【发布时间】：2015-04-07 12:42:32
【问题描述】：
我已经设置了 3 个框架，Frame1-->我有 2 个选项从 TextField1 和 TextField2 [即（姓名，姓氏）] 查询所有或查询提供的变量，并根据 textFields 显示数据。
我尝试使用静态文本字段，但我只能查询一次，因为文本字段在输入时初始化文本，我尝试将变量传递给查询类中的构造函数，但仍然没有运气。
也许有一种方法，一旦将文本输入到静态文本字段中，文本字段就可以刷新？
请帮忙！
这就是我想要达到的目标。
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.ResultSet;
import javax.security.auth.Refreshable;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.Border;
import com.mysql.jdbc.Statement;
@SuppressWarnings("serial")
public class HistoryOptions extends JFrame implements ActionListener/
{
private Statement stmt = null;
private Container content;
private JPanel optionPanel;
private Border lineBorder;
private JLabel singleLabel = new JLabel("View Single Patient");
private JLabel orLabel = new JLabel("OR");
private JLabel FirstNLabel=new JLabel("Name: ");
private JLabel LastNLabel=new JLabel("Surname: ");
public static JTextField FirstNTF = new JTextField();
public static JTextField LastNTF=new JTextField();
private QueryTableModel TableModel= new QueryTableModel();
private JButton viewAllBT = new JButton("View All Patients");
private JButton viewSingleBT = new JButton("View ");
private JButton clearButton = new JButton("Clear ");
//private String Fname;
//private String Lname;
public HistoryOptions( String aTitle)
{
super(aTitle);
setEnabled(true);
content=getContentPane();
content.setLayout(null);
content.setBackground(Color.lightGray);
JPanel backgroundPanel = new JPanel();
ImageIcon background = new ImageIcon("img/clouds.jpg");
JLabel backgroundLabel = new JLabel();
backgroundLabel.setIcon(background);
backgroundPanel.add(backgroundLabel);
optionPanel = new JPanel();
optionPanel.setLayout(null);
Font myFont = new Font("Arial", Font.BOLD, 20);
Font myFont2 = new Font("Arial", Font.ITALIC, 15);
lineBorder = BorderFactory.createEtchedBorder(15, Color.blue, Color.blue);
optionPanel.add(FirstNLabel);
FirstNLabel.setFont(myFont2);
optionPanel.add(FirstNTF);
optionPanel.add(LastNLabel);
LastNLabel.setFont(myFont2);
optionPanel.add(LastNTF);
optionPanel.add(singleLabel);
optionPanel.add(orLabel);
optionPanel.add(viewAllBT);
optionPanel.add(viewSingleBT);
optionPanel.add(clearButton);
optionPanel.setBounds(300,155,340,225);
singleLabel.setBounds(70,5,180,30);//370,120
singleLabel.setFont(myFont);
FirstNLabel.setBounds(15,40,100,30);//300,170
FirstNTF.setBounds(120,40,200,30);//400,170
LastNLabel.setBounds(15,75,100,30);//300,205
LastNTF.setBounds(120,72,200,30);//400,205
viewSingleBT.setBounds(120,107,98,30);//400,240
clearButton.setBounds(220,107,98,30);//502,240
orLabel.setBounds(155,145,50,30);//430,290
orLabel.setFont(myFont);
viewAllBT.setBounds(15,180,305, 30);//300,330
backgroundPanel.setBounds(0,-10,940,640);
viewAllBT.addActionListener(this);
viewSingleBT.addActionListener(this);
clearButton.addActionListener(this);
content.add(optionPanel);
content.add(backgroundPanel);
optionPanel.setBorder(BorderFactory.createTitledBorder(lineBorder,"Options"));
setSize(938,630);//770,600
setVisible(true);
//TableModel.refreshFromDB5(stmt);
}
public void actionPerformed(ActionEvent e)
{
Object target=e.getSource();
ResultSet rs=null;
String cmd = null;
if (target == clearButton)
{
FirstNTF.setText("");
LastNTF.setText("");
}
if(target == viewAllBT){
AllPatientHistoryDB ph = new AllPatientHistoryDB("All Patients History Database");
ph.setVisible(true);
}
if(target == viewSingleBT){
String Fname=FirstNTF.getText();
String Lname=LastNTF.getText();
SinglePatientHistoryDB sph = new SinglePatientHistoryDB("Single Patient History Database");
sph.setVisible(true);
//QueryTableModel qtmf = new QueryTableModel(Fname,Lname);
//qtm.setName(Fname);
//qtm.setSurname(Lname);
}
}
}
SinglePatient 类
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.Border;
@SuppressWarnings("serial")
public class SinglePatientHistoryDB extends JFrame implements ActionListener
{
String cmd = null;
private Connection con = null;
private Statement stmt = null;
private ResultSet rs = null;
private Container content;
private JPanel detailsPanel;
private JPanel backgroundP;
private JScrollPane dbContentsPanel;
private Border lineBorder;
private JLabel IDLabel=new JLabel("Select ID to UPDATE: ");
private JLabel HDateLabel=new JLabel("DATE: ");
private JLabel FirstNameLabel=new JLabel("NAME: ");
private JLabel LastNameLabel=new JLabel("SURNAME: ");
