I am Pradeep Kundu. I am making a program in struts in which i want to access data from MySQL through struts. I am using Strut 1.3.8 , Netbean 6.7.1 and MySQL 5.5. In this program ,I want to insert, delete & search data. In insert statement , i take a number variabe with long Data Type. I found this error
java.lang.integer cannot be cast into java.lang.long
In delete page , My program is deliting data successfully but not giving any response.
In search page , when i click submit button , other page open but blanks.
These are my action classes code
InserDataAction.java
package com.myapp.struts;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.DynaActionForm;
public class InsertDataAction extends org.apache.struts.action.Action {
/* forward name="" path="" */
private static final String SUCCESS = "success";
private static final String FAILURE = "failure";
Connection con = null;
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
ActionErrors errors = new ActionErrors();
DynaActionForm actionForm = (DynaActionForm) form;
int userId = (Integer) actionForm.get("userId");
String firstName = (String) actionForm.get("firstName");
String lastName = (String) actionForm.get("lastName");
int age = (Integer) actionForm.get("age");
long number = (Long) actionForm.get("number");
long size = Long.toString(number).length();
boolean flag1 = false;
boolean flag2 = false;
if (userId == 0 ) {
errors.add("userId", new ActionMessage("error.userId.required"));
}
if (firstName == null || firstName.length() < 1) {
errors.add("firstName", new ActionMessage("error.firstName.required"));
}
if (lastName == null || lastName.length() < 1) {
errors.add("lastName", new ActionMessage("error.lastName.required"));
}
if (age == 0 || age < 16) {
errors.add("age", new ActionMessage("error.age.required"));
}
if (number==0 || size < 10) {
errors.add("number", new ActionMessage("error.number.required"));
}
saveErrors(request, errors);
if (errors.isEmpty()) {
flag1 = true;
} else {
flag1 = false;
}
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection("jdbc:mysql:///employee", "root", "1234");
if (!con.isClosed()) {
PreparedStatement ps = (PreparedStatement) con.prepareStatement("INSERT INTO emp(`userId`,`firstName`,`lastName`,age,`number`)"
+ " VALUES (?,?,?,?,?) ");
ps.setInt(1, userId);
ps.setString(2, firstName);
ps.setString(3, lastName);
ps.setInt(4, age);
ps.setLong(5, number);
ps.execute();
} else {
errors.add("SQL", new ActionMessage("error.SQLConnectivity"));
}
}
catch (Exception ex) {
errors.add("SQLException", new ActionMessage("error.SQLException"));
throw new SQLException(ex.fillInStackTrace());
} finally {
try {
if (con != null) {
con.close();
}
} catch (SQLException e) {
throw new SQLException(e.getSQLState() + e.fillInStackTrace());
}
}
saveErrors(request, errors);
if (errors.isEmpty()) {
flag2 = true;
} else {
flag2 = false;
}
if (flag1 == true && flag2 == true) {
return mapping.findForward(SUCCESS);
} else {
return mapping.findForward(FAILURE);
}
}
}
DeleteDataForm.java
package com.myapp.struts;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
/**
* @author pradeep.kundu
*/
public class DeleteDataForm extends org.apache.struts.action.ActionForm {
Connection con = null;
int n;
int userId;
public int getuserId() {
return userId;
}
public void setuserId(int userId) {
this.userId = userId;
}
public DeleteDataForm() {
super();
}
@Override
public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
ActionErrors errors = new ActionErrors();
if (getuserId()==0 || getuserId() < 1) {
errors.add("userId", new ActionMessage("error.userId.required"));
}
try {
String str = "DELETE from emp where userId =?";
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection("jdbc:mysql:///employee", "root", "1234");
if (!con.isClosed()) {
PreparedStatement ps = (PreparedStatement) con.prepareStatement(str);
ps.setInt(1, userId);
n = ps.executeUpdate();
if(n!=0){
System.out.println("Record is deleted");
} else {
System.out.println("Record is not deleted");
}
}
else {
errors.add("SQL", new ActionMessage("error.SQLConnectivity"));
}
} catch (Exception ex) {
errors.add("SQLException", new ActionMessage("error.SQLException"));
} finally {
try {
if (con != null) {
con.close();
}
} catch (SQLException e) {
}
}
return errors;
}
}
DeleteDataAction.java
package com.myapp.struts;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
/**
* @author pradeep.kundu
*/
public class DeleteDataAction extends org.apache.struts.action.Action {
private static final String SUCCESS = "success";
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
return null;
}
}
SearchDataForm.java
package com.myapp.struts;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
public class SearchDataForm extends org.apache.struts.action.ActionForm {
Connection con = null;
ResultSet rs;
int userId;
public int getuserId() {
return userId;
}
public void setuserId(int userId) {
this.userId = userId;
}
public SearchDataForm() {
super();
}
@Override
public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
ActionErrors errors = new ActionErrors();
if (getuserId()==0 || getuserId() < 1) {
errors.add("userId", new ActionMessage("error.userId.required"));
}
try {
String str = "SELECT * from emp where userId = ? " ;
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql:///employee", "root", "1234");
PreparedStatement ps = con.prepareStatement(str);
ps.setInt(1, userId);
rs = ps.executeQuery(str);
System.out.println("<html><head><title>search</title></head><body>");
System.out.println("<table><tr>");
System.out.println("<td><b>User Id</b></td>");
System.out.println("<td><b>First Name</b></td>");
System.out.println("<td><b>Last Name</b></td>");
System.out.println("<td><b>Age</b></td>");
System.out.println("<td><b>Number</b></td>");
System.out.println("</tr>");
while(rs.next())
{
Integer Id = rs.getInt("userId");
String firstname = rs.getString("firstName");
String lastname = rs.getString("lastName");
Integer age = rs.getInt("age");
Integer number = rs.getInt("number");
System.out.println("<tr>");
System.out.println("<td>"+Id+"</td>");
System.out.println("<td>"+firstname+"</td>");
System.out.println("<td>"+lastname+"</td>");
System.out.println("<td>"+age+"</td>");
System.out.println("<td>"+number+"</td>");
System.out.println("</tr>");
}
System.out.println("</table>");
System.out.println("</body></html>");
con.close();
ps.close();
}
catch(SQLException sx)
{
System.out.println(sx);
}
catch(ClassNotFoundException cx)
{
System.out.println(cx);
}
return errors;
}
}
SearchDataAction.java
package com.myapp.struts;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
/**
* @author pradeep.kundu
*/
public class SearchDataAction extends org.apache.struts.action.Action {
private static final String SUCCESS = "success";
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
return null ;
}
}
if you know about these problem , please give me suggesstion
thanks.
Ads