先说一说的,我的系统还有MYSQL的JDBC都已经配置好了、、、
系统变量:
CLSSPATH=D:\progarm two\mysql-connector-java-5.0.5\mysql-connector-java-5.0.5-bin.jar;C:\Program Files\Java\jdk1.6.0_12\bin;
用户变量为:
classpath=.;.;d:\PROGAR~2\JMF\lib\sound.jar;d:\PROGAR~2\JMF\lib\jmf.jar;d:\PROGAR~2\JMF\lib;%JAVA_HOME%\lib\tools.jar;%JAVA_HOME%\lib\dt.jar;.;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar;D:\progarm two\mysql-connector-java-5.0.5\mysql-connector-java-5.0.5-bin.jar;
驱动的位置:
D:\progarm two\mysql-connector-java-5.0.5\mysql-connector-java-5.0.5.jar;
配置的ODBC:
Date Source Name :Mysql_Test
Databese:test
代码为:
- PHP code
public class Main { public static void main(String[] args) { //驱动程序名 String driver = "com.mysql.jdbc.Driver"; //URL指向要访问的数据库名字: String url = "jdbc:mysql://localhost/Mysql_test"; //Mysql配置用户名: String user = "root"; //Mysql配置密码: String password = "LJZKID"; try { //加载驱动程序 Class.forName(driver); } catch (ClassNotFoundException ex) { Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex); } try { //连接数据库 Connection con = DriverManager.getConnection(url, user, password); if(!con.isClosed()) System.out.println("Succeeded connecting to the Database!"); //statement用来执行SQL语言 Statement st = con.createStatement(); //要执行的SQL语言 String sql = "select * from tablename"; //结果集 ResultSet rs = (ResultSet)(Statement) st.executeQuery(sql); while( rs.next() ) { //选择col这列数据 String name = rs.getString("col1"); System.out.println("name=" +name ); } rs.close(); con.close(); } catch (SQLException ex) { Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex); } }}
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不清楚你现在是报什么错误,你把异常贴出来看看
从你代码import的东西也不太清楚,里面ResultSet rs = (ResultSet)(Statement) st.executeQuery(sql)是完全没有必要强制类型转换
直接ResultSet rs = st.executeQuery(sql)就OK的
你先把异常贴出来,然后import内容也贴出来再讨论吧
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如以下odbc连接mysql的代码:
1.public static void main(String[] args)
2.{
3.Connection connection = null;
4.Statement statement;
5.ResultSet resultSet;
6.// 加载驱动程序以连接数据库
7.try
8.{
9.Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");//这个驱动不能是其他的..
10.connection = DriverManager.getConnection("jdbc:odbc:user","root","123"); //user是data Source ,root是用
11.
12.//户名,123是进入mysql的密码
13.System.out.println("open easy");
14.String query = "Select * from userrole";
15.statement = connection.createStatement();
16.resultSet = statement.executeQuery( query );
17.connection.close();
18.System.out.println("close easy");
19.
20.}
21.// 捕获加载驱动程序异常
22.catch ( ClassNotFoundException cnfex )
23.{
24.System.err.println(
25."装载 JDBC/ODBC 驱动程序失败。" );
26.cnfex.printStackTrace();