在网上搜出一大把,各有各的说法,试了几个没成功的,我用的是XP+apache-tomcat-5.5.20.exe+jdk-1_5_0_10-nb-5_5-win.exe+mysql-5.0.26-win32.exe+mysql-connector-java-5.0.3-bin.jar
测试用的这个:
<!--首先导入一些必要的packages-->
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>
<!--告诉编译器使用SQL包-->
<%@ page import="java.sql.*"%>
<!--设置中文输出-->
<%@ page contentType="text/html; charset=GB2312" %><html>
<head>
<title>mySQL test</title>
</head>
<body>
<%
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/mysql?useUnicode=true&characterEncoding=GB2312";
String dbUser = "root"; //用户名
String dbPwd = ""; //密码
//建立数据库连接
//con = java.sql.DriverManager.getConnection(dbUrl, dbUser, dbPwd); String dbUrl ="jdbc:mysql://localhost:3306/mysql?user=root&password=abcd1001&useUnicode=true&characterEncoding=gb2312";
con = DriverManager.getConnection(dbUrl); //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 * from user"); //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);
String col4 = rs.getString(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>"); //关闭数据库连结
rs.close();
stmt.close();
con.close();
%>
</body>
</html>报错:root cause org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 14 in the jsp file: /testmysql.jsp
Generated servlet error:
com.mysql.jdbc.Driver cannot be resolved to a typeAn error occurred at line: 14 in the jsp file: /testmysql.jsp
Generated servlet error:
Duplicate local variable dbUrlJSP能用,估计是连接有问题.
测试用的这个:
<!--首先导入一些必要的packages-->
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>
<!--告诉编译器使用SQL包-->
<%@ page import="java.sql.*"%>
<!--设置中文输出-->
<%@ page contentType="text/html; charset=GB2312" %><html>
<head>
<title>mySQL test</title>
</head>
<body>
<%
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/mysql?useUnicode=true&characterEncoding=GB2312";
String dbUser = "root"; //用户名
String dbPwd = ""; //密码
//建立数据库连接
//con = java.sql.DriverManager.getConnection(dbUrl, dbUser, dbPwd); String dbUrl ="jdbc:mysql://localhost:3306/mysql?user=root&password=abcd1001&useUnicode=true&characterEncoding=gb2312";
con = DriverManager.getConnection(dbUrl); //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 * from user"); //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);
String col4 = rs.getString(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>"); //关闭数据库连结
rs.close();
stmt.close();
con.close();
%>
</body>
</html>报错:root cause org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 14 in the jsp file: /testmysql.jsp
Generated servlet error:
com.mysql.jdbc.Driver cannot be resolved to a typeAn error occurred at line: 14 in the jsp file: /testmysql.jsp
Generated servlet error:
Duplicate local variable dbUrlJSP能用,估计是连接有问题.
把mysql的驱动包放到web-inf/lib下面