看“通過讀取 web.xml 文件中的配置參數連接數據庫”帖子後的想法

/**
 * @(#)CreateDBServlet.java
 *
 *
 * @author 
 * @version 1.00 2009/6/24
 */
package org.sunxin.lesson.jsp.bookstore;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.sql.*;
public class CreateDBServlet extends HttpServlet
{
	private String url;
	private String user;
	private String password;
	public void init()throws ServletException
	{
		String driverClass=getInitParameter("driverClass");
		url=getInitParameter("url");
		user=getInitParameter("user");
		password=getInitParameter("password");
		try{
			Class.forName(driverClass);
		}
		catch(ClassNotFoundException ce)
		{
			throw new UnavailableException("加載數據庫驅動失敗");
		}
	}    
	public void doGet(HttpServletRequest req,HttpServletResponse resp)
		throws ServletException,IOException
		{
			Connection conn=null;
			Statement stmt=null;
			try{
				conn=DriverManager.getConnection(url,user,password);
				stmt=conn.createStatement();
				stmt.executeUpdate("use bookstore");
				stmt.executeUpdate("create table bookinfo(id INT NOT NULL primary key,title VARCHAR(50) not null,author VARCHAR(50) not null,bookconcern VARCHAR(100) not null,publish_date DATE not null,price FLOAT(4,2) not null,amout SMALLINT,remark VARCHAR(200))ENGINE=InnoDB");
				//stmt.addBatch("insert into bookinfo values(1,'java從入門到精通','張三','張三出版社'.'2004-10-1',34.00,35,null)");
				stmt.addBatch("insert into bookinfo values(1,'jsp深入詳解','李四','李四出版社','2004-10-1',56.00,20,null)");
				stmt.addBatch("insert into bookinfo values(2,'jsp深入詳解','李四','李四出版社','2004-10-1',56.00,20,null)");
				stmt.addBatch("insert into bookinfo values(3,'J2EE高級編程','王五','王五出版社','2005-3-1',78.00,10,null)");
				stmt.addBatch("insert into bookinfo values(4,'jsp深入詳解','李四','李四出版社','2004-10-1',56.00,20,null)");
				stmt.addBatch("insert into bookinfo values(5,'jsp深入詳解','李四','李四出版社','2004-10-1',56.00,20,null)");
				stmt.addBatch("insert into bookinfo values(6,'jsp深入詳解','李四','李四出版社','2004-10-1',56.00,20,null)");
				stmt.executeBatch();
				PrintWriter out=resp.getWriter();
				out.println("success!");
				out.close();
			}
			catch(SQLException se)
			{
				se.printStackTrace();
			}
			finally
			{
				if(stmt!=null)
				{
					try{
						stmt.close();
					}
					catch(SQLException se)
					{
						se.printStackTrace();
					}
					stmt=null;
				}
				if(conn!=null)
				{
					try{
						conn.close();
					}
					catch(SQLException se)
					{
						se.printStackTrace();
					}
					conn=null;
				}
			}
		}
}

//stmt.addBatch("insert into bookinfo values(1,'java從入門到精通','張三','張三出版社'.'2004-10-1',34.00,35,null)");
大家看一下我註釋掉的這行是錯誤的。我的提交便不能全部成功。那就是出現了異常了吧。具體往下我就不知道了。不過將這樣的錯誤行改正就可以把白屏問題解決了。