Parameter Passing / Request Parameters in JSF 2.0 (转)

时间:2022-03-18 03:21:27

This Blog is a compilation of various methods of passing Request Parameters in JSF (2.0 +)

(1)  f:viewParam

One of the features added in JSF 2.0 is "View Parameters"; Simply speaking it allows adding "Query string" or "Request Parameter" to the intended URL. One of the benefits is that it facilitates URL bookmarking.
In JSF 2.0 "View Parameters" is implemented by UIViewParameter. This class extends UIInput (jee6 api docs) and hence inherits features like Converter's, Validator's, full JSF lifecycle support, value binding and listeners.
"View Parameters" are defined in a Facelet page using <f:viewParam> tag. This tag is used inside metadata facet of a view <f:metadata>, which causes a UIViewParameter to be attached as metadata for the current view.

(source index.xhtml)

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The above tag/config tells JSF engine to bind the value of "day" request parameter from the url (the url would be something like http://hostname/index.xhtml?day=Sunday) to the "day" property of "viewParamManagedBean". As mentioned above, "UIViewParameter" extends "UIInput", so it inherits all attributes like "required", when required="true", if the url does not include the required param, the page is not displayed.

This example attaches an component event listener (source page2.xhtml)

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Its noteworthy that "setDay()" method of BackingBean is called in update model value phase, so its not available in @PostConstruct and so as a result to do initialization/preloading based on the set value, you need event listener as described above.

You can also include the view params in the links by simply using attribute includeViewParams="true"

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You can also use "includeViewParams" in backing bean to include viewParams in the navigation link as follows.

aaarticlea/png;base64,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" alt="" />

(2) f:param

"View Params" is a good way of passing along parameters i.e. parameter that your page receives. However to send a parameter from a facelet to backing bean, or that matter to any other facelet you can use following approach:

aaarticlea/png;base64,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" alt="" />

and in the backing bean declare a @ManagedProperty and link its value to the request parameter by

