Hi guys i have a data table in JSF which displays all of the contents of my
database table, it displays it fine, i also have a delete function that can successfully delete from the
database fine and updates the data table fine however when i try to update the
database i get the error
java.lang.IllegalArgumentException: Cannot convert richard.test.User@129d62a7 of type class richard.test.User to long
below is the code that i have been using to delete the rows in the
database that is working fine :
public void delete(long userID) {
PreparedStatement ps = null;
Connection con = null;
if (userID != 0) {
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
String sql = "DELETE FROM user1 WHERE userId=" + userID;
ps = con.prepareStatement(sql);
int i = ps.executeUpdate();
if (i > 0) {
System.out.println("Row deleted successfully");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
con.close();
ps.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
i simply wanted to edit the above code so it would update the records instead of deleting them so i edited it to look like :
public void editData(long userID) {
PreparedStatement ps = null;
Connection con = null;
if (userID != 0) {
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
String sql = "UPDATE user1 set name = '"+name+"', email = '"+ email +"', address = '"+address+"' WHERE userId=" + userID;
ps = con.prepareStatement(sql);
int i = ps.executeUpdate();
if (i > 0) {
System.out.println("Row updated successfully");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
con.close();
ps.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
and the xhmtl is :
<p:dataTable id="dataTable" var="u" value="#{userBean.getUserList()}"
paginator="true" rows="10"
editable="true"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
rowsPerPageTemplate="5,10,15">
<p:column>
<f:facet name="header">
User ID
</f:facet>
#{u.userID}
</p:column>
<p:column>
<f:facet name="header">
Name
</f:facet>
#{u.name}
</p:column>
<p:column>
<f:facet name="header">
Email
</f:facet>
#{u.email}
</p:column>
<p:column>
<f:facet name="header">
Address
</f:facet>
#{u.address}
</p:column>
<p:column>
<f:facet name="header">
Created Date
</f:facet>
#{u.created_date}
</p:column>
<p:column>
<f:facet name="header">
Delete
</f:facet>
<h:commandButton value="Delete" action="#{user.delete(u.userID)}" />
</p:column>
<p:column>
<f:facet name="header">
Delete
</f:facet>
<h:commandButton value="Edit" action="#{user.editData(u)}" />
</p:column>
currently when you press the edit button it will only update it with the same values as i haven't yet managed to get the datatable to be editable with the
database, i have seen a few examples with an array list where the data table gets its values from but never a
database so if you have any advice on this too it would be great
thanks
