此应用程序将在Person类的帮助下写入和读取csv文件。它不会使用数据填充表。我试图通过将相同的数据加载到plist = new ArrayList（）然后将此plist传递给data = FXCollections.observableList，同时将csv文件加载到list = new ArrayList（）来执行表的加载（plist中）
请说明此代码失败的位置。是否无法加载observableList 同时列表ArrayList被加载或是从列表转移到plist不工作？ 我也不确定是否调用了CellValueFactory。建议的解决方案将不胜感激。 我不想使用第三方API，也不希望使用TableView来添加/删除数据。
MainClass
package appCSVFile;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.fxml.FXMLLoader;
public class CSVMain extends Application {
@Override
public void start(Stage pStage) {
try {
AnchorPane root = (AnchorPane)FXMLLoader.load(getClass().getResource("csv.fxml"));
Scene scene = new Scene(root,1040,650);
pStage.setScene(scene);
pStage.setResizable(false);
pStage.setTitle("CSV File Demo");
pStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
}
Controller Class
package appCSVFile;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.ListIterator;
import java.util.Optional;
import java.util.ResourceBundle;
import java.util.Scanner;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Alert;
import javafx.scene.control.ButtonType;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.TableColumn.CellEditEvent;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.stage.FileChooser;
public class CSVController implements Initializable {
@FXML private AnchorPane apCSV;
@FXML private Pane paneONE;
@FXML public TextField txfFName;
@FXML public TextField txfLName;
@FXML public TextField txfPNum;
@FXML public TextField txfEMail;
@FXML private VBox vbxDir;
@FXML public TableView<Person> table;
@FXML public TableColumn<Person, String> tblColFName;
@FXML public TableColumn<Person, String> tblColLName;
@FXML public TableColumn<Person, String> tblColPNum;
@FXML public TableColumn<Person, String> tblColEMail;
FileChooser fc = new FileChooser();
public ArrayList<Contacts> list;
private ListIterator<Contacts> LIT;
private int i;
public ArrayList<Person> plist;
public ObservableList<Person> data;
@FXML
private void onDir(ActionEvent e) {
vbxDir.setVisible(true);
vbxDir.toFront();
}
@FXML
private void onClose(ActionEvent e) {
vbxDir.setVisible(false);
}
@FXML//Load CSV Data
private void onLoad(ActionEvent e)throws IOException {
File fileInfo = new File("C:/A_CSV/People.csv");
if(fileInfo.length()==0) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("No Data in File at "+ fileInfo+"\n"+
"Enter Data and Save");
alert.showAndWait();
return;
}
fc.setTitle("Load Contacts Info");
fc.setInitialDirectory(new File("C:/"));
fc.setInitialDirectory(new File("C:/A_CSV"));
fc.setInitialFileName("People.csv");
File file = fc.showOpenDialog(null);
if (file == null) {
return;
}
String correctFile = file.getName();
if(!(correctFile.matches("People.csv"))){
Alert alert = new Alert(Alert.AlertType.ERROR);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("The File at " + file + "\n\n"+
"is NOT accociated with this application\n\n"+
"Select the File at "+fileInfo);
alert.showAndWait();
return;
}
Path dirP = Paths.get(String.valueOf(file));
InputStream in = Files.newInputStream(dirP);
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
list = new ArrayList<Contacts>();
plist = new ArrayList<Person>();
Scanner scan = new Scanner(reader);
scan.useDelimiter("\\s*,\\s*");
while (scan.hasNext()){
String fname = scan.next();
String lname = scan.next();
String pnum = scan.next();
String email = scan.next();
txfFName.setText(String.valueOf(fname));
txfLName.setText(String.valueOf(lname));
txfPNum.setText(String.valueOf(pnum));
txfEMail.setText(String.valueOf(email));
list.add(new Contacts(fname,lname,pnum,email));
plist.add(new Person(fname,lname,pnum,email));
data = FXCollections.observableList(plist);
table = new TableView<>();
table.setItems(data);
TableColumn<Person,String> tblColFName = new TableColumn<>("First Name");
tblColFName.setCellValueFactory(new PropertyValueFactory<>("vfname"));
tblColFName.setCellFactory(TextFieldTableCell.forTableColumn());
tblColFName.setOnEditCommit(new EventHandler<CellEditEvent<Person, String>>() {
@Override
public void handle(CellEditEvent<Person, String> t) {
t.getTableView().getItems()
.get(t.getTablePosition().getRow())
