你的答案不清楚，但是，答案肯定是YES，JSF可以配泛型。
不过，这取决于您明智地使用泛型的程度，最终取决于您是否完全了解泛型。
据我所知，您将使用通用接口作为实现类中包含的对象的 包装器。
使用带有 包装的 getter/setter 的类
使用这种方法，您不会直接处理 MyInterface 实现，而是处理其内容，由接口方法定义。
基础接口：
public interface MyInterface<T> {
void setMyValue(T value);
T getMyValue();
}
实现类：
public class MyString implements MyInterface<String> {
private String myValue;
public MyString(String myValue) {
this.myValue = myValue;
}
public void setMyValue(String value) {
this.myValue = value;
}
public String getMyValue() {
return myValue;
}
@Override
public String toString() {
return myValue;
}
}
和
public class MyInteger implements MyInterface<Integer> {
private Integer myValue;
public MyInteger(Integer myValue) {
this.myValue = myValue;
}
public void setMyValue(Integer value) {
this.myValue = value;
}
public Integer getMyValue() {
return myValue;
}
@Override
public String toString() {
return Integer.toString(myValue);
}
}
托管 bean（带有 匿名类）：
@ManagedBean
@RequestScoped
public class MyInterfaceBean {
private MyString myString;
private MyInteger myInteger;
private MyInterface<Float> myFloat;
public MyInterfaceBean() {
myString = new MyString("String");
myInteger = new MyInteger(1);
myFloat = new MyInterface<Float>() {
private Float myValue;
public void setMyValue(Float value) {
this.myValue = value;
}
public Float getMyValue() {
return myValue;
}
@Override
public String toString() {
return Float.toString(myValue);
}
};
myFloat.setMyValue(3.1f);
}
public String getMyString() {
return myString.getMyValue();
}
public void setMyString(String myString) {
this.myString.setMyValue(myString);
}
public Integer getMyInteger() {
return myInteger.getMyValue();
}
public void setMyInteger(Integer myInteger) {
this.myInteger.setMyValue(myInteger);
}
public Float getMyFloat() {
return myFloat.getMyValue();
}
public void setMyFloat(Float myFloat) {
this.myFloat.setMyValue(myFloat);
}
public String action() {
return null;
}
}
观点：
<h:outputText value="String: #{myInterfaceBean.myString}"/>
<br/>
<h:outputText value="Integer: #{myInterfaceBean.myInteger}"/>
<br/>
<h:outputText value="Float: #{myInterfaceBean.myFloat}"/>
<br/>
<h:form>
<h:outputText value="String: "/><h:inputText value="#{myInterfaceBean.myString}"/>
<br/>
<h:outputText value="Integer: "/><h:inputText value="#{myInterfaceBean.myInteger}"/>
<br/>
<h:outputText value="Float: "/><h:inputText value="#{myInterfaceBean.myFloat}"/>
<br/>
<h:commandButton value="Submit" action="#{myInterfaceBean.action}"/>
</h:form>
使用带有 @FacesConverter 的类
另一种方法是使用@FacesConverter，以便JSF 知道如何将输入字段中的字符串转换为实现MyInterface 的对象。
托管 bean（带有 匿名类）：
@ManagedBean
@RequestScoped
public class MyInterfaceBean {
private MyString myString;
private MyInteger myInteger;
private MyInterface<Float> myFloat;
public MyInterfaceBean() {
myString = new MyString("String");
myInteger = new MyInteger(1);
myFloat = new MyInterface<Float>() {
private Float myValue;
public void setMyValue(Float value) {
this.myValue = value;
}
public Float getMyValue() {
return myValue;
}
@Override
public String toString() {
return Float.toString(myValue);
}
};
myFloat.setMyValue(3.1f);
}
public MyString getMyString() {
return myString;
}
public void setMyString(MyString myString) {
this.myString = myString;
}
public MyInteger getMyInteger() {
return myInteger;
}
public void setMyInteger(MyInteger myInteger) {
this.myInteger = myInteger;
}
public MyInterface<Float> getMyFloat() {
return myFloat;
}
public void setMyFloat(MyInterface<Float> myFloat) {
this.myFloat.setMyValue(myFloat.getMyValue());//not to lose this anonymous class, can substitute for other implementation directly
}
public String action() {
return null;
}
}
转换器：
@FacesConverter(value = "myStringConverter")
public class MyStringConverter implements Converter {
public Object getAsObject(FacesContext context, UIComponent component, String value) {
if(value == null || value.equals("")) {
return null;
}
MyString obj = new MyString(value);
return obj;
}
public String getAsString(FacesContext context, UIComponent component, Object value) {
if (!(value instanceof MyString) || (value == null)) {
return null;
}
return ((MyString)value).getMyValue();
}
}
和
@FacesConverter(value = "myIntegerConverter")
public class MyIntegerConverter implements Converter {
public Object getAsObject(FacesContext context, UIComponent component, String value) {
if(value == null || value.equals("")) {
return null;
}
MyInteger obj = null;
try {
Integer integer = Integer.valueOf(value);
obj = new MyInteger(integer);
} catch(NumberFormatException nfe) {
throw new ConverterException(new FacesMessage("Integer could not be parsed from string: " + value));
}
return obj;
}
public String getAsString(FacesContext context, UIComponent component, Object value) {
if (!(value instanceof MyInteger) || (value == null)) {
return null;
}
return ((MyInteger)value).getMyValue().toString();
}
}
和
@FacesConverter(value = "myFloatConverter")
public class MyFloatConverter implements Converter {
public Object getAsObject(FacesContext context, UIComponent component, String value) {
if(value == null || value.equals("")) {
return null;
}
MyInterface<Float> obj = null;
try {
Float floatValue = Float.valueOf(value);
obj = new MyInterface<Float>() {
private Float myValue;
public void setMyValue(Float value) {
this.myValue = value;
}
public Float getMyValue() {
return myValue;
}
@Override
public String toString() {
return Float.toString(myValue);
}
};
obj.setMyValue(floatValue);
} catch(NumberFormatException nfe) {
throw new ConverterException(new FacesMessage("Float could not be parsed from string: " + value));
}
return obj;
}
public String getAsString(FacesContext context, UIComponent component, Object value) {
if (!(value instanceof MyInterface) || (value == null)) {
if(!(((MyInterface)value).getMyValue() instanceof Float)) {
return null;
}
}
return ((MyInterface)value).getMyValue().toString();
}
}
观点：
<h:outputText value="String: #{myInterfaceBean.myString}"/>
<br/>
<h:outputText value="Integer: #{myInterfaceBean.myInteger}"/>
<br/>
<h:outputText value="Float: #{myInterfaceBean.myFloat}"/>
<br/>
<h:form>
<h:outputText value="String: "/><h:inputText value="#{myInterfaceBean.myString}" converter="myStringConverter"/>
<br/>
<h:outputText value="Integer: "/><h:inputText value="#{myInterfaceBean.myInteger}" converter="myIntegerConverter"/>
<br/>
<h:outputText value="Float: "/><h:inputText value="#{myInterfaceBean.myFloat}" converter="myFloatConverter"/>
<br/>
<h:commandButton value="Submit" action="#{myInterfaceBean.action}"/>
</h:form>