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MyEclipse 下开发JSF教程(6) * Initial the properties of the class with null
* @param event
*/
public void initBook(ActionEvent event){
/*
* init the book object
*/
this.setBook(new Book());
}
Edit a book/**
* Get the book to edit and assign it to the bean
*
* @param event
*/
public void selectBook(ActionEvent event){
SimulateDB simulateDB = new SimulateDB();
/*
* Get the session map of the external context
*/
Map session = FacesContext.getCurrentInstance().getExternalContext().getSessionMap();
/*
* Find the UIParameter component by eXPression
*/
UIParameter component = (UIParameter) event.getComponent().findComponent("editId");
/*
* parse the value of the UIParameter component
*/
long id = Long.parseLong(component.getValue().toString());
/*
* get the book by id and set it in the local property
*/
this.setBook(simulateDB.loadBookById(id, session));
}
Save a book/**
* Add or update the book in the simulated database.
* If the book id is not set the book will be added
* otherwise the book will be updated
*
* @param event
*/
public void saveBook(ActionEvent event){
SimulateDB simulateDB = new SimulateDB();
/*
* Get the session map of the external context
*/
Map session = FacesContext.getCurrentInstance().getExternalContext().getSessionMap();
/*
* Add or update the book in the simulated database
*/
simulateDB.saveToDB(this.getBook(), session);
}
Delete a book/**
* Delete a book in the simulated database
*
* @param event
*/
public void deleteBook(ActionEvent event){
SimulateDB simulateDB = new SimulateDB();
/*
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