.setFName(t.getNewValue());
}
});
TableColumn<Person,String> tblColLName = new TableColumn<>("Last Name");
tblColLName.setCellValueFactory(new PropertyValueFactory<>("vlname"));
tblColLName.setCellFactory(TextFieldTableCell.forTableColumn());
tblColLName.setOnEditCommit(new EventHandler<CellEditEvent<Person, String>>() {
@Override
public void handle(CellEditEvent<Person, String> t) {
t.getTableView().getItems()
.get(t.getTablePosition().getRow())
.setLName(t.getNewValue());
}
});
TableColumn<Person,String> tblColPNum = new TableColumn<>("Phone Number");
tblColPNum.setCellValueFactory(new PropertyValueFactory<>("vpnum"));
tblColPNum.setCellFactory(TextFieldTableCell.forTableColumn());
tblColPNum.setOnEditCommit(new EventHandler<CellEditEvent<Person, String>>() {
@Override
public void handle(CellEditEvent<Person, String> t) {
t.getTableView().getItems()
.get(t.getTablePosition().getRow())
.setPNum(t.getNewValue());
}
});
TableColumn<Person,String> tblColEMail = new TableColumn<>("Email Address");
tblColEMail.setCellValueFactory(new PropertyValueFactory<>("vemail"));
tblColEMail.setCellFactory(TextFieldTableCell.forTableColumn());
tblColEMail.setOnEditCommit(new EventHandler<CellEditEvent<Person, String>>() {
@Override
public void handle(CellEditEvent<Person, String> t) {
t.getTableView().getItems()
.get(t.getTablePosition().getRow())
.setEMail(t.getNewValue());
}
});
//System.out.println(list.size());//2
//System.out.println(plist.containsAll(data));//true
//System.out.println(plist.size());//2
}
scan.close();
LIT = list.listIterator();
if (LIT.hasNext()){
Contacts p = LIT.next();
getContacts(p);
}
}
@FXML//This code removes data from the ArrayList and RE-Writes to the
//People.csv file the file is deleted first then rewritten
private void onRemove(ActionEvent e)throws IOException{
if(txfFName.getText().isEmpty()||txfLName.getText().isEmpty()||txfPNum.getText().isEmpty()||txfEMail.getText().isEmpty()) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("No Data Present to REMOVE\n"+
"Click LOAD to Obtain Data");
alert.showAndWait();
return;
}
list.get(i);
list.remove(i);
if(0 == list.size()){
Path path = FileSystems.getDefault().getPath("C:/A_CSV", "People.csv");
Files.delete(path);
onClear(e);
list.clear();
return;
}else if(i == list.size()){
i = i - 1;
}
Contacts p = list.get(i);
getContacts(p);
Contacts dat;
for(int r = 0; r <list.size(); r++){
dat = list.get(r);
}
Path path = FileSystems.getDefault().getPath("C:/A_CSV", "People.csv");
Files.delete(path);
File file = new File("C:/A_CSV/People.csv");
if(!file.exists()){
file.createNewFile();
}
FileWriter fileWriter = new FileWriter(file.getPath(),true);
BufferedWriter bufferWritter = new BufferedWriter(fileWriter);
Iterator<Contacts> LIT = list.iterator();
while(LIT.hasNext()) {
dat = LIT.next();
String d = dat.toString();
bufferWritter.write(d);
}
bufferWritter.close();
onClear(e);
//list.clear();//this is done by onClear(e)
txfFName.requestFocus();
}
@FXML//Scroll forward through the ArrayList
private void onNext(ActionEvent e) {
if (list == null || list.size() == 0) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("Load Data First");
alert.showAndWait();
return;
}
if (i == list.size()- 1) {
i = 0;
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("Last Record in File");
alert.showAndWait();
i= list.size()-1;
return;
}else {
i = i + 1;
}
Contacts p = list.get(i);
getContacts(p);
}
@FXML//Scroll backwards through the ArrayList
private void onPrevious(ActionEvent e) {
if (list == null || list.size() == 0) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("Load Data First");
alert.showAndWait();
return;
}
if (i == 0) {
i = list.size()-1;
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("First Record in File");
alert.showAndWait();
i=0;
return;
}else {
i = i - 1 ;
}
Contacts p = list.get(i);
getContacts(p);
}
//Helper for Contacts Class
private void getContacts(Contacts p){
txfFName.setText("" + p.getFName());
txfLName.setText("" + p.getLName());
txfPNum.setText ("" + p.getPnum());
txfEMail.setText("" + p.getEmail());
}
@FXML
private void oneSave(ActionEvent e) throws IOException{
