javafx tableview如何在不使用类的情况下获取所选数据 [英] javafx tableview how to get selected data without using class
本文介绍了javafx tableview如何在不使用类的情况下获取所选数据的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在开发一个javafx项目，我想从tableview中获取所选数据，但我不想使用类，因为列数不固定。所以，请帮助我。
I am working on a javafx project and i want to get selected data from tableview but i don't want to use class because number of columns are not fixed .So, please help me.
例如：
public static class IdentifiedName {
private final int id;
private final String name;
private IdentifiedName(int id, String name) {
this.id = id;
this.name = name;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
}
此类只能用于两个列表，但是在我的项目中，客户可以根据需要添加列，所以请帮我从tableview中选择数据
This class can only be use for two column table , but in my project client can add column as per his need so please help me to get selected data from tableview
这里有更多代码：
import java.sql.Connection;
import java.sql.ResultSet;
import java.util.Map;
import javafx.application.Application;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.CheckBox;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableColumn.CellDataFeatures;
import javafx.scene.control.TablePosition;
import javafx.scene.control.TableView;
import javafx.scene.control.TableView.TableViewSelectionModel;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.stage.Stage;
import javafx.util.Callback;
import javafx.util.StringConverter;
public class DynamicTable extends Application{
Object newValue;
private ObservableList<ObservableList> data;
private TableView<ObservableList> tableview;
public static void main(String[] args) {
launch(args);
}
//CONNECTION DATABASE
public void buildData(){
Connection c ;
data = FXCollections.observableArrayList();
try{
c = DBConnect.connect();
//SQL FOR SELECTING ALL OF CUSTOMER
String SQL = "SELECT * from CUSTOMer";
//ResultSet
ResultSet rs = c.createStatement().executeQuery(SQL);
/**********************************
* TABLE COLUMN ADDED DYNAMICALLY *
**********************************/
for(int i=0 ; i<rs.getMetaData().getColumnCount(); i++){
//We are using non property style for making dynamic table
final int j = i;
TableColumn col = new TableColumn(rs.getMetaData().getColumnName(i+1));
col.setCellValueFactory(new Callback<CellDataFeatures<ObservableList,String>,ObservableValue<String>>(){
public ObservableValue<String> call(CellDataFeatures<ObservableList, String> param) {
return new SimpleStringProperty(param.getValue().get(j).toString());
}
});
tableview.getColumns().addAll(col);
tableview.setEditable(true);
Callback<TableColumn<Map, String>, TableCell<Map, String>>
cellFactoryForMap = new Callback<TableColumn<Map, String>,
TableCell<Map, String>>() {
@Override
public TableCell call(TableColumn p) {
return new TextFieldTableCell(new StringConverter() {
@Override
public String toString(Object t) {
return t.toString();
}
@Override
public Object fromString(String string) {
return string;
}
});
}
};
if(j!=1)
col.setCellFactory(cellFactoryForMap);
System.out.println("Column ["+i+"] ");
}
/********************************
* Data added to ObservableList *
********************************/
while(rs.next()){
//Iterate Row
ObservableList<String> row = FXCollections.observableArrayList();
for(int i=1 ; i<=rs.getMetaData().getColumnCount(); i++){
//Iterate Column
row.add(rs.getString(i));
}
System.out.println("Row [1] added "+row );
data.add(row);
}
//FINALLY ADDED TO TableView
tableview.setItems(data);
}catch(Exception e){
e.printStackTrace();
System.out.println("Error on Building Data");
}
}
@Override
public void start(Stage stage) throws Exception {
//TableView
tableview = new TableView();
buildData();
//Main Scene
Scene scene = new Scene(tableview);
stage.setScene(scene);
stage.show();
tableview.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observableValue, Object oldValue, Object newValue) {
//Check whether item is selected and set value of selected item to Label
if(tableview.getSelectionModel().getSelectedItem() != null)
{
TableViewSelectionModel selectionModel = tableview.getSelectionModel();
ObservableList selectedCells = selectionModel.getSelectedCells();
TablePosition tablePosition = (TablePosition) selectedCells.get(0);
Object val = tablePosition.getTableColumn().getCellData(newValue);
System.out.println("Selected Value" + val);
}
}
});
TableColumn col_action = new TableColumn<>("Action");
col_action.setSortable(false);
col_action.setCellValueFactory(
new Callback<TableColumn.CellDataFeatures<JavaFXDynTable2.Record, Boolean>,
ObservableValue<Boolean>>() {
@Override
public ObservableValue<Boolean> call(TableColumn.CellDataFeatures<JavaFXDynTable2.Record, Boolean> p) {
return new SimpleBooleanProperty(p.getValue() != null);
}
});
col_action.setCellFactory(
new Callback<TableColumn<JavaFXDynTable2.Record, Boolean>, TableCell<JavaFXDynTable2.Record, Boolean>>() {
@Override
public TableCell<JavaFXDynTable2.Record, Boolean> call(TableColumn<JavaFXDynTable2.Record, Boolean> p) {
return new ButtonCell(tableview);
}
});
tableview.getColumns().add(col_action);
}
private class ButtonCell extends TableCell<JavaFXDynTable2.Record, Boolean> {
final CheckBox cellButton = new CheckBox();
ButtonCell(final TableView tblView){
cellButton.setOnAction(new EventHandler<ActionEvent>(){
@Override
public void handle(ActionEvent t) {
}
});
}
//Display button if the row is not empty
@Override
protected void updateItem(Boolean t, boolean empty) {
super.updateItem(t, empty);
if(!empty){
setGraphic(cellButton);
}
}
}
}
推荐答案
问题不是错误，但在发布代码之前修复这些错误很好，这是我没有的数据库。
The problem wasn't errors, but it's good to fix those before posting code, it was the database which I don't have.
