public void actionPerformed(ActionEvent evt) {
// 删除原来的JTable(JTable使用scrollPane来包装)
if (scrollPane != null) {
jf.remove(scrollPane);
}
try (
// 根据用户输入的SQL执行查询
ResultSet rs = stmt.executeQuery(sqlField.getText())) {
// 取出ResultSet的MetaData
ResultSetMetaData rsmd = rs.getMetaData();
Vector<String> columnNames = new Vector<>();
Vector<Vector<String>> data = new Vector<>();
// 把ResultSet的所有列名添加到Vector里
for (int i = 0; i < rsmd.getColumnCount(); i++) {
columnNames.add(rsmd.getColumnName(i + 1));
}
// 把ResultSet的所有记录添加到Vector里
while (rs.next()) {
Vector<String> v = new Vector<>();
for (int i = 0; i < rsmd.getColumnCount(); i++) {
v.add(rs.getString(i + 1));
}
data.add(v);
}
// 创建新的JTable
JTable table = new JTable(data, columnNames);
scrollPane = new JScrollPane(table);
// 添加新的Table
jf.add(scrollPane);
// 更新主窗口
jf.validate();
} catch (Exception e) {
e.printStackTrace();
}
}
public boolean dbOpenList(Connection connection, String sql) {
dbClearList();
this.oldSql = sql;
this.oldConnection = connection;
// apre il resultset da abbinare
ResultSet resu = null;
ResultSetMetaData meta;
try {
stat = connection.createStatement();
resu = stat.executeQuery(sql);
meta = resu.getMetaData();
if (meta.getColumnCount() > 1) {
this.contieneChiavi = true;
}
// righe
while (resu.next()) {
for (int i = 1; i <= meta.getColumnCount(); ++i) {
if (i == 1) {
dbItems.add((Object) resu.getString(i));
lm.addElement((Object) resu.getString(i));
} else if (i == 2) {
dbItemsK.add((Object) resu.getString(i));
// debug
// System.out.println("list:" + String.valueOf(i) + ":" + resu.getString(i));
} else if (i == 3) {
dbItemsK2.add((Object) resu.getString(i));
}
}
}
this.setModel(lm);
// vado al primo
if (dbTextAbbinato != null) {
// debug
// javax.swing.JOptionPane.showMessageDialog(null,this.getKey(0).toString());
dbTextAbbinato.setText(this.getKey(0).toString());
}
return (true);
} catch (Exception e) {
javax.swing.JOptionPane.showMessageDialog(null, e.toString());
e.printStackTrace();
return (false);
} finally {
try {
stat.close();
} catch (Exception e) {
}
try {
resu.close();
} catch (Exception e) {
}
meta = null;
}
}
public void setQuery(String q) {
cache = new Vector();
try {
ResultSet rs = statement.executeQuery(q);
ResultSetMetaData meta = rs.getMetaData();
colCount = meta.getColumnCount();
headers = new String[colCount];
for (int h = 1; h <= colCount; h++) {
headers[h - 1] = meta.getColumnName(h);
}
while (rs.next()) {
String[] record = new String[colCount];
for (int i = 0; i < colCount; i++) {
record[i] = rs.getString(i + 1);
}
cache.addElement(record);
} // while sonu
fireTableChanged(null);
} // try sonu
catch (Exception e) {
cache = new Vector();
e.printStackTrace();
}
} // setQuery sonu
/**
* Method declaration
*
* @param r
*/
void formatResultSet(ResultSet r) {
if (r == null) {
String g[] = new String[1];
g[0] = "Result";
gResult.setHead(g);
g[0] = "(empty)";
gResult.addRow(g);
return;
}
try {
ResultSetMetaData m = r.getMetaData();
int col = m.getColumnCount();
String h[] = new String[col];
for (int i = 1; i <= col; i++) {
h[i - 1] = m.getColumnLabel(i);
}
gResult.setHead(h);
while (r.next()) {
for (int i = 1; i <= col; i++) {
h[i - 1] = r.getString(i);
if (r.wasNull()) {
h[i - 1] = "(null)";
}
}
gResult.addRow(h);
}
r.close();
} catch (SQLException e) {
}
}
public void actionPerformed(ActionEvent e) {
String a, b, c, f, g, h, j, k, l, m, n, o, p, tol = "";
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:db2");
stm = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
} catch (Exception error) {
System.out.println(error);
}
if (e.getSource() == student) {
name = "Student";
cl.show(pnc, "cstu");
try {
rs = stm.executeQuery("Select * from Student");
rs.next();
t1.setText(rs.getString(1));
t2.setText(rs.getString(2));
t3.setText(rs.getString(3));
t4.setText(rs.getString(4));
t5.setText(rs.getString(5));
t6.setText(rs.getString(6));
} catch (Exception error) {
System.out.println(error);
}
}
