}

/*

* 释放资源 */

public void closeAll(){ }

try { }

if(rs != null){ }

if(ps != null){ }

if(conn != null){ }

e.printStackTrace(); conn = null; ps = null; rs = null;

conn.close(); ps.close(); rs.close();

} catch (SQLException e) { }finally{

2. 实体类代码：

package com.book.entity;

public class Book {

private String book_publishTime; private String book_synopsis; private double book_price; private String book_author; private String book_num; private String book_name; private int book_id;