if(txfFName.getText().isEmpty() || txfLName.getText().isEmpty() || txfPNum.getText().isEmpty() || txfEMail.getText().isEmpty()) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("No DATA entered\n"+
"ENTER new data and Alt + S to SAVE");
alert.showAndWait();
if(txfFName.getText().isEmpty()) {
txfFName.requestFocus();
return;
}
if(txfLName.getText().isEmpty()) {
txfLName.requestFocus();
return;
}
if(txfPNum.getText().isEmpty()) {
txfPNum.requestFocus();
return;
}
if(txfEMail.getText().isEmpty()) {
txfEMail.requestFocus();
return;
}
}
String fname = txfFName.getText().trim();
String lname = txfLName.getText().trim();
String pnum = txfPNum.getText().trim();
String email = txfEMail.getText().trim();
String data = (fname + "," + lname + "," + pnum + "," + email + "," + '\r');
File dirPath = new File("C:/A_CSV");
dirPath.mkdirs();//Make the directory
File file = new File(dirPath,"People.csv");
if(!file.exists()){
file.createNewFile();//Create and empty text file
}
Alert alert1 = new Alert(AlertType.CONFIRMATION);
alert1.setTitle("Confirm Save");
alert1.setHeaderText("");
alert1.setContentText("Select OK to Save Data");
//Alert Do You Want to SAVE
Optional<ButtonType> result = alert1.showAndWait();
if (result.get() == ButtonType.OK){
FileWriter fileWriter = new FileWriter(file.getPath(),true);
try (BufferedWriter bufferWritter = new BufferedWriter(fileWriter)) {
bufferWritter.write(data);
//Alert that you did SAVE too many Alerts!
Alert alert = new Alert(AlertType.INFORMATION);
alert.setTitle("Information Dialog");
alert.setHeaderText(null);
alert.setContentText("Data Saved");
alert.showAndWait();
txfFName.setText("");
txfLName.setText("");
txfPNum.setText("");
txfEMail.setText("");
txfFName.requestFocus();
}
} else {
return;
//if you did not save do we clear the entered data ?
// ... user chose CANCEL or closed the dialog
}
}
@FXML//Clear Fields and ArrayList
private void onClear(ActionEvent e) {
if(txfFName.getText().isEmpty()||txfLName.getText().isEmpty()||txfPNum.getText().isEmpty()||txfEMail.getText().isEmpty()) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("No Data Present to CLEAR\n"+
"Click LOAD to Obtain Data");
alert.showAndWait();
return;
}
i=0;
list.clear();
txfFName.setText("");
txfLName.setText("");
txfPNum.setText("");
txfEMail.setText("");
txfFName.requestFocus();
}
@Override
public void initialize(URL arg0, ResourceBundle arg1) {
//table.setPlaceholder(new Label("No visible columns and/or data exist."));
}
}
Contacts Class
package appCSVFile;
public class Contacts {
private String FName;
private String LName;
private String PNum;
private String EMail;
//public Contacts(String pFname, String pLname, String pPnum, String pEmail) {
//super();
//this.FName = pFname;
//this.LName = pLname;
//this.PNum = pPnum;
//this.EMail = pEmail;
//}
public Contacts(String pFname,String pLname, String pPnum, String pEmail){
FName = pFname;
LName = pLname;
PNum = pPnum;
EMail = pEmail;
}
@Override
public String toString(){
return FName + "," +
LName + "," +
PNum + "," +
EMail + "," + '\r' ;
}
public String toFile(){
return FName + "," + LName + "," + PNum + "," + EMail + "," +'\r';
}
public String getFName(){
return FName;
}
public String getLName(){
return LName;
}
public String getPnum(){
return PNum;
}
public String getEmail(){
return EMail;
}
}
Person Class
package appCSVFile;
import javafx.beans.property.SimpleStringProperty;
public class Person {
private SimpleStringProperty vfname;
private SimpleStringProperty vlname;
private SimpleStringProperty vpnum;
private SimpleStringProperty vemail;
public Person () {
}
public Person (String s1, String s2, String s3, String s4) {
vfname = new SimpleStringProperty(s1);
vlname = new SimpleStringProperty(s2);
vpnum = new SimpleStringProperty(s3);
vemail = new SimpleStringProperty(s4);
//System.out.println(s1);//This produces data
//System.out.println(vfname);//as does this StringProperty [value: what ever s1]
}
public String getFName() {
return vfname.get();
}
public void setFName(String s1) {
vfname.set(s1);
}
public String getLName() {
return vlname.get();
}
public void setLName(String s2) {
