将浏览器本地存储与JSF2和Primefaces一起使用
您好,这不是一个严格意义上的问题,我想与大家分享我的解决方案,使用JSF2和Primefaces的浏览器本地存储 我发现很少有关于在jsf2和primefaces中使用本地存储的信息,所以分享我的工作似乎很有用 支持bean:将浏览器本地存储与JSF2和Primefaces一起使用,primefaces,jsf-2,Primefaces,Jsf 2,您好,这不是一个严格意义上的问题,我想与大家分享我的解决方案,使用JSF2和Primefaces的浏览器本地存储 我发现很少有关于在jsf2和primefaces中使用本地存储的信息,所以分享我的工作似乎很有用 支持bean: @Component("pocLocalStorageBean") @Scope(WebApplicationContext.SCOPE_REQUEST) public class PocLocalStorageBean { private static fin
@Component("pocLocalStorageBean")
@Scope(WebApplicationContext.SCOPE_REQUEST)
public class PocLocalStorageBean {
private static final long serialVersionUID = 1L;
private String[] selectedCities;
private List<String> cities;
@PostConstruct
public void initialize() {
List<String> cities = new ArrayList<String>();
cities.add("Miami");
cities.add("London");
cities.add("Paris");
cities.add("Istanbul");
cities.add("Berlin");
cities.add("Barcelona");
cities.add("Rome");
cities.add("Brasilia");
cities.add("Amsterdam");
setCities(cities);
}
//GETTER E SETTER HERE
}
@组件(“pocLocalStorageBean”)
@作用域(WebApplicationContext.Scope\u请求)
公共类PocLocalStorageBean{
私有静态最终长serialVersionUID=1L;
私有字符串[]所选城市;
私人名单城市;
@施工后
公共无效初始化(){
List cities=new ArrayList();
城市。添加(“迈阿密”);
城市。添加(“伦敦”);
城市。添加(“巴黎”);
城市。添加(“伊斯坦布尔”);
城市。添加(“柏林”);
城市。添加(“巴塞罗那”);
城市。添加(“罗马”);
城市。添加(“巴西利亚”);
城市。添加(“阿姆斯特丹”);
城市(城市);
}
//我是盖特·塞特
}
xhtml页面:
<h:form id="yuorFormId" cache="false">
<p:remoteCommand name="updateUiAfterLoadChoicesFromLocalStorage" update=":yuorFormId:yourSelectManyCheckboxId">
</p:remoteCommand>
<p:remoteCommand oncomplete="loadCitiesChoicesFromLocalStorage(#{pocLocalStorageBean.cities.size()});" autoRun="true">
</p:remoteCommand>
<div class="ui-g ui-fluid">
<div class="ui-g-12 ui-md-12">
<div class="card">
<p:selectManyCheckbox id="yourSelectManyCheckboxId" value="#{pocLocalStorageBean.selectedCities}" layout="responsive" columns="3">
<f:selectItems value="#{pocLocalStorageBean.cities}" var="city" itemLabel="#{city}" itemValue="#{city}"/>
<p:ajax oncomplete="setCitiesChoicesToLocalStorage(#{pocLocalStorageBean.cities.size()})"/>
</p:selectManyCheckbox>
</div>
</div>
</div>
</h:form>
以及javascript函数:
function findPreviousChoose(arrayChoicesFromLocalStorage,valueToFind){
if(arrayChoicesFromLocalStorage != null && arrayChoicesFromLocalStorage.length > 0){
var arrayLength = arrayChoicesFromLocalStorage.length;
for (var j = 0; j < arrayLength; j++) {
var iteratedChoose = arrayChoicesFromLocalStorage[j];
if(iteratedChoose!=null){
if(iteratedChoose.value == valueToFind){
return iteratedChoose;
}
}
}
}
return null;
}
function parseSafeJSON(str){
try {
if(str!=null){
var obj = JSON.parse(str);
return obj;
}
} catch (ex) {
return null;
}
return null;
}
function loadCitiesChoicesFromLocalStorage(citiesNumber){
var arrayChoicesFromLocalStorageStringed = localStorage.getItem('CITIES_LOCAL_STORE_KEY');
if(arrayChoicesFromLocalStorageStringed!=null){
var arrayChoicesFromLocalStorage = parseSafeJSON(arrayChoicesFromLocalStorageStringed);
var elementId = 'yuorFormId:yourSelectManyCheckboxId';
var element = document.getElementById(elementId);
var i;
for (i = 0; i < citiesNumber; i++) {
var elementIterated = document.getElementById(elementId+':'+i);
var valueIterated = elementIterated.value;
var previousChoose = findPreviousChoose(arrayChoicesFromLocalStorage,valueIterated);
if(previousChoose != null) {
elementIterated.defaultChecked = previousChoose.defaultChecked;
}
}
//update the needed components:
updateUiAfterLoadChoicesFromLocalStorage();
}
}
function setCitiesChoicesToLocalStorage(citiesNumber) {
var elementId = 'yuorFormId:yourSelectManyCheckboxId';
var element = document.getElementById(elementId);
var i;
var arrayChoices = new Array();
for (i = 0; i < citiesNumber; i++) {
var elementIterated = document.getElementById(elementId+':'+i);
var valueIterated = elementIterated.value;
var defaultCheckedIterated = elementIterated.checked;
var objIterated = { "value":valueIterated, "defaultChecked":defaultCheckedIterated};
arrayChoices.push(objIterated);
}
var storageValuesArray = JSON.stringify(arrayChoices);
localStorage.setItem('CITIES_LOCAL_STORE_KEY', storageValuesArray);
}
函数findPreviousChoose(arrayChoicesFromLocalStorage,valueToFind){
if(arrayChoicesFromLocalStorage!=null&&arrayChoicesFromLocalStorage.length>0){
var arrayLength=arrayChoicesFromLocalStorage.length;
对于(var j=0;j
我还向primefaces论坛报告了我的解决方案:
如果您不使用primefaces,而只使用JSF2.3,那么它应该使用h:commandScript而不是p:remoteCommand(但我没有尝试):
对于那些使用jsf<2.3而不使用primefaces的人,我不知道该解决方案(欢迎对此场景提出任何建议)