private JLabel HistoryLabel=new JLabel("HISTORY INFO: ");
private JTextField IDTF = new JTextField();
private JTextField HDateTF=new JTextField();
private JTextField FirstNameTF= new JTextField();
private JTextField LastNameTF=new JTextField();
private JTextArea HistoryTF=new JTextArea();
private static QueryTableModel TableModel = new QueryTableModel();
private JTable TableofDBContents=new JTable(TableModel);
private JButton updateButton = new JButton("Update");
private JButton insertButton = new JButton("Insert");
private JButton clearButton = new JButton("Clear All");
private JTextField FirstNTF =new JTextField();
private JTextField LastNTF= new JTextField();
//private String Fname;
//private String Lname;
public SinglePatientHistoryDB( String aTitle)
{
//setting up the GUI
super(aTitle);
//Fname=FirstNTF.getText(FirstNTF);
//Lname=LastNTF.getText();
setEnabled(true);
initiate_db_conn();
//add the 'main' panel to the Internal Frame
content=getContentPane();
content.setLayout(null);
content.setBackground(Color.lightGray);
lineBorder = BorderFactory.createEtchedBorder(15, Color.blue, Color.blue);
JPanel backgroundP = new JPanel();
ImageIcon backg = new ImageIcon("img/historyBACK.jpg");
JLabel backgroundL = new JLabel();
backgroundL.setIcon(backg);
backgroundP.add(backgroundL);
content.add(IDLabel);
content.add(IDTF);
content.add(HDateLabel);
content.add(HDateTF);
content.add(FirstNameLabel);
content.add(FirstNameTF);
content.add(LastNameLabel);
content.add(LastNameTF);
content.add(HistoryLabel);
content.add(HistoryTF);
content.add(insertButton);
content.add(updateButton);
content.add(clearButton);
IDLabel.setBounds(540,370,120,25);
IDTF.setBounds(675,370,100,25);
HDateLabel.setBounds(35,370,100,25);
HDateTF.setBounds(135,370,160,25);
FirstNameLabel.setBounds(35,400,100,25);
FirstNameTF.setBounds(135,400,160,25);
LastNameLabel.setBounds(35,430,100,25);
LastNameTF.setBounds(135,430,160,25);
HistoryLabel.setBounds(35,475,100,25);
HistoryTF.setBounds(135,475,640,75);
updateButton.setBounds(780,370,100, 25);
insertButton.setBounds(780,475,100,25);
clearButton.setBounds(780,505,100,25);
insertButton.addActionListener(this);
updateButton.addActionListener(this);
clearButton.addActionListener(this);
TableofDBContents.setPreferredScrollableViewportSize(new Dimension(900, 300));
dbContentsPanel=new JScrollPane(TableofDBContents,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
dbContentsPanel.setBackground(Color.lightGray);
dbContentsPanel.setBorder(BorderFactory.createTitledBorder(lineBorder,"Patient History"));
backgroundP.setBounds(0,-10,940,640);
dbContentsPanel.setSize(850, 300);
dbContentsPanel.setLocation(35, 40);
//content.add(detailsPanel);
content.add(dbContentsPanel);
content.add(backgroundP);
setSize(938,630);//770,600
setVisible(true);
TableModel.refreshFromDB5(stmt);
}
public void initiate_db_conn()
{
try
{
// Load the JConnector Driver
Class.forName("com.mysql.jdbc.Driver");
// Specify the DB Name
String url="jdbc:mysql://localhost:3306/PatientHistoryDB";
// Connect to DB using DB URL, Username and password
con = DriverManager.getConnection(url, "root", "Pass");
//Create a generic statement which is passed to the TestInternalFrame1
stmt = con.createStatement();
}
catch(Exception e)
{
System.out.println("Error: Failed to connect to database\n"+e.getMessage());
}
}
public void actionPerformed(ActionEvent e)
{
Object target=e.getSource();
ResultSet rs=null;
String cmd = null;
if (target == clearButton)
{
IDTF.setText("");
HDateTF.setText("");
FirstNameTF.setText("");
LastNameTF.setText("");
HistoryTF.setText("");
}
if (target == insertButton)
{
try
{
String updateTemp ="INSERT INTO hdetails VALUES("+null+",'"+HDateTF.getText()+"','"+FirstNameTF.getText()+"','"+LastNameTF.getText()+"','"+HistoryTF.getText()+"');";
stmt.executeUpdate(updateTemp);
}
catch (SQLException sqle)
{
System.err.println("Error with insert:\n"+sqle.toString());
}
finally
{
TableModel.refreshFromDB5(stmt);
}
}
if (target == updateButton)
{
try
{
String updateTemp ="UPDATE hdetails SET " +
"FirstName = '"+FirstNameTF.getText()+
"', LastName = '"+LastNameTF.getText()+
"', History = '"+HistoryTF.getText()+
"', HDate ='"+HDateTF.getText()+
"' where id = "+IDTF.getText();
stmt.executeUpdate(updateTemp);
//these lines do nothing but the table updates when we access the db.
