Databases
StackOverflow2013
Postsdbo
POUsing GWT with mysql
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POUsing GWT with mysql
    primarykey
    data
    text
    <p>I am new to GWT. I am trying to connect with a mysql server in it.</p> <p>Following is my project hierarchy:</p> <p>Project name is <code>hello</code> and package name is <code>com.hello</code>. By default GWT creates 3 folders that are</p> <ol> <li>com.hello.client</li> <li>com.hello.server</li> <li>com.hello.shared</li> </ol> <p>The main java file that contains entry point for GWT is in the com.hello.client folder by name of hello.java</p> <p>I have created a class db_conn (file name is db_conn.java) which contains all the required code to connect with mysql database. This file is placed in <code>com.hello.server</code> folder. Following is the code</p> <pre><code>package com.hello.server; import java.sql.Connection; import java.sql.DriverManager; public class db_conn { public Connection con; public db_conn() { } public String ConnectToDB() { try { String host = "localhost"; String db = "test"; String driver = "com.mysql.jdbc.Driver"; String user = "root"; String pass = "pwd"; Class.forName(driver).newInstance(); con = DriverManager.getConnection(host+db, user, pass); return "Connected to Database"; } catch(Exception ex) { return ex.toString(); } } } </code></pre> <p>In hello.java file (which is in com.hello.client folder and contains the main entry point for GWT) I have imported above class by <code>import com.hello.server.*;</code></p> <p>When I am trying to use the <code>ConnectToDB()</code> function from the <code>db_conn</code> class on <code>onModuleLoad()</code> in hello.java, it is giving me the following error:</p> <p><code>com.hello.server.db_conn can not be found in source packages. Check the inheritance chain from your module; it may not be inheriting a required module or a module may not be adding its source path entries properly.</code></p> <p>The code snippet window shows the db_conn class but when I use this class, it gives me error. I am not able to figure out the exact problem. Please help.</p> <p>Thanks</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USVinod Maurya
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POUsing GWT with mysql
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POUsing GWT with mysql
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POUsing GWT with mysql
      1. USprayagupd
      1. VTFavorite
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload