Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String url="jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ="d:\\nfs\\database\\nfs.mdb"; con =DriverManager.getConnection(url,"admin","12345678");
Use JDBC for your classload database's driver.
我目前就是用的ACCESS,如果数据量小的话,数据拷贝是很方便的。
按照各位的提示,写了下面代码。 <html> <body> <% try{ //Load JDBC driver Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); //注意DBQ的写法 String url = "jdbc:odbc:driver={Microsoft Access Driver(*.mdb)};DBQ=C:\\Award.mdb"; con = DriverManager.getConnection(url,"",""); stmt = con.createStatement(); String query = "select * from award"; ResultSet rs = stmt.executeQuery(query); while(rs.next()) { String str = rs.getString("awardID"); out.print(str); } } catch(Exception e) { e.printStackTrace(); } %> </body> </html>但是报错:HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 1 in the jsp file: /JspProject/data.jspGenerated servlet error: [javac] Compiling 1 source fileC:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:10: cannot resolve symbol symbol : class Connection location: class org.apache.jsp.JspProject.data_jsp Connection con; ^An error occurred at line: 1 in the jsp file: /JspProject/data.jspGenerated servlet error: C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:11: cannot resolve symbol symbol : class Statement location: class org.apache.jsp.JspProject.data_jsp Statement stmt; ^An error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error: C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:50: cannot resolve symbol symbol : variable DriverManager location: class org.apache.jsp.JspProject.data_jsp con = DriverManager.getConnection(url,"",""); ^An error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error: C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:53: cannot resolve symbol symbol : class ResultSet location: class org.apache.jsp.JspProject.data_jsp ResultSet rs = stmt.executeQuery(query); ^ 4 errors org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127) org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351) org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415) org.apache.jasper.compiler.Compiler.compile(Compiler.java:458) org.apache.jasper.compiler.Compiler.compile(Compiler.java:439) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:552) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248) javax.servlet.http.HttpServlet.service(HttpServlet.java:856) note The full stack trace of the root cause is available in the Tomcat logs. --------------------------------------------------------------------------------Apache Tomcat/5.0.16哪位兄弟帮我看一看?
加了还是不行。报错: HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error: [javac] Compiling 1 source fileC:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:48: cannot resolve symbol symbol : variable con location: class org.apache.jsp.JspProject.data_jsp con = DriverManager.getConnection(url,"",""); ^An error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error: C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:49: cannot resolve symbol symbol : variable stmt location: class org.apache.jsp.JspProject.data_jsp stmt = con.createStatement(); ^An error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error: C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:49: cannot resolve symbol symbol : variable con location: class org.apache.jsp.JspProject.data_jsp stmt = con.createStatement(); ^An error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error: C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:51: cannot resolve symbol symbol : variable stmt location: class org.apache.jsp.JspProject.data_jsp ResultSet rs = stmt.executeQuery(query); ^ 4 errors org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127) org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351) org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415) org.apache.jasper.compiler.Compiler.compile(Compiler.java:458) org.apache.jasper.compiler.Compiler.compile(Compiler.java:439) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:552) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248) javax.servlet.http.HttpServlet.service(HttpServlet.java:856) note The full stack trace of the root cause is available in the Tomcat logs. --------------------------------------------------------------------------------Apache Tomcat/5.0.16
可以自己写类去拿connection
