Drivermanager Cannot Resolved Error
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Drivermanager Cannot Be Resolved In Jsp
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Connection Cannot Be Resolved To A Type In Eclipse
the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Compilation error - com.mysql.jdbc.Driver driver cannot be resolved in eclipse cannot be resolved to a variable up vote 5 down vote favorite 1 I am barely familiar with pre-bundled STS. I am trying out JDBC for MySQL in Eclipse/Spring on Fedora 17 Downloaded the mysql JDBC drivers (mysql-connector-java-5.1.22-bin.jar). Then in the IDE Created a project and named it JDBC Created a folder called 'lib' under the project Went to Project > Properties . Selected the prepared statement cannot be resolved to a type in jsp Java Build Path, then selected the 'Libraries' tab. clicked on 'Add Jars' Selected JDBC > lib > mysql---.jar and clicked OK. This added under the Project Explorer pane a 'Referenced Libraries', under which I see the mysql jar file. Wrote the following code under the project I kind of thought I had done what was needed to compile. However, I am seeing Class.forName(com.mysql.jdbc.Driver); com.mysql.jdbc.Driver cannot be resolved to a variable Can you tell me what's wrong here. import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class TestJDBC { /** * @param args */ public static void main(String[] args) throws Exception{ // TODO Auto-generated method stub Connection connection = null; Statement statement = null; PreparedStatement preparedStatement = null; ResultSet resultSet = null; try { Class.forName(com.mysql.jdbc.Driver); connection = DriverManager.getConnection("jdbc:mysql://localhost/testdb?" + "user=myuser&password=mypwd"); if (connection != null) { System.out.println ("Connected may be?"); connection.close(); } else { System.out.println ("Not connected?"); } } catch (Exception e) { connection.close(); } } } java eclipse jdbc share|improve this question asked Dec 2 '12 at 15:08 rpat 119411 add a comment| 2 Answers 2 active oldest votes up vote 4 down vote accepted Class.forName("com.mysql.jdbc.Driver"); or Class.forName(com.mysql.jdbc.Driver.class.getName()); will work
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Driver Cannot Be Resolved Selenium
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Driver Cannot Be Resolved To A Variable Selenium
Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only http://stackoverflow.com/questions/13670536/compilation-error-com-mysql-jdbc-driver-cannot-be-resolved-to-a-variable takes a minute: Sign up Connection variable cannot be resolved up vote 1 down vote favorite 1 public class GestorBase{ public static void main(String[] args){ try { Class.forName("org.sqlite.JDBC"); } catch (ClassNotFoundException e) { System.out.println("Unable to load driver class"); // TODO: handle exception } try { Connection con = DriverManager.getConnection("jdbc:sqlite:db/Freepark.sqlite"); } catch (SQLException e) { // TODO Auto-generated catch block System.out.println("error http://stackoverflow.com/questions/4348103/connection-variable-cannot-be-resolved al buscar la base de datos"); } Statement sentencia = con.createStatement(); }} Eclipse says: "con" variable cannot be resolved to a type. Why? java variables scope share|improve this question edited Dec 3 '10 at 17:41 jjnguy 85.6k32223284 asked Dec 3 '10 at 17:22 Robert13 1116 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote con variable is local to try block , try { Connection con = DriverManager.getConnection("jdbc:sqlite:db/Freepark.sqlite"); } You are accessing con it out side of try block. It should be Connection con = null; Statement sentencia = null; try { con = DriverManager.getConnection("jdbc:sqlite:db/Freepark.sqlite"); sentencia = con.createStatement(); } catch (SQLException e) { // TODO Auto-generated catch block System.out.println("error al buscar la base de datos"); } catch (Exception ex){ //handle it } Have a look at variable scope and blocks share|improve this answer edited Dec 3 '10 at 18:08 answered Dec 3 '10 at 17:24 Jigar Joshi 159k27266332 And then you get an NPE if it fails.... –Tom Hawtin - tackline Dec 3 '10 at 18:01 @Tom Hawtin - tack li
This Site Careers Other all forums Forum: Beginning Java How to Resolve Java / MySql error: Driver loaded, https://coderanch.com/t/591404/java/java/Resolve-Java-MySql-error-Driver but cannot connect to db: jdbc:mysql://ecterra Matthew Blake Greenhorn http://www.webdeveloper.com/forum/showthread.php?208900-Why-Can-t-I-Connect-to-MySQL-with-JSP Posts: 10 posted 4 years ago I am finishing a program and I am having trouble getting the database to connect properly. I just completely removed and reinstalled MySQL so I don't think the error is caused by a cannot be bad password. Thanks for your help! The error I'm getting is: Driver loaded, but cannot connect to db: jdbc:mysql://localhost:3306/registrar Exception in thread "main" java.lang.NullPointerException at student.Undergraduate.add(Undergraduate.java:156) at student.StudentAppDriver.addStudent(StudentAppDriver.java:102) at student.StudentAppDriver.start(StudentAppDriver.java:30) at student.StudentAppDriver.main(StudentAppDriver.java:20) Code: /* * To change this template, choose Tools | Templates * and open the template in the cannot be resolved editor. */ package student; /** * * @author */ import java.sql.*; final class GetConnection { /** * Uses DriverManager. */ static Connection getSimpleConnection() { //See your driver documentation for the proper format of this string : String DB_CONN_STRING = "jdbc:mysql://localhost:3306/registar"; //Provided by your driver documentation. In this case, a MySql driver is used : String DRIVER_CLASS_NAME = "com.mysql.jdbc.Driver"; String USER_NAME = "root"; String PASSWORD = "root"; Connection result = null; try { Class.forName(DRIVER_CLASS_NAME).newInstance(); } catch (Exception ex) { log("Check classpath. Cannot load db driver: " + DRIVER_CLASS_NAME); } try { result = DriverManager.getConnection(DB_CONN_STRING, USER_NAME, PASSWORD); } catch (SQLException e) { log("Driver loaded, but cannot connect to db: " + DB_CONN_STRING); } return result; } private static void log(Object aObject) { System.out.println(aObject); } } Paul Clapham Sheriff Posts: 21440 33 I like... posted 4 years ago Matthew Blake wrote:Driver loaded, but cannot connect to db: jdbc:mysql://localhost:3306/reg
MySQL with JSP? If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 7 of 7 Thread: Why Can't I Connect to MySQL with JSP? Tweet Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 05-12-2009,10:34 AM #1 tgrk35 View Profile View Forum Posts Visit Homepage is crying... Join Date Jan 2005 Location USA Posts 352 Why Can't I Connect to MySQL with JSP? Here is the code I'm trying to use: Code: <% String mysql_DRIVER = "com.mysql.jdbc.Driver"; String mysql_USERNAME = "hre3oadmin"; String mysql_PASSWORD = "@Room15"; String mysql_STRING = "jdbc:mysql://10.10.100.200:3306/hreo_main_db"; Connection connection = null; Class.forName("com.mysql.jdbc.Driver").newInstance(); connection = DriverManager.getConnection(mysql_STRING,mysql_USERNAME,mysql_PASSWORD); if(!connection.isClosed()) out.println("Successfully connected to " + "MySQL server using TCP/IP..."); connection.close(); } catch(Exception ex){ out.println("Unable to connect to database."); } %> The error I get is as follows: HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to load class for JSP org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:156) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) javax.servlet.http.HttpServlet.service(H