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使用omnifaces primefaces自动完成POJO支持

本文介绍了使用omnifaces primefaces自动完成POJO支持的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我想使用primefaces自动完成组件在我的项目，以避免编写特定的转换器，每个列表对象我想使用的的建议在here和here通过BalusC'，我试图复制完全相同的方式，但也没能得到这个工作。请查看以下code段和建议，如果我在这里缺少什么？

在code的第一部分[F：selectOneMenu用于]在没有anyissues工作的精绝

XHTML 

 ＆LT; HTML的xmlns =htt​​p://www.w3.org/1999/xhtml
    的xmlns：H =htt​​p://xmlns.jcp.org/jsf/html
    的xmlns：UI =htt​​p://xmlns.jcp.org/jsf/facelets
    的xmlns：P =htt​​p://primefaces.org/ui
    的xmlns：F =htt​​p://xmlns.jcp.org/jsf/core＆GT;
＆LT;用户界面：作文模板=WEB-INF /布局/ layout.xhtml＆GT;
    ＆LT; UI：定义名称=内容＆GT;
        ＆LT; H：形式＆GT;
            ＆所述; H：的outputText ID =SELECTED_STATUS
                值=＃{} mybean.objLuStatus.strDescColVal/＆GT;
            ＆LT;  -  H：！selectOneMenu用于工作的罚款 - ＆GT;
            ＆LT; H：selectOneMenu用于ID =的iterator2VALUE =＃{} mybean.objLuStatus
                转换器=omnifaces.SelectItemsConverter＆GT;
                ＆LT; F：选择信息itemLabel =选择项noSelectionOption =真/＆GT;
                ＆LT; F：selectItems的值=＃{} mybean.lstStatusVAR =实体
                    itemLabel =＃{} entity.strDescColValitemValue =＃{}实体/＆GT;
                ＆LT; F：AJAX渲染=SELECTED_STATUS/＆GT;
            ＆LT; /小时：selectOneMenu用于＆GT;
            ＆LT;  -  P：自动完成不工作 - ＆GT;
            ＆LT;电话号码：自动完成ID =iterator3VALUE =＃{} mybean.objLuStatus
                转换器=omnifaces.ListConverter下拉菜单=真正的VAR =实体
                itemLabel =＃{} entity.strDescColVal
                占位=-----选择之一-----itemValue =＃{}实体
                completeMethod =＃{} mybean.completeList＆GT;
                ＆LT; F：AJAX渲染=SELECTED_STATUS/＆GT;
            ＆LT; / P：自动完成＆GT;
            ＆LT; H：的commandButton值=提交行动=＃{} mybean.post/＆GT;
        ＆LT; /小时：形式＆GT;
    ＆LT; / UI：定义＆GT;
＆LT; / UI：组合物＆gt;
＆LT; / HTML＆GT;

托管Bean 

 的Bean;
进口的java.util.ArrayList;
进口的java.util.List;进口javax.annotation.PostConstruct;
进口javax.faces.bean.ManagedBean;
进口javax.faces.bean.ViewScoped;进口com.ntr.foundation.model.LuStatus;@ManagedBean（NAME =mybean）
@ViewScoped
公共类MyManagedBean扩展BaseManagedBean实现Serializable {    清单＆LT; LuStatus＆GT; lstStatus;
    LuStatus objLuStatus;    @PostConstruct
    公共无效的init（）{
        lstStatus =新的ArrayList＆LT; LuStatus＆GT;（）;
        lstStatus.add（新LuStatus（1，草稿，DraftLong））;
        lstStatus.add（新LuStatus（2，已批准，ApprovedLong））;
    }    公开名单＆LT; LuStatus＆GT; getLstStatus（）{
        返回lstStatus;
    }    公共无效setLstStatus（列表＆LT; LuStatus＆GT; lstStatus）{
        this.lstStatus = lstStatus;
    }    公共无效后（）{
        的System.out.println（返回值+ objLuStatus）;
    }    公共LuStatus getObjLuStatus（）{
        返回objLuStatus;
    }    公共无效setObjLuStatus（LuStatus objLuStatus）{
        this.objLuStatus = objLuStatus;
    }    公开名单＆LT; LuStatus＆GT; completeList（字符串strQuery）{
        返回lstStatus;
    }}

但我得到以下错误...

在此先感谢.. 

 产生的原因：显示java.lang.NullPointerException
    在org.omnifaces.converter.ListConverter.getAsObject（ListConverter.java:39）omnifaces-1.7.jar：1.7]
    在org.primefaces.component.autocomplete.AutoCompleteRenderer.getConvertedValue(AutoCompleteRenderer.java:600) [primefaces-4.0.jar：4.0]
    在javax.faces.component.UIInput.getConvertedValue（UIInput.java:1046）[JSF-API-2.2.4.jar：2.2]
    在javax.faces.component.UIInput.validate（UIInput.java:976）[JSF-API-2.2.4.jar：2.2]


解决方案

对不起，我忽略了ListConverter文件的一行..我错过喂养与原来的列表类似下面。

的ListConverter

 ＆LT;○：转换器converterId =omnifaces.ListConverter列表=＃{} mybean.lstStatus/＆GT;

我得到这个通过添加上述code线的工作。

最后XHTML是将会是什么样的下面。

 ＆LT;电话号码：自动完成ID =iterator3VALUE =＃{} mybean.objLuStatusforceSelection =真
        下拉=真正的VAR =实体
        itemLabel =＃{} entity.strDescColVal
        占位=-----选择之一-----itemValue =＃{}实体
        completeMethod =＃{} mybean.completeList＆GT;
        ＆LT; F：AJAX渲染=SELECTED_STATUS/＆GT;
         ＆LT;○：转换器converterId =omnifaces.ListConverter列表=＃{} mybean.lstStatus/＆GT;
    ＆LT; / P：自动完成＆GT;

感谢您omnifaces团队提供这样一个有用的工具...

