MySql:eclipse连接

 1、在官网下载jar包，下载下来的是一个安装文件，正常点击安装就可以

<span style="color:#3333ff;">import java.sql.*;

public class TestMySql {

public static void main(String[] args) {
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver");//创建实例

conn = DriverManager
.getConnection("jdbc:mysql://localhost:3306/test_db","root",密码);
stmt = conn.createStatement();
rs = stmt.executeQuery("select * from dept");
while (rs.next()) {
//System.err.println(rs.getInt("id")+rs.getString("name")+rs.getInt("deptnum"));
System.err.println(rs.getInt(1)+rs.getString(2)+rs.getInt(3));
}

} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException ex) {
// handle any errors
System.out.println("SQLException: " + ex.getMessage());
System.out.println("SQLState: " + ex.getSQLState());
System.out.println("VendorError: " + ex.getErrorCode());
} finally {
try {
if(rs != null) {
rs.close();
rs = null;
}
if(stmt != null) {
stmt.close();
stmt = null;
}
if(conn != null) {
conn.close();
conn = null;
}
} catch (SQLException e) {
e.printStackTrace();
}
}

}
}
</span>