aaarticlea/png;base64,iVBORw0KGgoAAAANSUhEUgAAAe4AAACCCAIAAAAPNLyUAAANI0lEQVR4nO2dS3bcOAxFte/sw+f0uPeTZfSkew/qgROFJoBHUCJLYvneUwOKBAHwoydaTjnbDgAAi7PdnQAAAFylLeXbb16QDQAAnKAh0KWCH+VK3GdrfeT8esRHPaJ+/th+/tjKQrLX9aDH54qrc3Gr8hMok3nB/ETr/pydCUtwRsp3I4Kzt90kKR/lZAjnpHxIXLf8gri3jDdDNCcz8kTKYQhZKXe1u2wtm9xje96+qt+9be160JeZ54GbdsaPdVvR7FKeBI+Ce0J0L0s/tkmcgoVsRX7c6Na+NI7870bCMnGb43WH3GUfzUk+bj5/6/wT1BzypKTc6mkkzVYZj8LRJfIZ+XGlMOqYzCdZk/dznaa22sumQVKSdA7WJp+GlbAqhNB6Ebdp3+yYtD8ubWXTTzINpByGcEnKoyZ7Go0K0en1igS7B+3odJyX8q5T9olTeYS41W1lqTuu+rinzubpUqiYtm8WdD69p+OMZHfZR2U9z135C5ByyJOS8j1+OV5JefN0LJ4Bbkf3Ute4eZ7wE/l8Mb1Srv240tnltss+U4gqRdyuU7aob+afjHvajwYphzxZKRf10Wk6eSrv8q8Ts5Yn/LhPr3tvKntkLpvEpW06IeWZU3nzTcIJKc+captxRX0m/0zcK340SDnk6ZBy+7ahvCzNjhr7kqEsVPZNP1FiVRe30vqJ4lZJZuxn40p57w/4u3ybEQU9upSFyLkwKwuRcSZu0t7W5+etd7xdfvScVyDlkCe1n14vXhkemBI8k+Qp+FGwvaGLhbcLex0E0Wl6Fdje0AXbBQBgeZByAIDlOSPl//37N5/Tn+FLCACAlCPlALA8SDlSDgDLg5Qj5QCwPEg5Ug4Ay3PmK0K3q+HSn5mrCQDflDNf3P/v37+rb7Hfro/iUyZ5S6rVFE1cTAD4rpyU8koWn6Dmbg5VknfliZQDwFSyUl6+Y9FSHp3Wq9NxVbBS2/Rj+1p7od3RaT3yYxPuGi9SDgDzSEn59vVvGQopt3LWPB2f9iMeJ02pjfLR/q3ZifHOXlEA+IZckvLo9GqbkhJc2rt+9CnYlfLMIyFycjpP4Wf2igLAN2TAC5bk0bhXIpu6nAw9W8p7/cxdTwD4lnT82vPgorTZU7atH3tqbuZ55aeH3vHOWUcA+NZc/ceIkXqKFyOuYh712k/k3IYos3LtIz9X6sV4j6aJiwkA35V7viJkVfj5n1E5z1xNAPim3PDF/ehM/eTPwJyHLyEAAH+D5dWf4UsIAICUI+UAsDz8h3AAAMuDlAMALA9SDgCwPEg5AMDyIOUAAMuDlAMALM9IKd+2f7btn3MGuuNFmomNDvfn+7Hld/org+v+red5RKN4TfQm0ZzfleGQ/fbifTuWakWue+sNfd1P3m3SoCtWd5chgYsMGjvvrq35eimPLoeHuEXNH6Xjn0Rz8rQ8u3j9/TLoITR3/3cl8Eq3Q+Kec9LM7Ne5oDoglJdV+ahx94StjIzL+sz20vbCf9VU1tshi6EVlqGUi6Ni1ZS5FOGiyqb9FuA60XFdJzrPMj3hTdhHc56Mm88/Ito5e7EJ7b1z4n5xndheYjPbuGKT5/f/LsXInc9o0d0a4UckkPHT3CdRkpm4yf3jOkn1SvitlVqU7c6w3qIo0WVu6zTshf8q/676OJ8vWzNqdWtsX+sqKoso5X7S9lGh8pCJ25tn5L9Zdu1tkqfzEfYurg5WharJ9nL9uJeR/+Rtpe/ZZhou0fxXNpW98Ja/dGualpk89XBO5JlMMtUr4bch32W5ueQnpDxDl9YfNc3Td2SfyOeLxEStVU21+8tC1SuSKtGklSuKWxZEPlHcqNxrvxky9nk/J/LXNM8ESRnVR+Om28hexBV3aH7/m76p+c94KGtcP9pbvj7aD81ewklm/+T3WN0x4foNpTwZrre+MPi1bNE+c5c876dpn+zi2keF8lLEml3OjHe2nybzpFyHs1KeyTAj5Zk0YntfCl2bTKu+FN6i1U+G642b3zADeiX8drxUEU/+qMat73+h0fcIyfykuX8dY1c+eyF/UZOosfJhDbokKeri2kcF4XB4uQqXnJ+uWK6ffF/Ne0j56f0v5ll00Q6jy2hjJ6M088zsn0yeeU72SvgNf7Davr6hs5eRn+iFRlSfGsnZX2NGA8kkKfOpta+stK2icvf2k+s/CiG6WHsbVDvUfqyBngobXcyPSFLb6/pM/hF2q0Q7zdprP9f928