I am using Eclipse, with MY SQL Server 5.0.
Using JFrame, I insert Tamil words into a textfield. However, the MY SQL console shows question marks instead of the Tamil words. I also see question marks in the textfield, but I am able to type there in Tamil using Alt+Shift key.
(Tamil being an indian language with special characters)
How can I properly switch to Unicode?
enter code here
try
{
try
{
Class.forName ("com.mysql.jdbc.Driver");
try
{
java.sql.Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydbase?useUnicode=true&characterEncoding=utf-8", "root", "ALPHAS");
String sql = "insert into morph values(?,?,?)";
String sql1 = "insert into word values(?)";
String sql2 = "insert into stems values(?)";
String sql3 = "insert into suffixs values(?)";
java.sql.PreparedStatement psmt = conn.prepareStatement(sql);
java.sql.PreparedStatement psmt1 = conn.prepareStatement(sql1);
java.sql.PreparedStatement psmt2 = conn.prepareStatement(sql2);
java.sql.PreparedStatement psmt3 = conn.prepareStatement(sql3);
String s= jTextField1.getText() ;
String sq = "select*from word";
String sqlA = "select Word from morph where Word ="+"'"+jTextField1.getText()+"'";
try
{
java.sql.Statement stmtB = conn.createStatement();
java.sql.ResultSet rsq = stmtB.executeQuery(sqlA);
while(rsq.next())
{
String sA = jTextField3.getText() ;
String ds = "WordExists";
if (s== sA)
{
jTextField3.setText(rsq.getString("Word"));
jTextField1.setText(rsq.getString("ds"));
}
}
}
catch (SQLException e )
{
e.printStackTrace();
}
String sA = jTextField3.getText() ;
char[] ch = s.toCharArray();
int y = s.length();
int k=1;
for (int m = y-1 ; m >=0; m--)
{
String pl1 = new String(ch,0,m);
if(pl1.length()>=2)
{
char[] dh = new char[y];
int c=y-1;
int g = y-1;
for (int j=c; j>=0; j--)
{
if(m>=2)
{
dh[g] = ch[j];
String pl = new String(ch,0,m);
String mpm = new String(dh,0,y);
--m;
// System.out.println(""+pl+"/"+mpm.trim()+"");
// System.out.println(""+pl+"/"+mpm.trim()+"");
g--;
k++;
if(k==y-1)
{
System.out.println(""+pl+"/"+mpm.trim()+"");
psmt.setString(1,s);
psmt.setString(2,pl);
psmt.setString(3,mpm.trim()+"");
psmt1.setString(1,s);
psmt2.setString(1,pl);
psmt3.setString(1,mpm.trim()+"");
psmt.executeUpdate();
psmt1.executeUpdate();
psmt2.executeUpdate();
psmt3.executeUpdate();
}
}
}
}
}
}
catch(Exception E)
{
E.printStackTrace();
}
}
catch(Exception E)
{
E.printStackTrace();
}
}
catch(Exception E)
{
E.printStackTrace();
}
See UTF-8 all the way through
Question marks come from this:
The client has a valid character (good), and
The SET NAMES agrees with the encoding that the client has (good), but
The target column's CHARACTER SET does not include the intended character (bad).
The Tamil words are lost. You will need to fix the CHARACTER SET and re-INSERT the text.
Related
I have code, where I have single quote or APOSTROPHE in my search
I have database which is having test table and in name column of value is "my'test"
When running
SELECT * from test WHERE name = 'my''test';
this works fine
If I use the same in a Java program I am not getting any error or any result
But If I give the name with only single quote then it works
SELECT * from test WHERE name = 'my'test';
Could you please help me out to understand.