在JSP中访问数据库大全 现在有好多初学jsp的网友经常会问数据库怎么连接啊,怎么老出错啊?所以我集中的在这写篇文章供大家参考,其实这种把数据库逻辑全部放在jsp里未必是好的做法,但是有利于初学者学习,所以我就这样做了,当大家学到一定程度的时候,可以考虑用MVC的模式开发。在练习这些代码的时候,你一定将jdbc的驱动程序放到服务器的类路径里,然后要在数据库里建一个表test,有两个字段比如为test1,test2,可以用下面SQL建 create table test(test1 varchar(20),test2 varchar(20),然后向这个表写入一条测试纪录,那么现在开始我们的jsp和数据库之旅吧。
一、jsp连接Oracle8/8i/9i数据库(用thin模式)
testoracle.jsp如下:
<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<html>
<body>
<%Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
String url="jdbc:oracle:thin:@localhost:1521:orcl";
//orcl为你的数据库的SID
String user="scott";
String password="tiger";
Connection conn= DriverManager.getConnection(url,user,password);
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
String sql="select * from test";
ResultSet rs=stmt.executeQuery(sql);
while(rs.next()) {%>
您的第一个字段内容为:<%=rs.getString(1)%>
您的第二个字段内容为:<%=rs.getString(2)%>
<%}%>
<%out.print("数据库操作成功,恭喜你");%>
<%rs.close();
stmt.close();
conn.close();
%>
</body>
</html> 二、jsp连接Sql Server7.0/2000数据库
testsqlserver.jsp如下:
<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<html>
<body>
<%Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=pubs";
//pubs为你的数据库的
String user="sa";
String password="";
Connection conn= DriverManager.getConnection(url,user,password);
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
String sql="select * from test";
ResultSet rs=stmt.executeQuery(sql);
while(rs.next()) {%>
您的第一个字段内容为:<%=rs.getString(1)%>
您的第二个字段内容为:<%=rs.getString(2)%>
<%}%>
<%out.print("数据库操作成功,恭喜你");%>
<%rs.close();
stmt.close();
conn.close();
%>
</body>
</html> 三、jsp连接DB2数据库
testdb2.jsp如下:
<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<html>
<body>
<%Class.forName("com.ibm.db2.jdbc.app.DB2Driver ").newInstance();
String url="jdbc:db2://localhost:5000/sample";
//sample为你的数据库名
String user="admin";
String password="";
Connection conn= DriverManager.getConnection(url,user,password);
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE);
String sql="select * from test";
ResultSet rs=stmt.executeQuery(sql);
while(rs.next()) {%>
您的第一个字段内容为:<%=rs.getString(1)%>
您的第二个字段内容为:<%=rs.getString(2)%>
<%}%>
<%out.print("数据库操作成功,恭喜你");%>
<%rs.close();
stmt.close();
conn.close();
%>
</body>
</html> 四、jsp连接Informix数据库
testinformix.jsp如下:
<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<html>
<body>
<%Class.forName("com.informix.jdbc.IfxDriver").newInstance();
String url =
"jdbc:informix-sqli://123.45.67.89:1533/testDB:INFORMIXSERVER=myserver;
user=testuser;password=testpassword";
//testDB为你的数据库名
Connection conn= DriverManager.getConnection(url);
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
String sql="select * from test";
ResultSet rs=stmt.executeQuery(sql);
while(rs.next()) {%>
您的第一个字段内容为:<%=rs.getString(1)%>
您的第二个字段内容为:<%=rs.getString(2)%>
<%}%>
<%out.print("数据库操作成功,恭喜你");%>
<%rs.close();
stmt.close();
conn.close();
%>
</body>
</html> 五、jsp连接Access数据库
<%@page import="java.sql.*"
import ="java.util.*"
import ="java.io.*"
import="java.text.*"
contentType="text/html; charset=gb2312"
buffer="20kb"
%><%! int all,i,m_count;
String odbcQuery;
Connection odbcconn;
Statement odbcstmt;
ResultSet odbcrs;
String username,title,content,work,email,url,time,date;
String datetime;
%>
<%
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
}catch (ClassNotFoundException e)
{ out.print ("驱动程序不存在");
}
try{
odbcconn = DriverManager.getConnection("jdbc:odbc:db1");
odbcstmt = odbcconn.createStatement();
odbcQuery="Select * From book where datetime>2001-4-26 Order By datetime DESC";
odbcrs=odbcstmt.executeQuery(odbcQuery);
int i=0;
while (i<130) odbcrs.next();
while (odbcrs.next())
{
//*/////////////////////////显示数据库的内容用于调试程序是用//
int ii;
try{
try{
for (ii=1;;ii++)
out.print ("<br>Cloumn "+ii+" is: "+odbcrs.getString(ii));
}catch (NullPointerException e) {
out.print ("有空的指针");
}
}catch (SQLException e){
}
}
odbcrs.close();
odbcstmt.close();
odbcconn.close();
}catch (SQLException e)
{ out.print (e);
}
%>
String url="jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ="d:\\nfs\\database\\nfs.mdb";
con =DriverManager.getConnection(url,"admin","12345678");
<html>
<body>
<%
try{
//Load JDBC driver
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
//注意DBQ的写法
String url = "jdbc:odbc:driver={Microsoft Access Driver(*.mdb)};DBQ=C:\\Award.mdb";
con = DriverManager.getConnection(url,"","");
stmt = con.createStatement();
String query = "select * from award";
ResultSet rs = stmt.executeQuery(query);
while(rs.next())
{
String str = rs.getString("awardID");