rs = stmt.executeQuery("SELECT * from hdetails ");
rs.next();
rs.close();
}
catch (SQLException sqle){
System.err.println("Error with update:\n"+sqle.toString());
}
finally{
TableModel.refreshFromDB5(stmt);
}
}}
}
还有 ViewAllHistory 类，但它工作正常，所以不需要放在这里。
这就是查询类
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.util.Vector;
import javax.swing.JTextField;
import javax.swing.table.AbstractTableModel;
@SuppressWarnings("serial")
class QueryTableModel extends AbstractTableModel
{
Vector modelData; //will hold String[] objects
int colCount;
String[] headers=new String[0] ;
Connection con;
Statement stmt = null;
String[] record;
ResultSet rs = null;
//private JTextField fnameTF = new JTextField(HistoryOptions.FirstNTF.getText());
//private JTextField lnameTF = new JTextField(HistoryOptions.LastNTF.getText());
public QueryTableModel(){//(String Fname,String Lname){
modelData = new Vector();
}//end constructor QueryTableModel
public String getColumnName(int i){
return headers[i];
}
public int getColumnCount(){
return colCount;
}
public int getRowCount(){
return modelData.size();
}
public Object getValueAt(int row, int col){
return ((String[])modelData.elementAt(row))[col];
}
// public void setName(String Fname) {
// this.fnameTF.setText(Fname);
// }
//
// public void setSurname(String Lname) {
// this.lnameTF.setText(Lname);}
public void refreshFromDB( Statement stmt1)
{
//modelData is the data stored by the table
//when set query is called the data from the
//DB is queried using “SELECT * FROM myInfo”
//and the data from the result set is copied
//into the modelData. Every time refreshFromDB is
//called the DB is queried and a new
//modelData is created
modelData = new Vector();
stmt = stmt1;
try{
//Execute the query and store the result set and its metadata
rs = stmt.executeQuery("SELECT * FROM Details");
ResultSetMetaData meta = rs.getMetaData();
//to get the number of columns
colCount = meta.getColumnCount();
// Now must rebuild the headers array with the new column names
headers = new String[colCount];
for(int h = 0; h<colCount; h++)
{
headers[h] = meta.getColumnName(h+1);
}//end for loop
// fill the cache with the records from the query, ie get all the rows
while(rs.next())
{
record = new String[colCount];
for(int i = 0; i < colCount; i++)
{
record[i] = rs.getString(i+1);
}//end for loop
modelData.addElement(record);
}// end while loop
fireTableChanged(null); //Tell the listeners a new table has arrived.
}//end try clause
catch(Exception e) {
System.out.println("Error with refreshFromDB Method\n"+e.toString());
} // end catch clause to query table
}//end refreshFromDB method
public void refreshFromDB2( Statement stmt2)
{
//modelData is the data stored by the table
//when set query is called the data from the
//DB is queried using “SELECT * FROM myInfo”
//and the data from the result set is copied
//into the modelData. Every time refreshFromDB is
//called the DB is queried and a new
//modelData is created
modelData = new Vector();
stmt = stmt2;
try{
//Execute the query and store the result set and its metadata
rs = stmt.executeQuery("SELECT * FROM feeds");
ResultSetMetaData meta = rs.getMetaData();
//to get the number of columns
colCount = meta.getColumnCount();
// Now must rebuild the headers array with the new column names
headers = new String[colCount];
for(int h = 0; h<colCount; h++)
{
headers[h] = meta.getColumnName(h+1);
}//end for loop
// fill the cache with the records from the query, ie get all the rows
while(rs.next())
{
record = new String[colCount];
for(int i = 0; i < colCount; i++)
{
record[i] = rs.getString(i+1);
}//end for loop
modelData.addElement(record);
}// end while loop
fireTableChanged(null); //Tell the listeners a new table has arrived.
