book.java

一个完整的网上书店

package com.ascenttech.ebookstore.bean; 

import java.sql.*;
import java.util.*;

import com.ascenttech.ebookstore.shopcart.BookDetails;
import com.ascenttech.ebookstore.util.*;

public class Book {

    //data

    private String isbn;
    private String title;
    private String author;
    private float price;
    private boolean exist = false;
    private int count=0;

    // method
    public Book(String isbn, String title, float price) {
      this.isbn = isbn;
      this.title = title;
      this.price = price;
      this.count=0;
    }
    
    //constructor
    public Book() {
    
    }

    // getXXX()/setXXX(){}
    public String getIsbn(){return this.isbn;}
    public String getTitle(){return this.title;}
    public String getAuthor(){return this.author;}
    public float getPrice(){return this.price;}
    public boolean getExist(){return this.exist;}
    public int getCount(){return this.count;}

    public void setIsbn(String isbn){this.isbn = isbn;}
    public void setTitle(String title){this.title = title;}
    public void setAuthor(String author){this.author = author;}
    public void setPrice(float price) {this.price = price;}
    public void setExist(boolean exist){this.exist=exist;}
    public void setCount(int count){this.count = count;}


    public BookDetails findBookByISBN(String isbn) throws SQLException {
        Connection con = DataAccess.getConnection();
        String sql = "select * from ebs_book where isbn='"
                     + isbn+"'";
        Statement stmt = con.createStatement();
        ResultSet rs = stmt.executeQuery(sql);
        BookDetails book=null;
        while (rs.next()){
          book=new BookDetails();
          book.setIsbn(rs.getString("isbn"));
          book.setTitle(rs.getString("title"));
          book.setAuthor(rs.getString("author"));
          book.setPrice(rs.getFloat("price"));
        }

        rs.close();
        stmt.close();
        con.close();

        return book;

    }
    
    public Collection findBookByAuthor(String author) throws SQLException{

        Connection con = DataAccess.getConnection();
        String sql = "select * from ebs_book where author='"
                      + author+"'";
        Statement stmt = con.createStatement();
        ResultSet rs = stmt.executeQuery(sql);
        Book book=null;
        Collection b = new ArrayList();
        while (rs.next()){
          if(!this.exist) this.setExist(true);
          book = new Book();
          book.setIsbn(rs.getString("isbn"));
          book.setTitle(rs.getString("title"));
          book.setAuthor(rs.getString("author"));
          book.setPrice(rs.getFloat("price"));
          b.add(book);
         }
         rs.close();
         stmt.close();
         con.close();
         return b;

    }

    public Collection findBookByKeywords(String keyword){
      Connection con = DataAccess.getConnection();
      String  sql="select * from ebs_book where title like '%"+keyword+ "%'";
      Statement stmt = null;
      try {
        stmt = con.createStatement();
      }
      catch (SQLException ex) {
    	  ex.printStackTrace();
      }
      ResultSet rs = null;
      try {
        rs = stmt.executeQuery(sql);
      }
      catch (SQLException ex1) {
    	  ex1.printStackTrace();
      }
      Book book=null;
	  Collection b = new ArrayList();
	  try {
	   while (rs.next()) {
	    if (!this.exist) {
	      this.setExist(true);
	    }
	    book = new Book();
	    book.setIsbn(rs.getString("isbn"));
	    book.setTitle(rs.getString("title"));
	    book.setAuthor(rs.getString("author"));
	    book.setPrice(rs.getFloat("price"));
	
	    b.add(book);
	   }
	
	  }
	  catch (SQLException ex2) {
		ex2.printStackTrace();
	  }

      return b;
    }

  
}