> 

我不能夠得到的值。如果這是錯誤的方式，那麼請給我一個適當的建議。

Answer 1

問題在於你的bean的範圍。你應該使用@ViewScope或更大的範圍。

看一看 here