Java code is
Connection con = null;
PreparedStatement prSt = null;
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
con = DriverManager.
getConnection("jdbc:oracle:thin:#localhost:1521:orcl"
,"user","pwd");
String query = "SELECT * from "
+ "WHERE name = ? ";
prSt = con.prepareStatement(query);
String value = "my'mobile";
char content[] = new char[value.length()];
value.getChars(0, value.length(), content, 0);
StringBuffer result = new StringBuffer(content.length + 50);
for (int i = 0; i < content.length; i++) {
if (content[i] == '\'')
{
result.append("\'");
result.append("\'");
}
else
{
result.append(content[i]);
}
}
prSt.setObject(1, result.toString());
int count = prSt.executeUpdate();
System.out.println("===============> "+count);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
} finally{
try{
if(prSt != null) prSt.close();
if(con != null) con.close();
} catch(Exception ex){}
}
You don't have to escape anything for the parameter of a PreparedStatement
Just use:
prSt = con.prepareStatement(query);
prSt.setString("my'mobile");
Additionally: if you are using a SELECT statement to retrieve data, you need to use executeQuery() not executeUpdate()
ResultSet rs = prst.executeQuery();
while (rs.next())
{
// process the result here
}
You might want to go through the JDBC tutorial before you continue with your project: http://docs.oracle.com/javase/tutorial/jdbc/index.html
I finished making an encryption program that encrypts text and tried to apply this program to encrypt a field in a database table. I have a problem that all the data field is encrypted by on value (last record)
public static void main(String[] args) throws IOException {
String v_url = "jdbc:oracle:thin:#192.168.2.154:1522:orcl2";
String v_username = "scott";
String v_password = "tiger";
Connection con = null;
try {
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
con = DriverManager.getConnection(v_url, v_username, v_password);
System.out
.println("Connection to Oracle database was Established");
String sql = "select JOB_NAME from job ";
Statement stmt = con.createStatement();
ResultSet srs = stmt.executeQuery(sql);
while (srs.next()) {
vname = srs.getString("job_name");
}
} catch (SQLException err) {
System.out.println(err.getMessage());
}
Scanner in = new Scanner(System.in);
System.out.println("Enter Your KeyText ");
String StrKey = in.nextLine();
// Print the Concatenated Data.
String ConcatenatedData = StrKey.concat(vname);
System.out.println("The plaintext Data is : " + ConcatenatedData);
// Convering the Concatenated data to Ascii data.
byte[] asciiText = null;
try {
// translating text String to 7 bit ASCII encoding
asciiText = ConcatenatedData.getBytes("US-ASCII");
// System.out.println(Arrays.toString(asciiText));
} catch (java.io.UnsupportedEncodingException e) {
e.printStackTrace();
}
String binary = "";
for (byte b : asciiText) {
// binary = Integer.toBinaryString(b & 255 | 256).substring(1);
binary += Integer.toBinaryString(0x100 + (int) (b & 0xFF)).substring(1);
}
// System.out.println("Requested binary :" +binary);
String ReversedBinary = binary.replace('0', '2').replace('1', '0').replace('2', '1');
// System.out.println("Reveresd binary :" + ReversedBinary);
mainencdec decimalToBinary = new mainencdec();
String binary1 = decimalToBinary.convertBinaryStringToString(ReversedBinary);
try {
String sql_statment = "UPDATE job SET job_name =?";
PreparedStatement updatequery = con.prepareStatement(sql_statment);
updatequery.setString(1, binary1);
updatequery.executeQuery();
con.commit();
System.out.println("An existing user was updated successfully!");
} catch (SQLException err) {
System.out.println(err.getMessage());
}
}
the problem is that the data in job name field is encrypted by the same value as: JOB_NAME
323130,2'2$1'2&0&2#1
323130,2'2$1'2&0&2#1
323130,2'2$1'2&0&2#1
323130,2'2$1'2&0&2#1
323130,2'2$1'2&0&2#1
I want each value in this field encrypted according to its data