qqbFt1MvEkOM9Xd55FpW4qazKuTtfvZs+cy9N20bPXS9+pHOBl5Lf+0nB/geXEzs8eMc6mBNBH7xFmabi/YBTvf7cAALw9SDkAwPIg5QAAy4OUAwAsD1IOALA8SDkAwPIg5QAAy4OUAwAsD1IOALA8SDkAwPIg5QAAy4OUAwAsD1IOALA8SDkAwPIg5QAAy4OUAwAsD1IOALA8SDkAwPIg5QAAy4OUAwAsD1IOALA8SDkAwPIg5QAAy4OUAwAsD1IOALA8E6X84+Ojqx4AAM7xICn/+Ph4P5XvHdFUezHDA2e+uY5vudAwiWO3RNvm4nZq+l+FWVJ+TjKeMJVPyKFkbD6vGV0zytMm+UZWn4rZ+WekFinfnyDlH7+pWj8KIuPM7NsuGf/Ws2hqxq0qd2/f9AaNMtFJCnvhJ5qiyE9zfj6CFaycZKb6xKLo0HpcH8FGyvuxfU/n35yHrvGWxkdNxn9zvJl8xJBtMrtZl2SeNnTkfzmmSHk0KbbeXWZrWZk1A43yH1XmV90dstg9mZp8YnlvwlJMjrjnRc7WZsj6Zuyj9E6Myy1n/ER9k2RkqLkcIs9S746mgfdLZntEuTUdntANpFxxTsp3b4UOIpuuTKot2/Rf9bXGTfSQmxMi8hH2ItX80rj10byJdUy6bZaFq66liaSnd1yRHIh95SbZtZ10DlHcyI8Yb1XQ42o6713TJnpdmnGH5PA0xku52DrNyswttBfbqzeZyH8zzxM2kaXeUpka0dqUiSurk+/enJ/Z65vvojtqybDl5Ma4IiuZuBmpdS+FlGfy0ZXNpjyzdWNFHiTl7umgqi9be+/byL/u4trfJeVNez1vroeuuJnublxrL8Z1fX2TXXSl9l/OSdf8WLfNNJp9M3kKJ6OkvPf+Os1s3ViRwVLepeNH0zHp1aq49U2H2r+td53b+yEybsbVg7JNmXyEfXM+k0M7Xb9762Uzj8Z12ETdXW+ZuCL5/LjEQIQfEXeX86CH0JyHzHhdMzvkpCs9n3oeunCzFfVH65WgT+Z+KR8baEYveD3PXKknZPWEHNbljWdvvS/u9z7SR50C4DU8drGekNgTcliUt5+69aQcAAAqkHIAgOVBygEAlgcpBwBYHqQcAGB5kHIAgOVBygEAlme8lG+/Ge4ZJvHzx1YVAGAtBt+6pYJX5UPfn6b1ZTLbV+5N7CJV/j9/bJ9KfRTKpqpgm56PHVdvd+228r/69oA340VSvheK+UCVFE+gO9L5wukcklL+Hjr+ycWE3e5IOSzBLCm3eh1JuXsKFrofnZrtwb/L3g7BHU6U6sX8I//bV8RgbZT9K65kf8pT+XG7VPZ7cLS3Tir7KLQ1jhKwlE60f2scPdXcSbCtdpIB7mKKlFt9jJqEAFWKpu2bHZP2tikyG5t/5N92aeYZ1USS1Hsqr8RX+9w90dc5VI8KreZRIJ1PM40ot6oJKYfncLOU7/LgGZWtvZDsLvuqS2QTVTbzj/KJ/CfrM1IekZG/qF4c8DN+3IO5zkokcyKfi++UkHJ4DlOkfA9eLLhmTZuMfbLedS7iii5D8m/6z3TpOstX9L5g2QMpTJ6Co8rhUq4HEp33u3R8R8rhScySct3kSlvmVB7ZZ+pFMqtIuRvuipTvp16w6L5dL6Arey3l+mETvWCJeiHl8E5MlHL3rUVVdptO2Nt6G9pKto5bjct1UjX11tvkdXQ94Zn6Cn34Fe/KXX1033Tn7SMPVZcon92ouVvfO15BcpIBXsD4vSh052U84R57TQ4iSiaB5nuM60fXZ8KRHN6M99mO4lR7YzI3hpgR3T1fr8WoITxhmwEcsB0BAJYHKQcAWB6kHABgeZByAIDlQcoBAJYHKQcAWB6kHABgeZByAIDlmfttz+tfo3jBFzG2v7btLx5pALAwc/8GS3U5NtZAkHIAWJqJUl7Vu1+sL8/vbpP7t6h285zYzU8DzSfH52H8U8RLKT/q3cqqXGUFAHALE1+wWKkV9sKbsLeFpsNfNkambb01c8vJiAAA85grQJkXLFoEXSm35eRj44+BlOzoYB51BwC4F6T8y6WQ+OMSHQeApzH+XXkk35my61DUTH3BYv9lSyTlvGABgHuZ8mtP9125W799xTWuXo5Xv9uMmtqpmt9k6vqj1R1UMxwAwDzeU4Pmaasr5ZNiAQAkeR8Zik73w/ybX4QCADwEhAkAYHmQcgCA5UHKAQCWBykHAFgepBwAYHmQcgCA5UHKAQCWBykHAFgepBwAYHn+B9ggAF5l93y0AAAAAElFTkSuQmCC" alt="" />

