您好。我重新地幫你寫了代碼，完全地符合了你的圖片中的界面要求、功能要求。代碼如下：（解決了問題，記得給我分哦~^_^呵呵……）
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import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import java.awt.Rectangle;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import java.awt.Font;
import javax.swing.JTextArea;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JComboBox;
import javax.swing.JTextField;
import javax.swing.JButton;
public class Liuyb extends JFrame {
private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JLabel jLabel = null;
private JTextArea jTextArea = null;
private JScrollPane jScrollPane = null;
private JLabel jLabel1 = null;
private JComboBox jComboBox = null;
private JLabel jLabel2 = null;
private JTextField jTextField = null;
private JButton jButton = null;
private JButton jButton1 = null;
private JButton jButton2 = null;
private JButton jButton3 = null;
/**
* This is the default constructor
*/
public Liuyb() {
super();
initialize();
}
/**
* This method initializes this
*
* @return void
*/
private void initialize() {
this.setContentPane(getJContentPane());
this.setTitle("留言板程序");
this.setBounds(new Rectangle(0, 0, 640, 480));
this.setVisible(true);
}
/**
* This method initializes jContentPane
*
* @return javax.swing.JPanel
*/
private JPanel getJContentPane() {
if (jContentPane == null) {
jLabel2 = new JLabel();
jLabel2.setBounds(new Rectangle(214, 407, 45, 24));
jLabel2.setFont(new Font("Dialog", Font.BOLD, 14));
jLabel2.setText("地說：");
jLabel1 = new JLabel();
jLabel1.setBounds(new Rectangle(32, 407, 15, 24));
jLabel1.setFont(new Font("Dialog", Font.BOLD, 14));
jLabel1.setText("你");
jLabel = new JLabel();
jLabel.setBounds(new Rectangle(283, 15, 45, 20));
jLabel.setHorizontalAlignment(SwingConstants.CENTER);
jLabel.setFont(new Font("Dialog", Font.BOLD, 14));
jLabel.setText("留言板");
jContentPane = new JPanel();
jContentPane.setLayout(null);
jContentPane.add(jLabel, null);
jContentPane.add(getJScrollPane(), null);
jContentPane.add(jLabel1, null);
jContentPane.add(getJComboBox(), null);
jContentPane.add(jLabel2, null);
jContentPane.add(getJTextField(), null);
jContentPane.add(getJButton(), null);
jContentPane.add(getJButton1(), null);
jContentPane.add(getJButton2(), null);
jContentPane.add(getJButton3(), null);
}
return jContentPane;
}
/**
* This method initializes jTextArea
*
* @return javax.swing.JTextArea
*/
private JTextArea getJTextArea() {
if (jTextArea == null) {
jTextArea = new JTextArea();
jTextArea.setText("留言內(nèi)容：");
jTextArea.setEditable(false);
}
return jTextArea;
}
/**
* This method initializes jScrollPane
*
* @return javax.swing.JScrollPane
*/
private JScrollPane getJScrollPane() {
if (jScrollPane == null) {
jScrollPane = new JScrollPane();
jScrollPane.setBounds(new Rectangle(22, 49, 534, 347));
jScrollPane.setViewportView(getJTextArea());
}
return jScrollPane;
}
/**
* This method initializes jComboBox
*
* @return javax.swing.JComboBox
*/
private JComboBox getJComboBox() {
if (jComboBox == null) {
jComboBox = new JComboBox();
jComboBox.setBounds(new Rectangle(54, 407, 149, 24));
String[] mycbox={"微笑","大笑","痛苦"};
jComboBox.addItem(mycbox[0]);
jComboBox.addItem(mycbox[1]);
jComboBox.addItem(mycbox[2]);
}
return jComboBox;
}
/**
* This method initializes jTextField
*
* @return javax.swing.JTextField
*/
private JTextField getJTextField() {
if (jTextField == null) {
jTextField = new JTextField();
jTextField.setBounds(new Rectangle(265, 407, 231, 24));
}
return jTextField;
}
/**
* This method initializes jButton
*
* @return javax.swing.JButton
*/
private JButton getJButton() {
if (jButton == null) {
jButton = new JButton();
jButton.setBounds(new Rectangle(505, 407, 70, 24));
jButton.setText("提交");
jButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
jTextArea.setText(jTextArea.getText()+"\r\n"+"你"+jComboBox.getSelectedItem().toString()+"地說："+jTextField.getText());
}
});
}
return jButton;
}
/**
* This method initializes jButton1
*
* @return javax.swing.JButton
*/
private JButton getJButton1() {
if (jButton1 == null) {
jButton1 = new JButton();
jButton1.setBounds(new Rectangle(565, 51, 60, 32));
jButton1.setText("清屏");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
jTextArea.setText("留言內(nèi)容：");
}
});
}
return jButton1;
}
/**
* This method initializes jButton2
*
* @return javax.swing.JButton
*/
private JButton getJButton2() {
if (jButton2 == null) {
jButton2 = new JButton();
jButton2.setBounds(new Rectangle(565, 112, 60, 32));
jButton2.setText("置頂");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
jTextArea.setCaretPosition(0);
}
});
}
return jButton2;
}
/**
* This method initializes jButton3
*
* @return javax.swing.JButton
*/
private JButton getJButton3() {
if (jButton3 == null) {
jButton3 = new JButton();
jButton3.setBounds(new Rectangle(565, 173, 60, 32));
jButton3.setText("至尾");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
jTextArea.setCaretPosition((int)jTextArea.getText().length());
}
});
}
return jButton3;
}
public static void main(String args[]){
new Liuyb();
}
}
先說說回復(fù)吧：
假如:
留言表（id , text ）兩個字段
回復(fù)表（ id , text parentId ）用來存放留言表id 三個字段
目前有一條留言
1001,'這是一條留言';
那么給這條留言的回復(fù)就是
1003 , '這是一條回復(fù)', 1001(這就是該留言的ID) 這樣就把留言和回復(fù)關(guān)聯(lián)上了
回復(fù)后點保存時，將數(shù)據(jù)傳入后臺，數(shù)據(jù)庫做insert操作就行了
刪除一樣的
如果刪除回復(fù)，直接傳入回復(fù)的ID 即可
如果刪除留言，得先判斷該留言有沒有回復(fù)，如果有回復(fù)，則先刪除回復(fù)，在刪除留言（外鍵約束）
首先要會數(shù)據(jù)庫，做一張留言表，一張回復(fù)表，留言表和回復(fù)表呈現(xiàn)一對多關(guān)系，就是說在回復(fù)表里面加一列叫做‘留言編號’，每次添加回復(fù)數(shù)據(jù)的時候，把對應(yīng)的的留言id寫進表里，insert into
回復(fù)表 values（回復(fù)id，留言id，回復(fù)內(nèi)容、、、）查的時候 select * from 回復(fù)表 where 留言id=想查回復(fù)的留言的id，希望理解我說的
重慶分公司
重慶分公司
