【发布时间】：2026-01-31 09:10:01
【问题描述】：
My XHTML:-->
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"`enter code here`
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui"
template="/templates/mainTemplatePage.xhtml">
<ui:define name="content">
<h:form id="addProduct">
<f:loadBundlebasename="com.erudishield.framework.propertyfile.
ScreenConstants"
var="constants" />
<f:loadBundle
basename="com.erudishield.framework.propertyfile.ScreenButtonNameConstants"
var="buttonConstant" />
<p:panel id="addProductPanel">
<h:panelGrid columns="3">
<h:outputLabel value="Add Product" />
<!-- <h:outputLabel
value="#
{addProductBB.screenDisplayData.message.screenResponseMessageForAddProduct}"
rendered="#
{addProductBB.renderer.productDataRenderer.productTextRenderer}"
style="#
{productMaintenanceBB.screenDisplayData.message.screenResponseMessageColor}"
styleClass="outputText" escape="false">
</h:outputLabel>
-->
</h:panelGrid>
<h:panelGrid columns="2" cellpadding="5">
<h:outputText id="outputText" value="#
{constant.screenDisplayData.productName}"></h:outputText>
<p:inputText id="addProductInput"
value="#{addProductBB.screenDisplayData.productName}">
</p:inputText>
</h:panelGrid>
<p:spacer width="415" height="20" />
<h:panelGrid>
<p:commandButton value="#{buttonConstant.addProduct}"
update=":addProduct" action="#
{addProductBB.addProductAction}"> </p:commandButton>
</h:panelGrid>
</p:panel>
</h:form>
</ui:define>
</ui:composition>
-------------------------------------------
Managed Bean:
package com.erudishield.erudishieldweb.bb.businessProcess;
import java.io.Serializable;
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import com.erudishield.erudishieldutil.validator.StringValidator;
import com.erudishield.erudishieldweb.bb.businessProcess.bo.
AddProductScreenDisplayData;
import com.erudishield.erudishieldweb.bd.AddProductBD;
import com.erudishield.erudishieldweb.bo.businessProcess.ProductRenderer;
import com.erudishield.framework.application.constants.ApplicationConstants;
import com.erudishield.framework.messages.MessageConstants;
import com.erudishield.service.businessprocess.bo.AddProductBO;
import com.erudishield.service.businessprocess.bo.AddProductPKBO;
import com.erudishield.service.businessprocess.bo.
AddProductScreenResponseMessageBO;
import com.erudishield.service.businessprocess.bo.ProductBO;
import com.erudishield.service.businessprocess.bo.ProductPKBO;
@ManagedBean
@ViewScoped
public class AddProductBB implements Serializable {
private static final long serialVersionUID = -1089990299636039243L;
private AddProductScreenDisplayData screenDisplayData;
private ProductRenderer renderer;
private String addProductName;
private AddProductScreenResponseMessageBO message;
public AddProductScreenDisplayData getScreenDisplayData() {
return screenDisplayData;
}
public void setScreenDisplayData(
AddProductScreenDisplayData screenDisplayData) {
this.screenDisplayData = screenDisplayData;
}
public ProductRenderer getRenderer() {
return renderer;
}
public void setRenderer(ProductRenderer renderer) {
this.renderer = renderer;
}
@PostConstruct
public void init() {
AddProductScreenDisplayData screenDisplayData = new
AddProductScreenDisplayData();
setScreenDisplayData(screenDisplayData);
ProductRenderer renderer = new ProductRenderer();
setRenderer(renderer);
}
public void addProductAction() {
System.out.println("Entering in method addProductAction");
/* initializeAllScreenMesages();
getMessage().setScreenResponseMessageForAddProduct("");
*/
if (productDataValidation()) {
getScreenDisplayData().getMessage().setScreenResponseMessageColor
(ApplicationConstants.ERROR_MESSAGE_COLOR);
}
else {
AddProductBO addProductBO = convertScreenDataToAddProductBO();