To send a parameter to another JSF page

aaarticlea/png;base64,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" alt="" />

In the managed bean of page2, you can declare a managed property (as shown in example above) and capture value of passed in parameter.

(3) Method Expression

You can send parameter as an argument to an action method i.e. bean.actionMethod(Type param1, Type param2)
 Here is a sample JSF code with datatable displaying day's of a week, and a select button in each row. The action method is passed an argument, which is the declared variable of the datatable:

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" alt="" />

Backing Bean:

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" alt="" />

When you include a f:param tag in “h:commandButton” or "h:commandLink", the parameter is turned into request parameter,

aaarticlea/png;base64,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" alt="" />

which in the backing bean can be retrieved as

aaarticlea/png;base64,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" alt="" />

(4) f:Attribute

Parameter/Values can be passed to an actionListener method (of a commandUI) using f:attribute
In JSF page

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In the Backing Bean capture the value using

aaarticlea/png;base64,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" alt="" />

One Could also use f:Attribute to pass an attribute to an component. for e.g.

 <h:outputLabel for="sportsPer" value="Do You Play Tennis:" />
<h:selectOneRadio id="sportsPer" value="#{someBackingBeanView.likesTennis}" validator="#{someBackingBeanView.validatePlayer}">
<f:selectItem itemLabel="No" itemValue="N" />
<f:selectItem itemLabel="Yes" itemValue="Y" />
<f:attribute name="clubNameAttr" value="#{clubName.submittedValue}" />
</h:selectOneRadio>
Where "clubNameAttr" is the bind id of a form field whose value is required in the validator method (multi/complex form field validator).
<h:inputText id="clubNameId" binding="clubName" value=" #{someBackingBeanView.clubName}"/>

Now in the validator method, one can get the value of attribute "clubNameAttr"

 public void validatePlayer(FacesContext context, UIComponent component, Object value) throws ValidatorException {
String clubNameAttr = (String)component.getAttributes().get("clubNameAttr");
//do something ...
}

(5) f:setPropertyActionListener

Parameter/Values can also be passed to an actionListener method (of a commandUI) using f:setPropertyActionListener
In JSF page

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In the Backing Bean

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" alt="" />

One thing to note is that the setDay() is called after the listener method (listenerToGetAttributes(..)) completes. So if the scope of "DayOfWeekManagedBean" is higher than Request, then you will see that the value of "day" in listener method is of the previously clicked button and NOT the current (because listeners are invoked in the sequence they are defined).

(6) JSTL tag <c:set>

There is no equivalent tag for <c:set>in JSF, f:param is NOT the same. This one comes in handy when f:param is not available in backing bean; for example when passing a parameter to <ui:include> tag. If you add <f:param> for example <f:param  name="activeIndex" value="0"/>, the value will be available in the included JSF page as #{activeIndex}, but NOT in the constructor of the backing bean of the included page. In such scenario, one can use <c:set>

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In the Backing Bean capture the value using

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" alt="" />

原文链接:http://incepttechnologies.blogspot.com/p/view-parameters-in-jsf-20.html

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