66、Java Web应用开发：从基础到高级特性

Java Web应用开发：从基础到高级特性

1. JavaServer Faces (JSF) 中的推荐显示逻辑

在JavaServer Faces (JSF) 应用中，存在一段代码用于根据用户的选择来显示书籍推荐。以下是相关代码逻辑的详细解释：

int numSelected = getSessionBean1().getNumSelections();
Properties selections = getSessionBean1().getSelections();
Enumeration<String> selectionsEnum = selections.keys();

Option [] recommendations;
// if at least one selection was made
if ( numSelected > 0 )
{
    recommendations = new Option[ numSelected ];
    for ( int i = 0; i < numSelected; i++ )
    {
        String language = (String) selectionsEnum.nextElement();
        recommendations[ i ] = new Option( language +
                " How to Program. ISBN#: " +
                selections.getProperty( language ) );
    } // end for
}