好的，这是独家新闻。我有一个应用程序，它使用表单和.java文件，允许用户选择目录，查找目录中的所有照片，将所有照片转换为字节数据，并将数据插入SQL数据库。我用过：
一个名为Photouploader的主文件
package photouploader;
import javax.swing.*;
import java.io.*;
/**
*
* @author 10339
*/
public class PhotoUploader{
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
JFileChooser j = new JFileChooser();
j.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
int returnVal = j.showOpenDialog(null);
if(returnVal == javax.swing.JFileChooser.APPROVE_OPTION){
File dir = j.getSelectedFile();
File[] matches = dir.listFiles(new FilenameFilter()
{
public boolean accept(File dir,String name)
{
return name.endsWith(".png")||name.endsWith(".jpg");
}
});
if(matches.length==0){
JOptionPane.showMessageDialog(null,"No picture files have been "
+ "found.");
}
else{
fileParser fp = new fileParser(); //create new fileparser
fp.setFiles(matches); //send in all found files
fp.setFilenames(); //convert files to names
NewJFrame JP = new NewJFrame(); //create new form
JP.setVisible(true);
//update lists on the form
JP.update_Upload_list(fp.getgoodFilenames());
JP.update_DNUpload_list(fp.getbadFilenames());
}
}
else{
JOptionPane.showMessageDialog(null,"you have not chosen "
+ "a valid directory");
}
}
}
我的所有表单数据都在我的类NewJFrame中：
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package photouploader;
import javax.swing.*;
import java.util.*;
/**
*
* @author 10339
*/
public class NewJFrame extends javax.swing.JFrame {
/**
* Creates new form NewJFrame
*/
public NewJFrame() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
Upload_Button = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
FilesToUpload = new javax.swing.JList();
jScrollPane2 = new javax.swing.JScrollPane();
DNUpload = new javax.swing.JList();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
Upload_Button.setText("Upload");
Upload_Button.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
Upload_ButtonActionPerformed(evt);
}
});
jScrollPane1.setViewportView(FilesToUpload);
jScrollPane2.setViewportView(DNUpload);
jLabel1.setText("Files to Upload");
jLabel2.setText("Files that will not be uploaded");
jLabel2.setToolTipText("");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(Upload_Button)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 419, Short.MAX_VALUE)
.addComponent(jScrollPane2)))
.addComponent(jLabel1)
.addComponent(jLabel2))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(5, 5, 5)
.addComponent(jLabel2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(Upload_Button)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void Upload_ButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
public void update_Upload_list(ArrayList goodfiles)
{
DefaultListModel model1 = new DefaultListModel();
for(int i=0;i<goodfiles.size();i++){
model1.addElement(goodfiles.get(i));
}
FilesToUpload.setModel(model1);
}
public void update_DNUpload_list(ArrayList badfiles)
{
DefaultListModel model1 = new DefaultListModel();
for(int i=0;i<badfiles.size();i++){
model1.addElement(badfiles.get(i));
}
DNUpload.setModel(model1);
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JList DNUpload;
private javax.swing.JList FilesToUpload;
private javax.swing.JButton Upload_Button;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
// End of variables declaration
}
FileParser类完成解析和准备将数据发送到SQL类的所有提升。 fileparser是：
package photouploader;
import java.nio.*;
import java.io.*;
import java.util.*;
/**
* Compiles July 5th 2013
* @author Shawn Corliss
* Company: City of Lethbridge Fire Department
* This is the fileParser Class
*/
public class fileParser {
/*var Decleration*/
private File dir; //Directory
private File [] allFiles; //Holds all files with D
private ArrayList goodfilenames = new ArrayList(); //Filenames
private ArrayList badfilenames = new ArrayList(); //Filenames
private ArrayList goodfiles = new ArrayList(); //Files with Dir
private ArrayList badfiles = new ArrayList(); //Files with Dir
/*Accessor Methods*/
public File getDir(){
return dir; //Reurun Direcotry
}
public void setDir(File directory){
dir=directory; //Set Directory
}
public File[] getFiles(){
return allFiles; //Return all Files in array
}
public ArrayList getgoodFilenames(){
return goodfilenames ; //Return Arrylist of files >=39
}
public ArrayList getbadFilenames(){
return badfilenames ; //Return Arrylist of files <=40
}
/* This funcition gets all the files found in the matching process
* The matches are then cloned.
* The length is checked and if +39 then files are placed in bad arraylist
* if smaller then 40 then they are placed in the good file arraylist
*/
public void setFiles(File [] matches){
allFiles=matches.clone();
for (int a=0;a<matches.length;a++){
if(matches[a].toString().substring
(matches[a].toString().lastIndexOf("\\")+1
).length()<40){
goodfiles.add(matches[a]);
}
else{
badfiles.add(matches[a]);
}
}
}
//calls setgood and setbad filename functions
public void setFilenames(){
setgoodFilenames();
setbadFilenames();
}
/*This function will convert the file path into a file name
* by parsing out the string to the right of the last found "\"
* used to push good file names to the list box and for conversion to bytes.
*/
public void setgoodFilenames(){
for(int i=0;i<goodfiles.size();i++){ //for each item in the goodfiles
goodfilenames.add(
goodfiles.get(i).toString().substring(
goodfiles.get(i).toString().lastIndexOf("\\")+1)
);
}
}
/*This function will convert the file path into a file name
* by parsing out the string to the right of the last found "\"
* used to push bad file names to the list box.
*/
public void setbadFilenames(){
for(int i=0;i<badfiles.size();i++){ //for each item in the badfiles
badfilenames.add(
badfiles.get(i).toString().substring(
badfiles.get(i).toString().lastIndexOf("\\")+1)
);
}
}
}
问题是我在NewJframe类中有一个标记为Upload的按钮。与按下按钮相关联的此按钮/事件不知道在photouploaders主函数中运行的已初始化的fileparser（fileParser fp = new fileParser();）类。我想要的功能是：
当按下上传按钮时，事件将分流回主要的fp.runSQL（）;
请注意
fileparser.runSQL未定义。
请帮忙。
我可以通过监听器将数据发送回main吗？或者我应该使用界面？还是一个班级？
谢谢，
Scorliss
答案 0 :(得分：0)
您可以尝试在main中构造文件解析器对象，然后在创建时将其作为参数传递给表单类的构造函数。这将允许main和form类访问同一个文件解析器对象。
另一种选择是将公共方法添加到执行文件解析操作的主类中。然后，您可以在main中构造一个文件解析器对象，并在需要使用文件解析器对象时将表单类调用到main的方法中。