vlname.set(s2);
}
public String getPNum() {
return vpnum.get();
}
public void setPNum(String s3) {
vpnum.set(s3);
}
public String getEMail() {
return vemail.get();
}
public void setEMail(String s4) {
vemail.set(s4);
}
}
FXML class
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.input.*?>
<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane fx:id="apCSV" prefHeight="650.0" prefWidth="1040.0"
xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1"
fx:controller="appCSVFile.CSVController">
<children>
<Pane fx:id="paneONE" prefHeight="650.0" prefWidth="1040.0"
style="-fx-background-color: lightgray;" AnchorPane.bottomAnchor="0.0"
AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0"
AnchorPane.topAnchor="0.0">
<children>
<MenuBar style="-fx-background-color: lightgray;">
<menus>
<Menu mnemonicParsing="false" text="File">
<items>
<MenuItem mnemonicParsing="false" onAction="#onLoad"
text="Load">
<accelerator>
<KeyCodeCombination alt="ANY" code="L"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
<MenuItem mnemonicParsing="false" onAction="#oneSave"
text="Save">
<accelerator>
<KeyCodeCombination alt="ANY" code="S"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
</items>
</Menu>
<Menu mnemonicParsing="false" text="Edit">
<items>
<MenuItem mnemonicParsing="false" onAction="#onRemove"
text="Remove">
<accelerator>
<KeyCodeCombination alt="ANY" code="R"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
<MenuItem mnemonicParsing="false" onAction="#onClear"
text="Clear">
<accelerator>
<KeyCodeCombination alt="ANY" code="C"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
</items>
</Menu>
<Menu mnemonicParsing="false" text="Navigate">
<items>
<MenuItem mnemonicParsing="false" onAction="#onNext"
text="Forward">
<accelerator>
<KeyCodeCombination alt="ANY" code="F"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
<MenuItem mnemonicParsing="false" onAction="#onPrevious"
text="Previous">
<accelerator>
<KeyCodeCombination alt="ANY" code="P"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
</items>
</Menu>
<Menu mnemonicParsing="false" text="Help">
<items>
<MenuItem mnemonicParsing="false" onAction="#onDir"
text="Directions" />
<MenuItem mnemonicParsing="false" text="About" />
</items>
</Menu>
</menus>
</MenuBar>
<Label focusTraversable="false" layoutX="50.0" layoutY="73.0"
text="First Name">
<font>
<Font size="18.0" />
</font>
</Label>
<TextField fx:id="txfFName" layoutX="150.0" layoutY="70.0"
style="-fx-font-weight: bold;" />
<Label focusTraversable="false" layoutX="370.0" layoutY="73.0"
text="Last Name">
<font>
<Font size="18.0" />
</font>
</Label>
<TextField fx:id="txfLName" layoutX="470.0" layoutY="70.0"
prefHeight="28.0" prefWidth="230.0" style="-fx-font-weight: bold;" />
<Label focusTraversable="false" layoutX="50.0" layoutY="113.0"
text="Phone Number">
<font>
<Font size="18.0" />
</font>
</Label>
<TextField fx:id="txfPNum" layoutX="179.0" layoutY="110.0"
prefHeight="28.0" prefWidth="164.0" style="-fx-font-weight: bold;"
text="505-412-7650" />
<Label focusTraversable="false" layoutX="405.0" layoutY="113.0"
text="E-Mail">
<font>
<Font size="18.0" />
</font>
</Label>
<TextField fx:id="txfEMail" layoutX="470.0" layoutY="110.0"
prefHeight="28.0" prefWidth="230.0" style="-fx-font-weight: bold;" />
<VBox fx:id="vbxDir" alignment="TOP_CENTER" layoutX="150.0"
layoutY="163.0" prefHeight="240.0" prefWidth="190.0" visible="false">
<children>
<Button focusTraversable="false" mnemonicParsing="false"
onAction="#onClose" style="-fx-font-weight: bold;" text="CLOSE" />
<TextArea focusTraversable="false" prefHeight="215.0"
prefWidth="190.0"
style="-fx-border-width: 2; -fx-border-color: blue; -fx-font-weight: bold;"
text=" Shortcut Directions Alt + L to Load Alt + S to Save Alt + R to Remove Alt + C to Clear Alt + F Scroll Next Alt + P Scroll Previous" />
</children>
</VBox>
<TableView fx:id="table" editable="true" layoutX="68.0"
layoutY="190.0" prefHeight="200.0" prefWidth="855.0">
<columns>
<TableColumn fx:id="tblColFName" maxWidth="200.0"
minWidth="200.0" prefWidth="200.0" text="First Name" />
<TableColumn fx:id="tblColLName" maxWidth="240.0"