I have a JFrame that has 3 JTextfields and 2 JDatechooser, what I am trying to do is if only one JTextfield has something typed in it and I press the search button, then I will be able to retrieve the data to JTable, but the problem is I have to fill out all JTextFileds and JDatechooser in order to retrieve data. My idea is to ignore null JTextfields and JTdatechooser if only one JTextfield has the keyword I want ?? Any suggestions ?? Thanks in advance,
public ArrayList<BillsRecord> getBillRecordByID(int EmpCode, String Fname, String Lname, String sDate, String eDate) throws SQLException {
String sql = "SELECT B.DATE AS DT, B.EMP_ID, E.FNAME, E.LNAME, MONEY_SENT, RENT, PHONE, GAS, ELECTRICITY, INTERNET, OTHER"
+ " FROM EMPLOYEE E INNER JOIN BILLS B ON E.EMP_ID = B.EMP_ID"
+ " WHERE B.EMP_ID = ? "
+ " OR E.FNAME = ? "
+ " OR E.LNAME = ? "
+ " OR DATE BETWEEN ? AND ? "
+ " ORDER BY B.DATE";
DBConnection con = new DBConnection();
Connection connect = con.getConnection();
PreparedStatement ps = null;
ArrayList<BillsRecord> records = new ArrayList<>();
try {
ps = connect.prepareStatement(sql);
ps.setInt(1, EmpCode);
ps.setString(2, Fname);
ps.setString(3, Lname);
ps.setString(4, sDate);
ps.setString(5, eDate);
ResultSet rs = ps.executeQuery();
if (rs.next()) {
BillsRecord billrec = new BillsRecord();
billrec.setDATE(rs.getString("DT"));
billrec.setEMP_ID(rs.getInt("EMP_ID"));
billrec.setFNAME(rs.getString("FNAME"));
billrec.setLNAME(rs.getString("LNAME"));
billrec.setMONEY_SENT(rs.getDouble("MONEY_SENT"));
billrec.setRENT(rs.getDouble("RENT"));
billrec.setPHONE(rs.getDouble("PHONE"));
billrec.setGAS(rs.getDouble("GAS"));
billrec.setELECTRICITY(rs.getDouble("ELECTRICITY"));
billrec.setINTERNET(rs.getDouble("INTERNET"));
billrec.setOTHER(rs.getDouble("OTHER"));
records.add(billrec);
return records;
}
} catch (SQLException e) {
System.out.println(e.toString());
} finally {
if (ps != null) {
ps.close();
}
if (connect != null) {
connect.close();
}
}
return null;
}
private void search() {
try {
JTextField stxt = ((JTextField) startdatetxt.getDateEditor().getUiComponent());
String sDATE = stxt.getText().trim();
JTextField etxt = ((JTextField) enddatetxt.getDateEditor().getUiComponent());
String eDATE = etxt.getText().trim();
int EMP_ID = Integer.parseInt(this.empidtxt.getText().trim());
String FNAME = this.firstnametxt.getText().trim();
String LNAME = this.lastnametxt.getText().trim();
BillRecordDao billrecdao = new BillRecordDao();
ArrayList<BillsRecord> records = billrecdao.getBillRecordByID(EMP_ID, FNAME, LNAME, sDATE, eDATE);
Object[] tableColumnName = new Object[11];
tableColumnName[0] = "Date";
tableColumnName[1] = "H.License";
tableColumnName[2] = "First Name";
tableColumnName[3] = "Last Name";
tableColumnName[4] = "MONEY SENT";
tableColumnName[5] = "RENT";
tableColumnName[6] = "PHONE";
tableColumnName[7] = "GASE";
tableColumnName[8] = "ELECTRICITY";
tableColumnName[9] = "INTERNET";
tableColumnName[10] = "OTHER";
DefaultTableModel tbd = new DefaultTableModel();
tbd.setColumnIdentifiers(tableColumnName);
this.BillsSummaryTable.setModel(tbd);
Object[] RowRec = new Object[11];
for (int i = 0; i < records.size(); i++) {
RowRec[0] = records.get(i).getDATE();
RowRec[1] = records.get(i).getEMP_ID();
RowRec[2] = records.get(i).getFNAME().toUpperCase();
RowRec[3] = records.get(i).getLNAME().toUpperCase();
RowRec[4] = records.get(i).getMONEY_SENT();
RowRec[5] = records.get(i).getRENT();
RowRec[6] = records.get(i).getPHONE();
RowRec[7] = records.get(i).getGAS();
RowRec[8] = records.get(i).getELECTRICITY();
RowRec[9] = records.get(i).getINTERNET();
RowRec[10] = records.get(i).getOTHER();
tbd.addRow(RowRec);
}
} catch (SQLException e) {
System.out.println(e.toString());
}
}
Basically, you need to create a variable/dynamic query based on the available values
Now, you can do this using something like StringBuilder or even storing each query element in a List or array, but you always end up with the "trailing OR" problem (you need to know when you've got to the last element and not append the "OR" to the String or remove the trailing "OR" from the resulting String). While not difficult, it's just a pain.
