JSP连接MYSQL,源代码和出错提示如下:

wynton 2006-04-15 11:54:54

<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>

<%@ page import="java.sql.*"%>

<%@ page contentType="text/html; charset=GB2312" %>

<html>
<head>
<title>DbJsp.jsp</title>
</head>
<body>
<%
//以try开始
try
{
Connection con;
Statement stmt;
ResultSet rs;
//加载驱动程序，下面的代码为加载MySQL驱动程序
Class.forName("com.mysql.jdbc.Driver");
//注册MySQL驱动程序
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
//用适当的驱动程序连接到数据库
String dbUrl = "jdbc:mysql://localhost:3306/BookDB?useUnicode=true&characterEncoding=GB2312";

String dbUser="dbuser";
String dbPwd="1234";
//建立数据库连接
con = java.sql.DriverManager.getConnection(dbUrl,dbUser,dbPwd);
//创建一个JDBC声明
stmt = con.createStatement();
//增加新记录
stmt.executeUpdate("INSERT INTO books (id,name,title,price) VALUES ('999','Tom','Tomcat Bible',44.5)");
//查询记录
rs = stmt.executeQuery("SELECT id,name,title,price from books");
//输出查询结果
out.println("<table border=1 width=400>");
while (rs.next())
{
String col1 = rs.getString(1);
String col2 = rs.getString(2);
String col3 = rs.getString(3);
float col4 = rs.getFloat(4);
//打印所显示的数据
out.println("<tr><td>"+col1+"</td><td>"+col2+"</td><td>"+col3+"</td><td>"+col4+"</td></tr>");
}
out.println("</table>");

//删除新增加的记录
stmt.executeUpdate("DELETE FROM books WHERE id='999'");

//关闭数据库连结
rs.close();
stmt.close();
con.close();
}

//捕获错误信息
catch (Exception e) {out.println(e.getMessage());}
%>
</body>
</html>

错误信息如下:

Communication link failure: java.io.IOException, underlying cause: Unexpected end of input stream ** BEGIN NESTED EXCEPTION ** java.io.IOException MESSAGE: Unexpected end of input stream STACKTRACE: java.io.IOException: Unexpected end of input stream at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:1096) at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:626) at com.mysql.jdbc.Connection.createNewIO(Connection.java:1562) at com.mysql.jdbc.Connection.(Connection.java:491) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346) at java.sql.DriverManager.getConnection(DriverManager.java:525) at java.sql.DriverManager.getConnection(DriverManager.java:171) at org.apache.jsp.DbJsp_jsp._jspService(org.apache.jsp.DbJsp_jsp:75) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) ** END NESTED EXCEPTION **

谢谢啦!!!!!

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andyyang007 2006-04-15

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看首先你的驅動包版本是不是對的。URL是否OK, 先用最簡單的試試。。

wsk_228 2006-04-15

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com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:1096) at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:626) at com.mysql.jdbc.Connection.createNewIO(Connection.java:1562) at com.mysql.jdbc.Connection.(Connection.java:491) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346) at java.sql.DriverManager.getConnection(DriverManager.java:525) at java.sql.DriverManager.getConnection(DriverManager.java:171) at