if (e.getSource() == teacher) {
name = "Teacher";
cl.show(pnc, "ctea");
try {
rs = stm.executeQuery("Select * from Teacher");
rs.next();
t11.setText(rs.getString(1));
t12.setText(rs.getString(2));
t13.setText(rs.getString(3));
t14.setText(rs.getString(4));
} catch (Exception error) {
System.out.println(error);
}
}
if (e.getSource() == course) {
name = "Course";
cl.show(pnc, "ccou");
try {
rs = stm.executeQuery("Select * from Course");
rs.next();
t7.setText(rs.getString(1));
t8.setText(rs.getString(2));
t9.setText(rs.getString(3));
t0.setText(rs.getString(4));
} catch (Exception error) {
System.out.println(error);
}
}
if (e.getSource() == result) {
name = "Result";
cl.show(pnc, "cres");
try {
rs = stm.executeQuery("Select * from Result");
rs.next();
t15.setText(rs.getString(1));
t16.setText(rs.getString(2));
t17.setText(rs.getString(3));
t18.setText(rs.getString(4));
t19.setText(rs.getString(5));
t20.setText(rs.getString(6));
t21.setText(rs.getString(7));
t22.setText(rs.getString(8));
t23.setText(rs.getString(9));
t24.setText(rs.getString(10));
t25.setText(rs.getString(11));
t26.setText(rs.getString(12));
t27.setText(rs.getString(13));
} catch (Exception error) {
System.out.println(error);
}
}
if (e.getSource() == b6) {
Vector cols = new Vector();
Vector rows = new Vector();
if (z == 1) {
String sql = "Select * from " + co;
try {
rs = stm.executeQuery(sql);
meta = rs.getMetaData();
for (int i = 1; i <= meta.getColumnCount(); i++) cols.addElement(meta.getColumnName(i));
while (rs.next()) {
Vector currow = new Vector();
for (int i = 1; i <= meta.getColumnCount(); i++) currow.addElement(rs.getString(i));
rows.addElement(currow);
}
} catch (Exception ex) {
System.out.print(ex);
}
tb = new JTable(rows, cols);
js = new JScrollPane(tb);
pne2.remove(js);
pne2.add(blk, "bb");
cl2.show(pne2, "bb");
pne2.add(js, "jjs");
cl2.show(pne2, "jjs");
pne2.remove(blk);
z = 0;
}
}
if (e.getSource() == b1) // **** ADD BUTTON ****//
{
if (name == "Student") {
a = t1.getText();
b = t2.getText();
c = t3.getText();
f = t4.getText();
g = t5.getText();
h = t6.getText();
tol =
"Insert into Student values ('"
+ a
+ "','"
+ b
+ "','"
+ c
+ "','"
+ f
+ "','"
+ g
+ "','"
+ h
+ "')";
}
if (name == "Teacher") {
a = t11.getText();
b = t12.getText();
c = t13.getText();
f = t14.getText();
tol = "Insert into Teacher values ('" + a + "','" + b + "','" + c + "','" + f + "')";
}
if (name == "Course") {
a = t7.getText();
b = t8.getText();
c = t9.getText();
f = t0.getText();
tol = "Insert into Course values ('" + a + "','" + b + "','" + c + "','" + f + "')";
}
if (name == "Result") {
a = t15.getText();
b = t16.getText();
c = t17.getText();
f = t18.getText();
g = t19.getText();
h = t20.getText();
j = t21.getText();
k = t22.getText();
l = t23.getText();
m = t24.getText();
n = t25.getText();
o = t26.getText();
p = t27.getText();
tol =
"Insert into Result values ('"
+ a
+ "','"
+ b
+ "','"
+ c
+ "','"
+ f
+ "','"
+ g
+ "','"
+ h
+ "','"
+ j
+ "','"
+ k
+ "','"
+ l
+ "','"
+ m
+ "','"
+ n
+ "','"
+ o
+ "','"
+ p
+ "')";
}
try {
stm.executeUpdate(tol);
} catch (Exception error) {
System.out.println(error);
}
}
if (e.getSource() == b2) // **** DELETE BUTTON ****//
{
if (name == "Student") {
b = t2.getText();
tol = "Delete from Student where Id = '" + b + "'";
}
if (name == "Teacher") {
b = t12.getText();
tol = "Delete from Teacher where Id = '" + b + "'";
}
if (name == "Course") {
b = t8.getText();
tol = "Delete from Course where Id = '" + b + "'";
}
if (name == "Result") {
b = t16.getText();
tol = "Delete from Result where Code = '" + b + "'";
}
try {
stm.executeUpdate(tol);
} catch (Exception error) {
System.out.println(error);
}
}
if (e.getSource() == b3) // **** UPDATE BUTTON ****//
{
if (name == "Student") {
a = t1.getText();
b = t2.getText();
c = t3.getText();
f = t4.getText();
g = t5.getText();
h = t6.getText();
tol =
"Update Student set Name = '"
+ a
+ "', ID = '"
+ b
+ "', Dept = '"
+ c
+ "', CGPA = '"
+ f
+ "', Address = '"
+ g