I am trying to use primefaces autocomplete component in my project, in order to avoid writing specific converter to each list object I am trying to use omnifaces as suggested in here and here by 'BalusC', I tried to replicate exactly same way but could not able get this work. please review below code snippet and advice if I am missing anything here?

First part of the code [f:selectOneMenu] is working absolutely fine without anyissues

XHTML

<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://xmlns.jcp.org/jsf/html"
    xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
    xmlns:p="http://primefaces.org/ui"
    xmlns:f="http://xmlns.jcp.org/jsf/core">
<ui:composition template="WEB-INF/layout/layout.xhtml">
    <ui:define name="content">
        <h:form>
            <h:outputText id="selected_status"
                value="#{mybean.objLuStatus.strDescColVal}" />
            <!-- h:selectOneMenu Working fine -->
            <h:selectOneMenu id="iterator2" value="#{mybean.objLuStatus}"
                converter="omnifaces.SelectItemsConverter">
                <f:selectItem itemLabel="Choose item" noSelectionOption="true" />
                <f:selectItems value="#{mybean.lstStatus}" var="entity"
                    itemLabel="#{entity.strDescColVal}" itemValue="#{entity}" />
                <f:ajax render="selected_status" />
            </h:selectOneMenu>
            <!-- p:autoComplete is NOT Working -->
            <p:autoComplete id="iterator3" value="#{mybean.objLuStatus}"
                converter="omnifaces.ListConverter" dropdown="true" var="entity"
                itemLabel="#{entity.strDescColVal}"
                placeholder="----- Select One -----" itemValue="#{entity}"
                completeMethod="#{mybean.completeList}">
                <f:ajax render="selected_status" />
            </p:autoComplete>
            <h:commandButton value="Submit" action="#{mybean.post}" />
        </h:form>
    </ui:define>
</ui:composition>
</html>

Managed Bean

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;

import com.ntr.foundation.model.LuStatus;

@ManagedBean(name = "mybean")
@ViewScoped
public class MyManagedBean extends BaseManagedBean implements Serializable {

    List<LuStatus> lstStatus;
    LuStatus objLuStatus;

    @PostConstruct
    public void init() {
        lstStatus = new ArrayList<LuStatus>();
        lstStatus.add(new LuStatus("1", "Draft", "DraftLong"));
        lstStatus.add(new LuStatus("2", "Approved", "ApprovedLong"));
    }

    public List<LuStatus> getLstStatus() {
        return lstStatus;
    }

    public void setLstStatus(List<LuStatus> lstStatus) {
        this.lstStatus = lstStatus;
    }

    public void post() {
        System.out.println("returned value " + objLuStatus);
    }

    public LuStatus getObjLuStatus() {
        return objLuStatus;
    }

    public void setObjLuStatus(LuStatus objLuStatus) {
        this.objLuStatus = objLuStatus;
    }

    public List<LuStatus> completeList(String strQuery) {
        return lstStatus;
    }

}

But I am getting below error...

Thanks in advance..

Caused by: java.lang.NullPointerException
    at org.omnifaces.converter.ListConverter.getAsObject(ListConverter.java:39) [omnifaces-1.7.jar:1.7]
    at org.primefaces.component.autocomplete.AutoCompleteRenderer.getConvertedValue(AutoCompleteRenderer.java:600) [primefaces-4.0.jar:4.0]
    at javax.faces.component.UIInput.getConvertedValue(UIInput.java:1046) [jsf-api-2.2.4.jar:2.2]
    at javax.faces.component.UIInput.validate(UIInput.java:976) [jsf-api-2.2.4.jar:2.2]
解决方案

Sorry I overlooked one line of ListConverter documentation.. I missed feeding the ListConverter with the original list like mentioned below.

<o:converter converterId="omnifaces.ListConverter" list="#{mybean.lstStatus}" />

I got this worked by adding above line of code.

Final xhtml is going to look like below..

    <p:autoComplete id="iterator3" value="#{mybean.objLuStatus}" forceSelection="true"
        dropdown="true" var="entity"
        itemLabel="#{entity.strDescColVal}"
        placeholder="----- Select One -----" itemValue="#{entity}"
        completeMethod="#{mybean.completeList}">
        <f:ajax render="selected_status" />
         <o:converter converterId="omnifaces.ListConverter" list="#{mybean.lstStatus}" />
    </p:autoComplete>

Thank you to omnifaces team for providing such a useful utility...

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10-16 16:05
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