AddProductBO productBO = new AddProductBD().addProduct(
addProductBO, getMessage());
if (productBO.getId() == 0) {
commonScreenMessageRendering(
ApplicationConstants.ERROR_MESSAGE_COLOR,
getScreenDisplayData().getMessage()
.getScreenResponseMessageForAddProduct(),"Add");
} else {
commonScreenMessageRendering(
ApplicationConstants.SUCCESS_MESSAGE_COLOR,
MessageConstants.SUCCESS_PRODUCT_CREATED,"Add");
}
}
}
/*
* public void commonMessageRendering(String message, String messageColor) {
* getScreenDisplayData().getMessage().setScreenResponseMessageColor(
* messageColor); getScreenDisplayData().getMessage()
* .setScreenResponseMessageForAddProduct(message);
*
* }
*/
public void commonScreenMessageRendering(String message,
String messageColor, String action) {
if (action.equals("Add")) {
getScreenDisplayData().getMessage()
.setScreenResponseMessageForAddProduct(message);
}
getScreenDisplayData().getMessage().setScreenResponseMessageColor(
messageColor);
}
public void initializeAllScreenMesages() {
getScreenDisplayData().setMessage(
new AddProductScreenResponseMessageBO());
}
public AddProductBO convertScreenDataToAddProductBO() {
AddProductBO addProductBO = new AddProductBO();
addProductBO.setProductName(getAddProductName());
return addProductBO;
}
public boolean productDataValidation() {
boolean isError = false;
if (StringValidator.isBlankOrNull(getScreenDisplayData().
getProductName())) {
//getScreenDisplayData().setProductName("");
getScreenDisplayData().getMessage()
.addScreenResponseMessageForAddProductPanel(
MessageConstants.ERROR_PRODUCT_NAME_REQUIRED);
isError = true;
} else if (getAddProductName().length() >= 100) {
//setAddProductName("");
getScreenDisplayData().getMessage()
.addScreenResponseMessageForAddProductPanel(
MessageConstants.ERROR_LENTHIER_PRODUCT_NAME);
isError = true;
}
return isError;
}
public String getAddProductName() {
return addProductName;
}
public void setAddProductName(String addProductName) {
this.addProductName = addProductName;
}
public AddProductScreenResponseMessageBO getMessage() {
return message;
}
public void setMessage(AddProductScreenResponseMessageBO message) {
this.message = message;
}
}
-------------------------------------------------------
AddProductScreenDisplayData class
package com.erudishield.erudishieldweb.bb.businessProcess.bo;
import java.io.Serializable;
import java.util.List;
import com.erudishield.service.businessprocess.bo.
AddProductScreenResponseMessageBO;
public class AddProductScreenDisplayData implements Serializable {
/**
*
*/
private static final long serialVersionUID = 8033274203833911923L;
private String productName;
private AddProductScreenResponseMessageBO message;
private String testScreenDisplay;
// private List<Object> productList;
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public AddProductScreenResponseMessageBO getMessage() {
return message;
}
public void setMessage(AddProductScreenResponseMessageBO message) {
this.message = message;
}
public String getTestScreenDisplay() {
return testScreenDisplay;
}
public void setTestScreenDisplay(String testScreenDisplay) {
this.testScreenDisplay = testScreenDisplay;
}
}
================================================ ========== 我的问题是，当我从用户产品名称中获取输入并将其设置为 AddProductScreenDisplayData 对象中的变量 productName 时，它设置为 null（似乎设置为 null）。和代码中断。我放了 System.out.println() 语句来确保它是否进入了 addProductAction() 方法。流程正在进入该方法，但是当检查的验证很少时，代码流程再次中断。但是，如果我在托管 bean 本身中设置产品名称，而不是在 AddProductScreenDisplayData 中设置，那么一切正常。请帮帮我。问题出在哪里
【问题讨论】：
-
请更正您的代码布局。把它分成多个块。这种方式不可读
-
感谢投票而不是任何解决方案。我已经解决了这个问题。
-
不客气。而且，如果您阅读了一些有关否决的元帖子，您会发现像您一样抱怨而不是对我昨天所做的评论做任何事情，您将来获得帮助的机会肯定不会增加。祝你好运
-
哦，下次如果您发布代码，还请阅读 jsf 信息页面中的 mcve 和 How to Ask