我更改了它，因此你的表使用 ObservableList< String> ，因为那是你正在使用的，最好在表格中指定结构。
I changed it so your table uses ObservableList<String> since that's what you're using and it's best to specify the structure in the table.
只有在路径中有H2 jar或在项目中将其设置为库时才会运行。您可以删除该部分代码，只使用您的数据库。
This will only run if you have H2 jar in your path or set it as a library in your project. You can remove that part of the code and just use your database.
package dynamictable;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Map;
import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableColumn.CellDataFeatures;
import javafx.scene.control.TablePosition;
import javafx.scene.control.TableView;
import javafx.scene.control.TableView.TableViewSelectionModel;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.stage.Stage;
import javafx.util.Callback;
import javafx.util.StringConverter;
public class DynamicTable extends Application{
private ObservableList<ObservableList<String>> data;
private TableView<ObservableList<String>> tableview;
//CONNECTION DATABASE
public void buildData() {
data = FXCollections.observableArrayList();
try {
DriverManager.registerDriver(new org.h2.Driver());
Connection c = DriverManager.getConnection("jdbc:h2:mem:");
//or you can use derby in your jdk folder
//DriverManager.registerDriver(new org.apache.derby.jdbc.EmbeddedDriver());
//Connection c = DriverManager.getConnection("jdbc:derby:memory:myDB;create=true");
Statement stmt = c.createStatement();
String sql = "CREATE TABLE CUSTOMER (num INTEGER, name VARCHAR(255), address VARCHAR(255))";
stmt.executeUpdate(sql);
for (int i = 0; i < 10; i++) {
sql = "INSERT INTO CUSTOMER VALUES (" + i + ",'1st string in row " + i + "','2nd string in row " + i + "')";
stmt.executeUpdate(sql);
}
//c = DBConnect.connect();
//SQL FOR SELECTING ALL OF CUSTOMER
String SQL = "SELECT * from CUSTOMER";
//ResultSet
ResultSet rs = c.createStatement().executeQuery(SQL);
/**
* ********************************
* TABLE COLUMN ADDED DYNAMICALLY *
*********************************
*/
for (int i = 0; i < rs.getMetaData().getColumnCount(); i++) {
//We are using non property style for making dynamic table
final int j = i;
TableColumn col = new TableColumn(rs.getMetaData().getColumnName(i + 1));
col.setCellValueFactory(new Callback<CellDataFeatures<ObservableList<String>, String>, ObservableValue<String>>() {
public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> param) {
return new SimpleStringProperty(param.getValue().get(j));
}
});
tableview.getColumns().add(col);
Callback<TableColumn<Map, String>, TableCell<Map, String>> cellFactoryForMap
= new Callback<TableColumn<Map, String>, TableCell<Map, String>>() {
@Override
public TableCell call(TableColumn p) {
return new TextFieldTableCell(new StringConverter() {
@Override
public String toString(Object t) {
return t.toString();
}
@Override
public Object fromString(String string) {
return string;
}
});
}
};
if (j != 1) {
col.setCellFactory(cellFactoryForMap);
}
System.out.println("Column [" + i + "] ");
}
/**
* ******************************
* Data added to ObservableList *
*******************************
*/
while (rs.next()) {
//Iterate Row
ObservableList<String> row = FXCollections.observableArrayList();
for (int i = 1; i <= rs.getMetaData().getColumnCount(); i++) {
//Iterate Column
row.add(rs.getString(i));
}
System.out.println("Row [1] added " + row);
data.add(row);
}
rs.close();
c.close();
//FINALLY ADDED TO TableView
tableview.setItems(data);
} catch (Exception e) {
e.printStackTrace();
System.out.println("Error on Building Data");
}
}
@Override
public void start(Stage stage) throws Exception {
//TableView
tableview = new TableView();
tableview.setEditable(true);
tableview.getSelectionModel().setCellSelectionEnabled(true);
buildData();
//Main Scene
Scene scene = new Scene(tableview);
stage.setScene(scene);
stage.show();
tableview.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observableValue, Object oldValue, Object newValue) {
//Check whether item is selected and set value of selected item to Label
if (tableview.getSelectionModel().getSelectedItem() != null) {
TableViewSelectionModel selectionModel = tableview.getSelectionModel();
ObservableList selectedCells = selectionModel.getSelectedCells();
TablePosition tablePosition = (TablePosition) selectedCells.get(0);
Object val = tablePosition.getTableColumn().getCellData(newValue);
System.out.println("Selected Value " + val);
System.out.println("Selected row " + newValue);
}
}
});
System.out.println("");
System.out.println("List all data without using table");
for (ObservableList<String> ol : data){
System.out.print("row-> ");
for (String s : ol){
System.out.print(s+" ");
}
System.out.println("");
}
System.out.println("");
System.out.println("Show data at specific location in data");
System.out.println(" row 6 (index 5), column 2(index 1) -> "+data.get(5).get(1));
System.out.println("");
System.out.println("Show data at specific location in table");
System.out.println(" row 2, col 2 -> "+tableview.getItems().get(1).get(1));
}
public static void main(String[] args) {
launch(args);
}
}
这篇关于javafx tableview如何在不使用类的情况下获取所选数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