out.print(str);
}
}
catch(Exception e)
{
e.printStackTrace();
}
%>
</body>
</html>但是报错:HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 1 in the jsp file: /JspProject/data.jspGenerated servlet error:
[javac] Compiling 1 source fileC:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:10: cannot resolve symbol
symbol : class Connection
location: class org.apache.jsp.JspProject.data_jsp
Connection con;
^An error occurred at line: 1 in the jsp file: /JspProject/data.jspGenerated servlet error:
C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:11: cannot resolve symbol
symbol : class Statement
location: class org.apache.jsp.JspProject.data_jsp
Statement stmt;
^An error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error:
C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:50: cannot resolve symbol
symbol : variable DriverManager
location: class org.apache.jsp.JspProject.data_jsp
con = DriverManager.getConnection(url,"","");
^An error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error:
C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:53: cannot resolve symbol
symbol : class ResultSet
location: class org.apache.jsp.JspProject.data_jsp
ResultSet rs = stmt.executeQuery(query);
^
4 errors
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:458)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:552)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
note The full stack trace of the root cause is available in the Tomcat logs.
--------------------------------------------------------------------------------Apache Tomcat/5.0.16哪位兄弟帮我看一看?
只求兄弟们给一个不用配置ODBC,就能操纵数据库的完整范例。Access
数据库:C:\Award.mdb
表名:award
字段名:awardID、content、note、iswine不胜感激!
<%@ page import="java.sql.*"%>
HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error:
[javac] Compiling 1 source fileC:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:48: cannot resolve symbol
symbol : variable con
location: class org.apache.jsp.JspProject.data_jsp
con = DriverManager.getConnection(url,"","");
^An error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error:
C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:49: cannot resolve symbol
symbol : variable stmt
location: class org.apache.jsp.JspProject.data_jsp
stmt = con.createStatement();
^An error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error:
C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:49: cannot resolve symbol
symbol : variable con
location: class org.apache.jsp.JspProject.data_jsp
stmt = con.createStatement();
^An error occurred at line: 6 in the jsp file: /JspProject/data.jspGenerated servlet error:
C:\Tomcat\work\Catalina\localhost\_\org\apache\jsp\JspProject\data_jsp.java:51: cannot resolve symbol
symbol : variable stmt
location: class org.apache.jsp.JspProject.data_jsp
ResultSet rs = stmt.executeQuery(query);
^
4 errors
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:458)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:552)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
note The full stack trace of the root cause is available in the Tomcat logs.
--------------------------------------------------------------------------------Apache Tomcat/5.0.16
<%@ page import="java.sql.*"%>2、在使用前声明:Connecttion con = DriverManager.getConnection(url,"","");
Statement stmt = con.createStatement();
...
<%@ page import="java.sql.*"%>
<html>
<body>
<%
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url = "jdbc:odbc:driver={Microsoft Access Driver(*.mdb)};DBQ=C:\\award.mdb";
Connection con = DriverManager.getConnection(url,"","");
Statement stmt = con.createStatement();
String query = "select * from award";
ResultSet rs = stmt.executeQuery(query);
while(rs.next())
{
String str = rs.getString("awardID");
out.print(str);
}
}
catch(Exception e)
{
e.printStackTrace();
}
%>
</body>
</html>
<%@ page contentType="text/html;charset=gb2312"%>
<%@ page import="java.sql.*"%>
<html>
<body>
<%
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url = "jdbc:odbc:driver={Microsoft Access Driver(*.mdb)};DBQ=C:\\award.mdb";
Connection con = DriverManager.getConnection(url,"","");
Statement stmt = con.createStatement();
String query = "select * from award";
ResultSet rs = stmt.executeQuery(query);
if (!rs.next())
{
%>
<tr>
<td>The result is: </td>
<td><%=rs.getString("awardID") %> </td>
</tr> <%
}
}
catch(Exception e)
{
e.printStackTrace();
}
%>
</body>
</html>
{}
还是没反应。
但问题是那段代码完全没有结果显示出来。
靠!