Simple JSF

Here my snippet that working successfully...
The page is where user can view ,add,delete and edit the data in the same page.

My Managed bean

public class MyBean {

private List myDataList;
private HtmlDataTable myDataTable;//bind
private MyData myDataItem=new MyData();
private boolean editMode=false;
private String status="";
private MyDataAccess da=new MyDataAccess();
/** Creates a new instance of MyBean */

public MyBean() {
loadMyDataList();
}
public void loadMyDataList(){
//my dao thing
try {
myDataList=da.retrieveNationalityList();
} catch (Exception ex) {
System.out.println("Something error while loadMyDataList...");
ex.printStackTrace();
}

}
public List getMyDataList() {
if(FacesContext.getCurrentInstance().getRenderResponse()){
loadMyDataList();
}
return myDataList;
}

public void setMyDataList(List myDataList) {
this.myDataList = myDataList;
}

public String deleteMyData(){
//get selected MyData
setMyDataItem((MyData)getMyDataTable().getRowData());
status=da.deleteNationality( getMyDataItem().getId());
setMyDataItem(null);//clean textfield
System.out.println("Str inside delete-->"+ status);
return "delete"; //navigation case
}

public HtmlDataTable getMyDataTable() {
return myDataTable;
}

public void setMyDataTable(HtmlDataTable myDataTable) {
this.myDataTable = myDataTable;
}

//addition
public String insertData(){
try {
MyDataAccess da=new MyDataAccess();
System.out.println("Tgk jap date ko tulih camnaa? --->" + getMyDataItem().getSetupDate());
status=da.insertData(getMyDataItem());

} catch (Exception ex) {
ex.printStackTrace();
}
if(status=="success"){
System.out.println("status--->"+ status);
setMyDataItem(null);
return "success";
}
else{
return "fail";
}
}

public MyData getMyDataItem() {
return myDataItem;
}

public void setMyDataItem(MyData myDataItem) {
this.myDataItem = myDataItem;
}

public String editData(){
editMode=true;
System.out.println("editMode --> "+ editMode);
setMyDataItem((MyData)getMyDataTable().getRowData());
return "edit";
}

public String saveData(){ //in edit mode
System.out.println("editMode---> "+ editMode);
status=da.editNationality(getMyDataItem());
setMyDataItem(null);//clean textfield
System.out.println("status inside saveData-->"+ status);
return "save";
}
}

My data object
public class MyData {

private String id;
private String descr;
private String setupDate;
private String changeDate;

/** Creates a new instance of MyData */
public MyData() {
}

//setter
public void setId(String id) {
this.id = id;
}

public void setChangeDate(String changeDate) {
this.changeDate = changeDate;
}

public void setSetupDate(String setupDate) {
// setupDate.toString();
this.setupDate = setupDate;
}

public void setDescr(String descr) {
this.descr = descr;
}

//getter
public String getDescr() {
return descr;
}

public String getId() {
return id;
}
public String getSetupDate() {
return setupDate;
}

public String getChangeDate() {
return changeDate;
}

}

My data access

public class MyDataAccess {
private String str="";
Connection con = null;
PreparedStatement ps = null;
/** Creates a new instance of MyDataAccess */
public MyDataAccess() {
}

public List retrieveNationalityList() throws Exception{
ArrayList ls=new ArrayList();
ResultSet rsReturn = null;

try {
con = DBManager.getDBConnection();
String sql="select id,descr,to_char(setup_date,'MM/dd/yyyy, hh:mm:ss'),to_char(change_date,'MM/dd/yyyy, hh:mm:ss') from nationality order by id asc" ;
System.out.println("sql-->"+ sql);
ps = con.prepareStatement(sql);
System.out.println("Nilai ps---->"+ ps);
rsReturn = ps.executeQuery();
System.out.println("rsReturn-->"+rsReturn);
while(rsReturn.next()){
MyData n=new MyData();
n.setId(rsReturn.getString(1));
System.out.println("rsReturn.getString(1)"+ rsReturn.getString(1));
n.setDescr(rsReturn.getString(2));
System.out.println("rsReturn.getString(2)"+ rsReturn.getString(2));
n.setSetupDate(rsReturn.getString(3));
n.setChangeDate(rsReturn.getString(4));
System.out.println("rsReturn.getString(4)"+ rsReturn.getString(4));
ls.add(n);
}
System.out.println("list size---->"+ ls.size());
} catch(SQLException sqlex) {
System.out.println("Inside sqlexception ...");
sqlex.printStackTrace();
} finally {
con.close();
ps.close();
}

return ls;
}


public String deleteNationality(String id){
try {
try {
con = DBManager.getDBConnection();
} catch (Exception ex) {
System.out.println("Inside deleteNationality ");
ex.printStackTrace();
}
int count=0;

String sql="delete nationality where id='"+id+"'";
System.out.println("sql-->"+ sql);
ps = con.prepareStatement(sql);
System.out.println("Nilai ps---->"+ ps);
count= ps.executeUpdate();
if(count<0 data-blogger-escaped-str="success">"+str);

} catch(SQLException sqlex) {
sqlex.printStackTrace();
} finally {
try {
con.close();
ps.close();
} catch (SQLException ex) {
ex.printStackTrace();
}
}
return str;
}

//for addition
public String insertData(MyData nationality) throws Exception {
try {
con = DBManager.getDBConnection();
int count=0;

String sql="insert into nationality(id,descr,setup_date,change_date) values('"+nationality.getId()+
"','"+nationality.getDescr()+"',current_timestamp,current_timestamp)";
System.out.println("sql--&gt;"+ sql);
ps = con.prepareStatement(sql);
System.out.println("Nilai ps----&gt;"+ ps);
count= ps.executeUpdate();
if(count<0 data-blogger-escaped-str="success">"+str);

} catch(SQLException sqlex) {
System.out.println("Inside sqlexception ...");
sqlex.printStackTrace();
} finally {
con.close();
ps.close();
}
return str;
}

public String editNationality(MyData data){
try {
try {
con = DBManager.getDBConnection();
} catch (Exception ex) {
System.out.println("Inside editNationality ");
ex.printStackTrace();
}
int count=0;
String sql="UPDATE nationality SET descr='"+data.getDescr()
+"',change_date=current_timestamp WHERE id ='"+data.getId()+"'";
System.out.println("sql--&gt;"+ sql);
ps = con.prepareStatement(sql);
System.out.println("Nilai ps----&gt;"+ ps);
count= ps.executeUpdate();
if(count<0 data-blogger-escaped-str="success">"+str);

} catch(SQLException sqlex) {
sqlex.printStackTrace();
} finally {
try {
con.close();
ps.close();
} catch (SQLException ex) {
ex.printStackTrace();
}
}
return str;
}
}