minWidth="240.0" prefWidth="240.0" text="Last Name" />
<TableColumn fx:id="tblColPNum" maxWidth="175.0"
minWidth="175.0" prefWidth="175.0" text="Phone Number" />
<TableColumn fx:id="tblColEMail" maxWidth="240.0"
minWidth="240.0" prefWidth="240.0" text="Email Address" />
</columns>
</TableView>
</children>
</Pane>
</children>
</AnchorPane>
答案 0 :(得分：0)
@James_Duh你的方向很好但是@James_D说了很多错误。我已经重新编写了代码，并提供了查看Book Learn JavaFX 8的建议，它非常完整。对于一个6年级的学生，你有完整的代码保持它
Main Class
package appCSVFile;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.fxml.FXMLLoader;
public class CSVMain extends Application {
@Override
public void start(Stage pStage) {
try {
AnchorPane root = (AnchorPane)FXMLLoader.load(getClass().getResource("csv.fxml"));
Scene scene = new Scene(root,1040,650);
pStage.setScene(scene);
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
pStage.setResizable(false);
pStage.setTitle("CSV File Demo");
pStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
}
Controller Class
package appCSVFile;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.ListIterator;
import java.util.Optional;
import java.util.ResourceBundle;
import java.util.Scanner;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Alert;
import javafx.scene.control.ButtonType;
import javafx.scene.control.Label;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.stage.FileChooser;
public class CSVController implements Initializable {
@FXML private AnchorPane apCSV;
@FXML private Pane paneONE;
@FXML public TextField txfFName;
@FXML public TextField txfLName;
@FXML public TextField txfPNum;
@FXML public TextField txfEMail;
@FXML private VBox vbxDir;
@FXML public TableView<Person> table;
@FXML public TableColumn <Person,String> firstNameColumn;
@FXML public TableColumn <Person,String> lastNameColumn;
@FXML public TableColumn <Person,String> phoneNumberColumn;
@FXML public TableColumn <Person,String> emailAddressColumn;
FileChooser fc = new FileChooser();
public ArrayList<Contacts> list;
private ListIterator<Contacts> LIT;
private int i;
public ObservableList<Person> data;
@FXML
private void onDir(ActionEvent e) {
vbxDir.setVisible(true);
vbxDir.toFront();
}
@FXML
private void onClose(ActionEvent e) {
vbxDir.setVisible(false);
}
@FXML//Load CSV Data
private void onLoad(ActionEvent e)throws IOException {
data = FXCollections.observableArrayList();//Hold data for the table
File fileInfo = new File("C:/A_CSV/People.csv");
if(fileInfo.length()==0) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("No Data in File at "+ fileInfo+"\n"+
"Enter Data and Save");
alert.showAndWait();
return;
}
fc.setTitle("Load Contacts Info");
fc.setInitialDirectory(new File("C:/"));
fc.setInitialDirectory(new File("C:/A_CSV"));
fc.setInitialFileName("People.csv");
File file = fc.showOpenDialog(null);
if (file == null) {
return;
}
String correctFile = file.getName();
if(!(correctFile.matches("People.csv"))){
Alert alert = new Alert(Alert.AlertType.ERROR);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("The File at " + file + "\n\n"+
"is NOT accociated with this application\n\n"+
"Select the File at "+fileInfo);
alert.showAndWait();
return;
}
Path dirP = Paths.get(String.valueOf(file));
InputStream in = Files.newInputStream(dirP);
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
list = new ArrayList<Contacts>();
Scanner scan = new Scanner(reader);
scan.useDelimiter("\\s*,\\s*");
while (scan.hasNext()){
String fname = scan.next();
String lname = scan.next();
String pnum = scan.next();
String email = scan.next();
txfFName.setText(String.valueOf(fname));
txfLName.setText(String.valueOf(lname));
txfPNum.setText(String.valueOf(pnum));
txfEMail.setText(String.valueOf(email));
list.add(new Contacts(fname,lname,pnum,email));
data.add(new Person(fname,lname,pnum,email));
table.setItems(data);
firstNameColumn.setCellValueFactory(cellData -> cellData.getValue().firstNameProperty());
lastNameColumn.setCellValueFactory(cellData -> cellData.getValue().lastNameProperty());
phoneNumberColumn.setCellValueFactory(cellData -> cellData.getValue().phoneNumberProperty());