+ "', Cell = '"
+ h
+ "' where ID = '"
+ b
+ "'";
}
if (name == "Teacher") {
a = t11.getText();
b = t12.getText();
c = t13.getText();
f = t14.getText();
tol =
"Update Teacher set Name = '"
+ a
+ "', ID = '"
+ b
+ "', Dept = '"
+ c
+ "', Course = '"
+ f
+ "' where ID = '"
+ b
+ "'";
}
if (name == "Course") {
a = t7.getText();
b = t8.getText();
c = t9.getText();
f = t0.getText();
tol =
"Update Course set Name = '"
+ a
+ "', Code = '"
+ b
+ "', Credit = '"
+ c
+ "', Prerecusite = '"
+ f
+ "' where Code = '"
+ b
+ "'";
}
if (name == "Result") {
a = t15.getText();
b = t16.getText();
c = t17.getText();
f = t18.getText();
g = t19.getText();
h = t20.getText();
j = t21.getText();
k = t22.getText();
l = t23.getText();
m = t24.getText();
n = t25.getText();
o = t26.getText();
p = t27.getText();
tol =
"Update Result set Course = '"
+ a
+ "', Code = '"
+ b
+ "', Credit = '"
+ c
+ "', A = '"
+ f
+ "', B+ = '"
+ g
+ "', B = '"
+ h
+ "', C+ = '"
+ j
+ "', C = '"
+ k
+ "', D+ = '"
+ l
+ "', D = '"
+ m
+ "', F = '"
+ n
+ "', I = '"
+ o
+ "', W = '"
+ p
+ "' where Code = '"
+ b
+ "'";
// JOptionPane.showMessageDialog(null,tol,null,JOptionPane.PLAIN_MESSAGE);
// tol = "Update Result set Course = '"+a+"', Code = '"+b+"', Credit = '"+c+"' where Code =
// '"+b+"'";
}
try {
stm.executeUpdate(tol);
} catch (Exception error) {
System.out.println(error);
}
}
if (e.getSource() == b4) // **** NEXT BUTTON ****//
{
if (name == "Student") {
try {
if (rs.next()) {
t1.setText(rs.getString(1));
t2.setText(rs.getString(2));
t3.setText(rs.getString(3));
t4.setText(rs.getString(4));
t5.setText(rs.getString(5));
t6.setText(rs.getString(6));
}
} catch (Exception error) {
System.out.println(error);
}
}
if (name == "Teacher") {
try {
if (rs.next()) {
t11.setText(rs.getString(1));
t12.setText(rs.getString(2));
t13.setText(rs.getString(3));
t14.setText(rs.getString(4));
}
} catch (Exception error) {
System.out.println(error);
}
}
if (name == "Course") {
try {
if (rs.next()) {
t7.setText(rs.getString(1));
t8.setText(rs.getString(2));
t9.setText(rs.getString(3));
t0.setText(rs.getString(4));
}
} catch (Exception error) {
System.out.println(error);
}
}
if (name == "Result") {
try {
if (rs.next()) {
t15.setText(rs.getString(1));
t16.setText(rs.getString(2));
t17.setText(rs.getString(3));
t18.setText(rs.getString(4));
t19.setText(rs.getString(5));
t20.setText(rs.getString(6));
t21.setText(rs.getString(7));
t22.setText(rs.getString(8));
t23.setText(rs.getString(9));
t24.setText(rs.getString(10));
t25.setText(rs.getString(11));
t26.setText(rs.getString(12));
t27.setText(rs.getString(13));
}
} catch (Exception error) {
System.out.println(error);
}
}
}
if (e.getSource() == b5) // **** PREVIOUS BUTTON ****//
{
if (name == "Student") {
try {
if (rs.previous()) {
t1.setText(rs.getString(1));
t2.setText(rs.getString(2));
t3.setText(rs.getString(3));
t4.setText(rs.getString(4));
t5.setText(rs.getString(5));
t6.setText(rs.getString(6));
}
} catch (Exception error) {
System.out.println(error);
}
}
if (name == "Teacher") {
try {
if (rs.previous()) {
t11.setText(rs.getString(1));
t12.setText(rs.getString(2));
t13.setText(rs.getString(3));
t14.setText(rs.getString(4));
}
} catch (Exception error) {
System.out.println(error);
}
}
if (name == "Course") {
try {
if (rs.previous()) {
t7.setText(rs.getString(1));
t8.setText(rs.getString(2));
t9.setText(rs.getString(3));
t0.setText(rs.getString(4));
}
} catch (Exception error) {
System.out.println(error);
}
}
if (name == "Result") {
try {
if (rs.previous()) {
t15.setText(rs.getString(1));
t16.setText(rs.getString(2));
t17.setText(rs.getString(3));
t18.setText(rs.getString(4));
t19.setText(rs.getString(5));
t20.setText(rs.getString(6));
t21.setText(rs.getString(7));
t22.setText(rs.getString(8));
t23.setText(rs.getString(9));
t24.setText(rs.getString(10));
t25.setText(rs.getString(11));
t26.setText(rs.getString(12));
t27.setText(rs.getString(13));
}
} catch (Exception error) {
System.out.println(error);
}
}
}
}