package test
import java.sql.*
public class infoBean{
private String ab="sun.jdbc.odbc.JdbcOdbcDriver"
private String ac="JDBC:odbc:info.mdb"
Connection conn=null
ResultSet rs=null
Statement stmt
public infoBean(){
try{
Class.forName(ab)}
catch(java.lang.ClassNotFoundException e){
System.out.println("infoBean():"+e.getMessage())}
}
public ResultSet executeQuery(String sql){
rs=null
try{
conn=DriverManager.getConnection(ac)
stmt=conn.createStatement()
rs = stmt.executeQuery(sql)}
catch(SQLException ex){
System.err.println("aq.executeQuery:"+ex.getMessage())}
return rs
}
public void executeUpdate(String sql)
{stmt=null
rs=null
try{
conn=DriverManager.getConnection(ac)
stmt=conn.createStatement()
stmt.executeUpdate(sql)
stmt.close()
conn.close()}
catch(SQLException e1)
{System.err.println("executeUpdate:" + e1.getMessage())}
}
public void closeStmt()
{
try{
stmt.close()
}
catch (SQLException e2)
{
e2.printStackTrace()
}
}
public void closeConn()
{
try{
conn.close()
}
catch (SQLException e3)
{
e3.printStackTrace()
}
}
}
在jsp页面中引用时，显示数据库内容：
<%@ page contentType="text/htmlcharset=GB2312" import="java.sql.*" %>
<jsp:useBean id="inBean" class="test.infoBean" scope="page"/><html><head></head><body><table>
<tr><th>11</th><th>11</th></tr>
<%
ResultSet rs=inBean.executeQuery("SELECT * FROM student")
while rs.next(){
%>
<tr><td><%=rs.getString(1)%></td><td><%=rs.getString(2)%></td></tr>
<%}%>
</table></body></html>
在jsp中删除，
<%@ page contentType="text/htmlcharset=GB2312" import="java.sql.*" %>
<jsp:useBean id="inBean" class="test.infoBean" scope="page"/><html><head></head><body>
<%
String id=request.getParameter("id")
inBean.executeUpdate("Delete from student where id='"+id+"'")
%>
</body></html>
其中id是上一个页面传过来的；
jsp中修改：
<%@ page contentType="text/htmlcharset=GB2312" import="java.sql.*" %>
<jsp:useBean id="inBean" class="test.infoBean" scope="page"/><html><head></head><body>
<%
String id=request.getParameter("id")
String name=request.getParameter("name")
inBean.executeUpdate("update student set name='"+name+"' where id='"+id+"'")
%>
</body></html>
我还有javaBean连接mysql，sql server的例子，也有关于javaBean完整简单的小项目，你要的话，给邮箱，发给你
你现在mysql中执行下select * from user
看能查出数据不~
再把System.out.println(s)
放在s=rs.getString("name")下面 看输出来的 都是什么
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