emailAddressColumn.setCellValueFactory(cellData -> cellData.getValue().emailAddressProperty());
}
scan.close();
LIT = list.listIterator();
if (LIT.hasNext()){
Contacts p = LIT.next();
getContacts(p);
}
}
@FXML//This code removes data from the ArrayList and RE-Writes to the
//People.csv file the file is deleted first then rewritten
private void onRemove(ActionEvent e)throws IOException{
if(txfFName.getText().isEmpty()||txfLName.getText().isEmpty()||txfPNum.getText().isEmpty()||txfEMail.getText().isEmpty()) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("No Data Present to REMOVE\n"+
"Click LOAD to Obtain Data");
alert.showAndWait();
return;
}
list.get(i);
list.remove(i);
if(0 == list.size()){
Path path = FileSystems.getDefault().getPath("C:/A_CSV", "People.csv");
Files.delete(path);
onClear(e);
list.clear();
return;
}else if(i == list.size()){
i = i - 1;
}
Contacts p = list.get(i);
getContacts(p);
Contacts dat;
for(int r = 0; r <list.size(); r++){
dat = list.get(r);
}
Path path = FileSystems.getDefault().getPath("C:/A_CSV", "People.csv");
Files.delete(path);
File file = new File("C:/A_CSV/People.csv");
if(!file.exists()){
file.createNewFile();
}
FileWriter fileWriter = new FileWriter(file.getPath(),true);
BufferedWriter bufferWritter = new BufferedWriter(fileWriter);
Iterator<Contacts> LIT = list.iterator();
while(LIT.hasNext()) {
dat = LIT.next();
String d = dat.toString();
bufferWritter.write(d);
}
bufferWritter.close();
onClear(e);
//list.clear();//this is done by onClear(e)
txfFName.requestFocus();
}
@FXML//Scroll forward through the ArrayList
private void onNext(ActionEvent e) {
if (list == null || list.size() == 0) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("Load Data First");
alert.showAndWait();
return;
}
if (i == list.size()- 1) {
i = 0;
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("Last Record in File");
alert.showAndWait();
i= list.size()-1;
return;
}else {
i = i + 1;
}
Contacts p = list.get(i);
getContacts(p);
}
@FXML//Scroll backwards through the ArrayList
private void onPrevious(ActionEvent e) {
if (list == null || list.size() == 0) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("Load Data First");
alert.showAndWait();
return;
}
if (i == 0) {
i = list.size()-1;
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("First Record in File");
alert.showAndWait();
i=0;
return;
}else {
i = i - 1 ;
}
Contacts p = list.get(i);
getContacts(p);
}
//Helper for Contacts Class
private void getContacts(Contacts p){
txfFName.setText("" + p.getFName());
txfLName.setText("" + p.getLName());
txfPNum.setText ("" + p.getPnum());
txfEMail.setText("" + p.getEmail());
}
@FXML
private void oneSave(ActionEvent e) throws IOException{
if(txfFName.getText().isEmpty() || txfLName.getText().isEmpty() || txfPNum.getText().isEmpty() || txfEMail.getText().isEmpty()) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("No DATA entered\n"+
"ENTER new data and Alt + S to SAVE");
alert.showAndWait();
if(txfFName.getText().isEmpty()) {
txfFName.requestFocus();
return;
}
if(txfLName.getText().isEmpty()) {
txfLName.requestFocus();
return;
}
if(txfPNum.getText().isEmpty()) {
txfPNum.requestFocus();
return;
}
if(txfEMail.getText().isEmpty()) {
txfEMail.requestFocus();
return;
}
}
String fname = txfFName.getText().trim();
String lname = txfLName.getText().trim();
String pnum = txfPNum.getText().trim();
String email = txfEMail.getText().trim();
String data = (fname + "," + lname + "," + pnum + "," + email + "," + '\r');
File dirPath = new File("C:/A_CSV");
dirPath.mkdirs();//Make the directory
File file = new File(dirPath,"People.csv");
if(!file.exists()){
file.createNewFile();//Create and empty text file
}
Alert alert1 = new Alert(AlertType.CONFIRMATION);
alert1.setTitle("Confirm Save");
alert1.setHeaderText("");
alert1.setContentText("Select OK to Save Data");
//Alert Do You Want to SAVE
Optional<ButtonType> result = alert1.showAndWait();
if (result.get() == ButtonType.OK){
FileWriter fileWriter = new FileWriter(file.getPath(),true);
try (BufferedWriter bufferWritter = new BufferedWriter(fileWriter)) {
bufferWritter.write(data);
//Alert that you did SAVE too many Alerts!
