如何将Spring bean注入JSF转换器

Question

我需要将Spring bean注入JSF(Primefaces)转换器.我尝试使用EL解析器注入豆子.但是,豆子null在转换器内部.

我的JSF转换器:

public class DepartmentConverter implements Converter  {
    private DepartmentService departmentService;
    //getter setter for this property

    @Override
    public Object getAsObject(FacesContext arg0, UIComponent arg1, String arg2) {
        //codes
    }

    @Override
    public String getAsString(FacesContext arg0, UIComponent arg1, Object arg2) {
        //Codes
    }
}

faces-config.xml:

<converter>
    <converter-id>DepartmentConverter</converter-id>
    <converter-class>com.studinfo.jsf.converter.DepartmentConverter</converter-class>
    <property>
        <property-name>departmentService</property-name>
        <property-class>com.studinfo.services.DepartmentService</property-class>
        <default-value>#{DepartmentService}</default-value>
    </property>
</converter>

EL解析器:

<application>
    <el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
</application>

当我调试我的代码时,departmentService属性是null.我可以以相同的方式访问托管JSF bean中的Spring bean.

Answer 1

直到JSF 2.3,转换器都没有注入目标.将转换器改为JSF或Spring托管bean.以下示例使其成为JSF托管bean:

@ManagedBean
@RequestScoped
public class DepartmentConverter implements Converter  {
    // ...
}

而#{departmentConverter}不是使用它DepartmentConverter.

例如

<h:inputSome ... converter="#{departmentConverter}" />

要么

<h:someComponent>
    <f:converter binding="#{departmentConverter}" />
</h:someComponent>

不要忘记删除<converter>from faces-config.xml(如果您使用了@FacesConverter注释,那么它本身已经没有必要了,但除此之外).