使用相同的辅助bean将数据从page1传递到page2的最佳方法是什么？
[英]What is the best way to pass data from page1 to page2 using the same backing bean?
问题描述
I'm creating a simple search form on page1 and on page2 i will be showing the results. 
我正在第1页和第2页创建一个简单的搜索表单，我将显示结果。
I'm wondering what the best way to do that with a @ViewScoped backing bean. 我想知道使用@ViewScoped支持bean的最佳方法是什么。 Previously i've had to use @SessionScope to achieve this. 以前我必须使用@SessionScope来实现这一目标。
Page1 - search page: 第1页 - 搜索页面：
<h:form id="documents">
<h4 class="dkblue u-case">Documents Search</h4>
<h:outputLabel for="mainNum" value="mainNumber" />
<p:inputText id="mainNum" value="#{documentBacking.document.mainNumber}"/>
<h:outputLabel for="secNum" value="secNumber" />
<p:inputText id="secNum" value="#{documentBacking.document.secNumber}"/>
<h:outputLabel for="formType" value="Form Type" />
<p:inputText id="formType" value="#{documentBacking.document.formType}"/>
<p:commandButton value="Search" action="#{documentBacking.search}" />
<p:commandButton id="clear" value="Clear" type="reset"/>
</h:form>
Page2 - results page: 第2页 - 结果页面：
<p:dataTable value="#{documentBacking.results}" var="results">
<p:column headerText="Main Number">
<h:outputText value="#{results.mainNumber}" />
</p:column>
<p:column headerText="Secondary Number">
<h:outputText value="#{results.secNumber}" />
</p:column>
<p:column headerText="Form Type">
<h:outputText value="#{results.formType}" />
</p:column>
</p:dataTable>
@ViewScoped Backing Bean: @ViewScoped Backing Bean：
@ManagedBean
@ViewScoped
public class DocumentBacking {
private Document document = new Document();
private List<Document> results = new ArrayList<Document>();
public Document getDocument() {
return document;
}
public void setDocument(Document document) {
this.document = document;
}
public List<Document> getResults() {
return results;
}
public void setResults(List<Document> results) {
this.results = results;
}
public String search() {
results = new ArrayList<Document>();
// dummy data
Document doc = new Document();
doc.setMainNumber("1111");
doc.setSecNumber("2222");
doc.setFormType("OTHER");
doc.setSubFormType("TEST");
results.add(doc);
doc = new Document();
doc.setMainNumber("1234");
doc.setSecNumber("4321");
doc.setFormType("SOMETHING");
doc.setSubFormType("TESTER");
results.add(doc);
return "results.xhtml?faces-redirect=true";
}
}
2 个解决方案
解决方案1
0 2012-07-27 04:06:13
解决方案2
0 已采纳 2012-07-30 14:59:52
I decided to use f:viewParam 's and f:event type="preRenderView" . 我决定使用f:viewParam和f:event type="preRenderView" 。 This way i have bookmarkable pages via the query string params, and i'm generating the results on the results page in the preRenderView listener. 这样我通过查询字符串params可以收藏书签，我在preRenderView监听器的结果页面上生成结果。
I'm using the same search page as in my question. 我正在使用与我的问题相同的搜索页面。
Results page: 结果页面：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui"
xmlns:ui="http://java.sun.com/jsf/facelets">
<f:metadata>
<f:viewParam name="mainNumber" value="#{documentBacking.document.mainNumber}" />
<f:viewParam name="secNumber" value="#{documentBacking.document.secNumber}" />
<f:viewParam name="formType" value="#{documentBacking.document.formType}" />
<f:viewParam name="subFormType" value="#{documentBacking.document.subFormType}" />
<f:event type="preRenderView" listener="#{documentBacking.generateResults}" />
</f:metadata>
...
<p:dataTable value="#{documentBacking.results}" var="results">
<p:column headerText="Main Number">
<h:outputText value="#{results.mainNumber}" />
</p:column>
<p:column headerText="Secondary Number">
<h:outputText value="#{results.secNumber}" />
</p:column>
<p:column headerText="Form Type">
<h:outputText value="#{results.formType}" />
</p:column>
</p:dataTable>
@ViewScoped Backing Bean: @ViewScoped public class DocumentBacking { @ViewScoped Backing Bean：@ViewScoped公共类DocumentBacking {
private Document document = new Document();
private List<Document> results = null;
public Document getDocument() {
return document;
}
public void setDocument(Document document) {
this.document = document;
}
public List<Document> getResults() {
return results;
}
public void setResults(List<Document> results) {
this.results = results;
}
public void generateResults() {
results = new ArrayList<Document>();
// dummy data
Document doc = new Document();
doc.setMainNumber("9343");
doc.setSecNumber("71254");
doc.setFormType("OTHER FORMS");
doc.setSubFormType("CALGB");
results.add(doc);
doc = new Document();
doc.setMainNumber("1234");
doc.setSecNumber("4321");
doc.setFormType("SOMETHING");
doc.setSubFormType("MAYO");
results.add(doc);
}
public String search() {
return "results.xhtml?faces-redirect=true&includeViewParams=true";
}
} }
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