Alert alert = new Alert(AlertType.INFORMATION);
alert.setTitle("Information Dialog");
alert.setHeaderText(null);
alert.setContentText("Data Saved");
alert.showAndWait();
txfFName.setText("");
txfLName.setText("");
txfPNum.setText("");
txfEMail.setText("");
txfFName.requestFocus();
table.getItems().clear();//Clears the table
}
} else {
return;
//if you did not save do we clear the entered data ?
// ... user chose CANCEL or closed the dialog
}
}
@FXML//Clear Fields and ArrayList
private void onClear(ActionEvent e) {
if(txfFName.getText().isEmpty()||txfLName.getText().isEmpty()||txfPNum.getText().isEmpty()||txfEMail.getText().isEmpty()) {
Alert alert = new Alert(Alert.AlertType.WARNING);
alert.setTitle("Information");
alert.setHeaderText("");
alert.setContentText("No Data Present to CLEAR\n"+
"Click LOAD to Obtain Data");
alert.showAndWait();
return;
}
table.getItems().clear();
i=0;
list.clear();
txfFName.setText("");
txfLName.setText("");
txfPNum.setText("");
txfEMail.setText("");
txfFName.requestFocus();
}
@Override
public void initialize(URL arg0, ResourceBundle arg1) {
table.setPlaceholder(new Label("Select Help then Click Directions or Alt + L to Load Data"));
}
}
Contacts Class
package appCSVFile;
public class Contacts {
private String FName;
private String LName;
private String PNum;
private String EMail;
//public Contacts(String pFname, String pLname, String pPnum, String pEmail) {
//super();
//this.FName = pFname;
//this.LName = pLname;
//this.PNum = pPnum;
//this.EMail = pEmail;
//}
public Contacts(String pFname,String pLname, String pPnum, String pEmail){
FName = pFname;
LName = pLname;
PNum = pPnum;
EMail = pEmail;
}
@Override
public String toString(){
return FName + "," +
LName + "," +
PNum + "," +
EMail + "," + '\r' ;
}
public String toFile(){
return FName + "," + LName + "," + PNum + "," + EMail + "," +'\r';
}
public String getFName(){
return FName;
}
public String getLName(){
return LName;
}
public String getPnum(){
return PNum;
}
public String getEmail(){
return EMail;
}
}
Person Class
package appCSVFile;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
public class Person {
//This belongs to CSV Controller
//===============================
private final StringProperty firstName = new SimpleStringProperty(this, "firstName", null);
private final StringProperty lastName = new SimpleStringProperty(this, "lastName", null);
private final StringProperty phoneNumber = new SimpleStringProperty(this, "phoneNumber", null);
private final StringProperty emailAddress = new SimpleStringProperty(this, "emailAddress", null);
public Person() {
this(null, null, null,null);
}
public Person(String firstName, String lastName, String phoneNumber,String emailAddress) {
this.firstName.set(firstName);
this.lastName.set(lastName);
this.phoneNumber.set(phoneNumber);
this.emailAddress.set(emailAddress);
}
/* firstName Property */
public final String getFirstName() {//1
return firstName.get();
}
public final void setFirstName(String firstName) {//1
firstNameProperty().set(firstName);
}
public final StringProperty firstNameProperty() {//1
return firstName;
}
public final String getLasttName() {//2
return lastName.get();
}
public final void setLastName(String lastName) {//2
lastNameProperty().set(lastName);
}
public final StringProperty lastNameProperty() {//2
return lastName;
}
public final String getPhoneNumber() {//3
return phoneNumber.get();
}
public final void setPhoneNumber(String phoneNumber) {//3
phoneNumberProperty().set(phoneNumber);
}
public final StringProperty phoneNumberProperty() {//3
return phoneNumber;
}
public final String getEmailAddress() {
return emailAddress.get();
}
public final void setEmailAddress(String emailAddress) {
emailAddressProperty().set(emailAddress);
}
public final StringProperty emailAddressProperty() {
return emailAddress;
}
}
FXML file
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.input.*?>
<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane fx:id="apCSV" prefHeight="650.0" prefWidth="1040.0"
xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1"
fx:controller="appCSVFile.CSVController">
<children>
<Pane fx:id="paneONE" prefHeight="650.0" prefWidth="1040.0"