However, if you're using Java 8, you can use StringJoiner!
StringJoiner sj = new StringJoiner(" OR ");
String sql = "SELECT B.DATE AS DT, B.EMP_ID, E.FNAME, E.LNAME, MONEY_SENT, RENT, PHONE, GAS, ELECTRICITY, INTERNET, OTHER"
+ " FROM EMPLOYEE E INNER JOIN BILLS B ON E.EMP_ID = B.EMP_ID"
+ " WHERE ";
List values = new ArrayList();
// EmpCode MUST be a Integer, so it can be null
if (EmpCode != null) {
sj.add("B.EMP_ID = ?");
values.add(EmpCode);
}
if (FName != null) {
sj.add("E.FNAME = ?");
values.add(FName);
}
if (LName != null) {
sj.add("E.LNAME = ?");
values.add(LName);
}
if (sDate != null && eDate != null) {
sj.add("DATE BETWEEN ? AND ?");
values.add(sDate);
values.add(eDate);
}
sql += sj.toString();
Connection connect = null;
try (PreparedStatement ps = connect.prepareStatement(sql)) {
for (int index = 0; index < values.size(); index++) {
ps.setObject(index + 1, values.get(index));
}
try (ResultSet rs = ps.executeQuery()) {
if (rs.next()) {
//...
}
}
} catch (SQLException exp) {
exp.printStackTrace();
}
You might also like to have a look at The try-with-resources Statement and have a read through Code Conventions for the Java TM Programming Language, it will make it easier for people to read your code and for you to read others
actually I have 10-30 dummies to get the value from txtCC, but i'd only used 3 dummies for example below..
So how do I get each values and save it directly to my database without using dummy? It's a big deal coz' my code was too large to compile using those dummies..
THANKS for any help..
private void bSaveActionPerformed(java.awt.event.ActionEvent evt)
{
// Save to database
String cc = txtCC.getText();
String delimiter = ",";
String[] temp;
temp = cc.split(delimiter);
for(int i = 0; i < temp.length; i++)
if(i==0) {
txtC1.setText(temp[0]);
txtC2.setText("0");
txtC3.setText("0"); }
else if (i==1) {
txtC1.setText(temp[0]);
txtC2.setText(temp[1]);
txtC3.setText("0"); }
else if (i==2) {
txtC1.setText(temp[0]);
txtC2.setText(temp[1]);
txtC3.setText(temp[2]); }
try {
String cc1 = txtC1.getText(); int CC1 = Integer.parseInt(cc1);
String cc2 = txtC2.getText(); int CC2 = Integer.parseInt(cc2);
String cc3 = txtC3.getText(); int CC3 = Integer.parseInt(cc3);
int opt = JOptionPane.showConfirmDialog(null,"Are you sure you want to save this record? ");
if (opt == 0){
if(!txtC1.getText().equals("0")) {
stmt=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
String sql = "Select * from tbl_liqinfo";
rs = stmt.executeQuery(sql);
rs.next();
rs.moveToInsertRow();
rs.updateInt("CC", CC1);
rs.insertRow();
rs.close();
}
if(!txtC2.getText().equals("0")) {
stmt=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
String sql = "Select * from tbl_liqinfo";
rs = stmt.executeQuery(sql);
rs.next();
rs.moveToInsertRow();
rs.updateInt("CC", CC2);
rs.insertRow();
rs.close();
}
if(!txtC3.getText().equals("0")) {
stmt=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
String sql = "Select * from tbl_liqinfo";
rs = stmt.executeQuery(sql);
rs.next();
rs.moveToInsertRow();
rs.updateInt("CC", CC3);
rs.insertRow();
rs.close();
}
}
}
catch (SQLException err){
JOptionPane.showMessageDialog(FrmEmpLiquidation.this, err.getMessage());
}
}
Instead of using dummies, create simple small methods and make use of it. This will reduce you line of code. and also easy to understand.