}//end try clause
catch(Exception e) {
System.out.println("Error with refreshFromDB2 Method\n"+e.toString());
} // end catch clause to query table
}//end refreshFromDB method
public void refreshFromDB3( Statement stmt3)
{
//modelData is the data stored by the table
//when set query is called the data from the
//DB is queried using “SELECT * FROM myInfo”
//and the data from the result set is copied
//into the modelData. Every time refreshFromDB is
//called the DB is queried and a new
//modelData is created
modelData = new Vector();
stmt = stmt3;
try{
//Execute the query and store the result set and its metadata
rs = stmt.executeQuery("SELECT * FROM bdetails");
ResultSetMetaData meta = rs.getMetaData();
//to get the number of columns
colCount = meta.getColumnCount();
// Now must rebuild the headers array with the new column names
headers = new String[colCount];
for(int h = 0; h<colCount; h++)
{
headers[h] = meta.getColumnName(h+1);
}//end for loop
// fill the cache with the records from the query, ie get all the rows
while(rs.next())
{
record = new String[colCount];
for(int i = 0; i < colCount; i++)
{
record[i] = rs.getString(i+1);
}//end for loop
modelData.addElement(record);
}// end while loop
fireTableChanged(null); //Tell the listeners a new table has arrived.
}//end try clause
catch(Exception e) {
System.out.println("Error with refreshFromDB3 Method\n"+e.toString());
} // end catch clause to query table
}//end refreshFromDB method
public void refreshFromDB4( Statement stmt4)
{
//modelData is the data stored by the table
//when set query is called the data from the
//DB is queried using “SELECT * FROM myInfo”
//and the data from the result set is copied
//into the modelData. Every time refreshFromDB is
//called the DB is queried and a new
//modelData is created
modelData = new Vector();
stmt = stmt4;
try{
//Execute the query and store the result set and its metadata
rs = stmt.executeQuery("SELECT * FROM hdetails");
ResultSetMetaData meta = rs.getMetaData();
//to get the number of columns
colCount = meta.getColumnCount();
// Now must rebuild the headers array with the new column names
headers = new String[colCount];
for(int h = 0; h<colCount; h++)
{
headers[h] = meta.getColumnName(h+1);
}//end for loop
// fill the cache with the records from the query, ie get all the rows
while(rs.next())
{
record = new String[colCount];
for(int i = 0; i < colCount; i++)
{
record[i] = rs.getString(i+1);
}//end for loop
modelData.addElement(record);
}// end while loop
fireTableChanged(null); //Tell the listeners a new table has arrived.
}//end try clause
catch(Exception e) {
System.out.println("Error with refreshFromDB4 Method\n"+e.toString());
} // end catch clause to query table
}//end refreshFromDB method
public void refreshFromDB5( Statement stmt5)//,String Fname,String Lname)
{
modelData = new Vector();
stmt = stmt5;
//fname.setText(Fname);
//lname.setText(Lname);
//String first=fnameTF.getText();
//String last=lnameTF.getText();
try{
//Execute the query and store the result set and its metadata
//rs = stmt.executeQuery("SELECT * FROM hdetails where FirstName='"+first+"' and LastName='"+last+"'"); // pasing all variables for single user
rs = stmt.executeQuery("SELECT * FROM hdetails where FirstName='Stacy' and LastName='McDonald'");
ResultSetMetaData meta = rs.getMetaData();
//to get the number of columns
colCount = meta.getColumnCount();
// Now must rebuild the headers array with the new column names
headers = new String[colCount];
for(int h = 0; h<colCount; h++)
{
headers[h] = meta.getColumnName(h+1);
}//end for loop
// fill the cache with the records from the query, ie get all the rows
while(rs.next())
{
record = new String[colCount];
for(int i = 0; i < colCount; i++)
{
record[i] = rs.getString(i+1);
}//end for loop
modelData.addElement(record);
}// end while loop
fireTableChanged(null); //Tell the listeners a new table has arrived.
}//end try clause
catch(Exception e) {
System.out.println("Error with refreshFromDB5 Method\n"+e.toString());
} // end catch clause to query table
}//end refreshFromDB method
}// end class QueryTableModel
【问题讨论】：