style="-fx-background-color: lightgray;" AnchorPane.bottomAnchor="0.0"
AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0"
AnchorPane.topAnchor="0.0">
<children>
<MenuBar style="-fx-background-color: lightgray;">
<menus>
<Menu mnemonicParsing="false" text="File">
<items>
<MenuItem mnemonicParsing="false" onAction="#onLoad"
text="Load">
<accelerator>
<KeyCodeCombination alt="ANY" code="L"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
<MenuItem mnemonicParsing="false" onAction="#oneSave"
text="Save">
<accelerator>
<KeyCodeCombination alt="ANY" code="S"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
</items>
</Menu>
<Menu mnemonicParsing="false" text="Edit">
<items>
<MenuItem mnemonicParsing="false" onAction="#onRemove"
text="Remove">
<accelerator>
<KeyCodeCombination alt="ANY" code="R"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
<MenuItem mnemonicParsing="false" onAction="#onClear"
text="Clear">
<accelerator>
<KeyCodeCombination alt="ANY" code="C"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
</items>
</Menu>
<Menu mnemonicParsing="false" text="Navigate">
<items>
<MenuItem mnemonicParsing="false" onAction="#onNext"
text="Forward">
<accelerator>
<KeyCodeCombination alt="ANY" code="F"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
<MenuItem mnemonicParsing="false" onAction="#onPrevious"
text="Previous">
<accelerator>
<KeyCodeCombination alt="ANY" code="P"
control="UP" meta="UP" shift="UP" shortcut="UP" />
</accelerator>
</MenuItem>
</items>
</Menu>
<Menu mnemonicParsing="false" text="Help">
<items>
<MenuItem mnemonicParsing="false" onAction="#onDir"
text="Directions" />
<MenuItem mnemonicParsing="false" text="About" />
</items>
</Menu>
</menus>
</MenuBar>
<Label focusTraversable="false" layoutX="50.0" layoutY="73.0"
text="First Name">
<font>
<Font size="18.0" />
</font>
</Label>
<TextField fx:id="txfFName" layoutX="150.0" layoutY="70.0"
style="-fx-font-weight: bold;" />
<Label focusTraversable="false" layoutX="370.0" layoutY="73.0"
text="Last Name">
<font>
<Font size="18.0" />
</font>
</Label>
<TextField fx:id="txfLName" layoutX="470.0" layoutY="70.0"
prefHeight="28.0" prefWidth="230.0" style="-fx-font-weight: bold;" />
<Label focusTraversable="false" layoutX="50.0" layoutY="113.0"
text="Phone Number">
<font>
<Font size="18.0" />
</font>
</Label>
<TextField fx:id="txfPNum" layoutX="179.0" layoutY="110.0"
prefHeight="28.0" prefWidth="164.0" style="-fx-font-weight: bold;"
text="505-412-7650" />
<Label focusTraversable="false" layoutX="405.0" layoutY="113.0"
text="E-Mail">
<font>
<Font size="18.0" />
</font>
</Label>
<TextField fx:id="txfEMail" layoutX="470.0" layoutY="110.0"
prefHeight="28.0" prefWidth="230.0" style="-fx-font-weight: bold;" />
<VBox fx:id="vbxDir" alignment="TOP_CENTER" layoutX="150.0"
layoutY="163.0" prefHeight="240.0" prefWidth="190.0" visible="false">
<children>
<Button focusTraversable="false" mnemonicParsing="false"
onAction="#onClose" style="-fx-font-weight: bold;" text="CLOSE" />
<TextArea focusTraversable="false" prefHeight="215.0"
prefWidth="190.0"
style="-fx-border-width: 2; -fx-border-color: blue; -fx-font-weight: bold;"
text=" Shortcut Directions Alt + L to Load Alt + S to Save Alt + R to Remove Alt + C to Clear Alt + F Scroll Next Alt + P Scroll Previous" />
</children>
</VBox>
<TableView fx:id="table" editable="true" layoutX="50.0"
layoutY="190.0" prefHeight="200.0" prefWidth="861.0">
<columns>
<TableColumn fx:id="firstNameColumn" editable="false"
maxWidth="200.0" minWidth="200.0" prefWidth="200.0" resizable="false"
sortable="false" text="First Name" />
<TableColumn fx:id="lastNameColumn" editable="false"
maxWidth="240.0" minWidth="240.0" prefWidth="240.0" resizable="false"
text="Last Name" />
<TableColumn fx:id="phoneNumberColumn" editable="false"
maxWidth="175.0" minWidth="175.0" prefWidth="175.0" resizable="false"
sortable="false" text="Phone Number" />
<TableColumn fx:id="emailAddressColumn" editable="false"
maxWidth="240.0" minWidth="240.0" prefWidth="240.0" resizable="false"
sortable="false" text="Email Address" />
</columns>
</TableView>
</children>
</Pane>
</children>
</AnchorPane>