private void bSaveActionPerformed(java.awt.event.ActionEvent evt){
// Save to database
String cc = txtCC.getText();
String delimiter = ",";
String[] temp;
temp = cc.split(delimiter);
for(int i = 0; i < temp.length; i++)
insertData(temp[i]);
}
public void insertData(final String data){
txtC1.setText(data);
try {
String cc1 = txtC1.getText(); int CC1 = Integer.parseInt(cc1);
int opt = JOptionPane.showConfirmDialog(null,"Are you sure you want to save this record? ");
if (opt == 0){
if(!txtC1.getText().equals("0")) {
stmt=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
String sql = "Select * from tbl_liqinfo";
rs = stmt.executeQuery(sql);
rs.next();
rs.moveToInsertRow();
rs.updateInt("CC", CC1);
rs.insertRow();
rs.close();
}
}
}
catch (SQLException err){
JOptionPane.showMessageDialog(FrmEmpLiquidation.this, err.getMessage());
}
}
Ok so this is my code
public static ArrayList getMaterialerFraOrdreNr(String s_date, String e_date) throws SQLException, InterruptedException {
int tal = 0;
ArrayList nameOfColumns = getNameOfColumns(); // name of columns
ArrayList orderNumber = getOrdre_Nr_FromDB(s_date, e_date); // order number
//første loop kører gennem number of columns
//anden loop kører gennem name of column
ResultSet rs = null;
Connection con = null;
try {
Class.forName(DB.driver);
con = DriverManager.getConnection(DB.URL, DB.ID, DB.PW);
for (int i = 1; i < orderNumber.size(); i++) {
for (int j = 1; j < nameOfColumns.size(); j++) {
String nameOfColum = (String) nameOfColumns.get(i);
int orderNr = (Integer) orderNumber.get(j);
System.out.println("orderNr " + orderNr);
//SELECT v1001 FROM ORDRE_spec WHERE ordre_nr = 1;
String query = "SELECT ? AS ans FROM ordre_spec WHERE ordre_nr = ?";
PreparedStatement prest = con.prepareStatement(query);
prest.setString(1, nameOfColum);
prest.setInt(2, orderNr);
System.out.println("orderNr " + orderNr);
System.out.println("nameOfColum = " + nameOfColum);
rs = prest.executeQuery();
if(rs.next()){
tal = rs.getInt("ans");
MaterialeNum.add(tal);
System.out.println("materiale num = " + MaterialeNum);
}
}
}
} catch (ClassNotFoundException | SQLException ee) {
System.out.println("fail og der er så her");
System.err.println(ee);
} finally {
con.close();
}
System.out.println(kundeNum.toString());
return kundeNum;
}
public static void main(String[] args) throws SQLException, InterruptedException {
NewClass.getMaterialerFraOrdreNr("1990-10-10", "2020-10-10");
}
And my problem is that I'm getting a java.sql.SQLException: Fail to convert to internal representation
I really cant see what the error should be.. plz help if you can see the error :)
String query = "SELECT ? AS ans FROM ordre_spec WHERE ordre_nr = ?";
You cannot parameterize column names. You can only parameterize column values.
Basically you need to do:
String query = "SELECT " + nameOfColum + " AS ans FROM ordre_spec WHERE ordre_nr = ?";
Keep in mind that this is prone to SQL injection if nameOfColum is controllable by enduser. If this is indeed the case, you may want to perform string matching on e.g. \w+ before continuing.