JSF单选按钮

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2023-03-14

以下部分显示如何使用JSF中的创建单选按钮。

<h:selectOneRadio>标签呈现一组类型为“radio”的HTML输入元素，并使用HTML表格和标签标签进行格式化。

以下JSF代码 -

<h:selectOneRadio value="#{userData.data}">
   <f:selectItem itemValue="1" itemLabel="Item 1" />
   <f:selectItem itemValue="2" itemLabel="Item 2" />           
</h:selectOneRadio>

被渲染生成以下HTML代码 -

<table>
   <tr>
      <td><input type="radio" checked="checked" name="j_idt6:j_idt8" 
            id="j_idt6:j_idt8:0" value="1" />
         <label for="j_idt6:j_idt8:0"> Item 1</label></td>
      <td><input type="radio" name="j_idt6:j_idt8" 
            id="j_idt6:j_idt8:1" value="2" />
         <label for="j_idt6:j_idt8:1"> Item 2</label></td>
   </tr>
</table>

硬编码的单选按钮

以下是文件：index.xhtml 中的代码。

<?xml version="1.0" encoding="UTF-8"?>
<!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:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core">
    <h:body>
      <h:form>
        Hard-coded with "f:selectItem": 
       <h:selectOneRadio value="#{user.item}">
         <f:selectItem itemValue="Red" itemLabel="Color - Red" />
         <f:selectItem itemValue="Green" itemLabel="Color - Green" />
         <f:selectItem itemValue="Blue" itemLabel="Color - Blue" />
       </h:selectOneRadio>

    <br /><br />
      <h:commandButton value="Submit" action="result" />
    <h:commandButton value="Reset" type="reset" />
      </h:form>
    </h:body>
</html>

以下是文件：result.xhtml 中的代码 -

<?xml version="1.0" encoding="UTF-8"?>
<!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:h="http://java.sun.com/jsf/html">
<h:body>
  <p>Selected: #{user.item}</p>
</h:body>
</html>

以下是文件：UserBean.java 中的代码 -

package com.yiibai;

import java.io.Serializable;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean(name="user")
@SessionScoped
public class UserBean implements Serializable{
  public String item;

  public String getItem() {
    return item;
  }

  public void setItem(String i) {
    this.item = i;
  }
}

单选按钮内项

以下是文件：index.xhtml 中的代码。

<?xml version="1.0" encoding="UTF-8"?>
<!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:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core">
    <h:body>
      <h:form>
        Generated by Object array and iterate with var :
       <h:selectOneRadio value="#{user.item}">
         <f:selectItems value="#{user.itemValue}" var="c"
         itemLabel="#{c.label}" itemValue="#{c.value}" />
       </h:selectOneRadio>

    <br /><br />
      <h:commandButton value="Submit" action="result" />
    <h:commandButton value="Reset" type="reset" />
      </h:form>
    </h:body>
</html>

以下是文件：result.xhtml 中的代码。

<?xml version="1.0" encoding="UTF-8"?>
<!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:h="http://java.sun.com/jsf/html">
<h:body>
  <p>Selected: #{user.item}</p>
</h:body>
</html>

以下是文件：UserBean.java 中的代码。

package com.yiibai;

import java.io.Serializable;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean(name="user")
@SessionScoped
public class UserBean implements Serializable{
  public String item;

  public String getItem() {
    return item;
  }

  public void setItem(String i) {
    this.item = i;
  }
  //Generated by Object array
  public static class Item{
    public String label;
    public String value;

    public Item(String l, String v){
      this.label = l;
      this.value = v;
    }

    public String getLabel(){
      return label;
    }

    public String getValue(){
      return value;
    }
  }
  public Item[] itemList;

  public Item[] getItemValue() {

    itemList = new Item[3];
    itemList[0] = new Item("Color - Red", "Red");
    itemList[1] = new Item("Color - Green", "Green");
    itemList[2] = new Item("Color - Blue", "Blue");

    return itemList;
  }  
}

由地图生成的单选按钮

以下是文件：UserBean.java 中的代码 -

package com.yiibai;

import java.io.Serializable;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean(name="user")
@SessionScoped
public class UserBean implements Serializable{
  public String item;

  public String getItem() {
    return item;
  }

  public void setItem(String i) {
    this.item = i;
  }
  //Generated by Map
  private static Map<String,Object> itemValue;
  static{
    itemValue = new LinkedHashMap<String,Object>();
    itemValue.put("Color - Red", "Red"); //label, value
    itemValue.put("Color - Green", "Green");
    itemValue.put("Color - Blue", "Blue");
  }

  public Map<String,Object> getItemValue() {
    return itemValue;
  }  
}

以下是文件：index.html 中的代码 -

<?xml version="1.0" encoding="UTF-8"?>
<!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:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core">
    <h:body>
      <h:form>
        Generated by Map :
       <h:selectOneRadio value="#{user.item}">
         <f:selectItems value="#{user.itemValue}" />
       </h:selectOneRadio>

    <br /><br />
      <h:commandButton value="Submit" action="result" />
    <h:commandButton value="Reset" type="reset" />
      </h:form>
    </h:body>
</html>

以下是文件：result.html 中的代码 -

<?xml version="1.0" encoding="UTF-8"?>
<!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:h="http://java.sun.com/jsf/html">
<h:body>
  <p>Selected: #{user.item}</p>
</h:body>
</html>