a.SwingNode class: Encapsulates the Java swing component into a JavaFX Node, so that Java Swing can be nested with JavaFX. JavaSwing is ugly. , but the operation is simple. The table components of JavaFX (TableView, etc.) are a bit complicated, so choose nested JavaSwing to use it. Just be ugly
b.javacsv-2.0.jar: Used to read csv through file address file and can perform a series of operations. Although it will no longer be updated after 2008, it is enough to operate a csv file.
c.FileChoose class: A file selector for JavaFX that can open the local resource manager. Whether the UI is beautiful or not depends on your system version.
d.CsvReader class: A tool class under the javacsv-2.0.jar package, mainly used to operate csv files
e.JTable class: Create a JTable instance to make csv files After opening the display, you need to pay attention to the order of parameters. The table content is a two-dimensional array, and the header is a one-dimensional array
JTable table = new JTable(表格内容,表头);
f. Store the one-digit array into the one-dimensional array:
String[][] arr = new String[10][];//开辟一个10行的二维数组
String[] row1 = {"id","name","sex","age"};
arr[0] = row1;//存进二维数组g. JTable does not display the header: you need to put the JTable object into a Pane
JTable table = new JTable(表内容,表头); JScrollPane jScrollPane = new JScrollPane(table); SwingNode swingNode = new SwingNode(); swingNode.setContent(jScrollPane);//使用swingNode封装swing组件，就可以在Javafx中用了
new CsvReader(String filePath) initialization construction When you need to pass in a local csv file address
boolean readHeaders() read the header and skip
String[] getHeaders() Get the csv file header (very strange, you need to call the readHeaders() method before you can get it, otherwise a null pointer exception will be reported)
That's it:
CsvReader reader = new CsvReader("xxx.csv");
reader.readHeaders(); //没有这句话，执行下面会报错
String[] head = reader.getHeaders();boolean readRecord() reads a line of csv content. As long as you call it, the next time you call it, it will switch to the next line of csv. Usually we use a while loop to operate all the content line by line in time
String getRawRecord() Read a row of data
while (reader.readRecord()){
System.out.println(reader.getRawRecord());//输出一行内容
}@Override
public void start(Stage primaryStage) throws Exception {
primaryStage.setTitle("文件选择器");
primaryStage.setHeight(600);
primaryStage.setWidth(800);
final FileChooser fileChooser = new FileChooser();
//设置打开资源管理器后的文件过滤
fileChooser.getExtensionFilters().addAll(
new FileChooser.ExtensionFilter("All Images","*.*"),
new FileChooser.ExtensionFilter("PNG","*.png"),
new FileChooser.ExtensionFilter("MP4","*.mp4"),
new FileChooser.ExtensionFilter("CSV","*.csv")
);
final Button open = new Button("打开文件");
final GridPane inputGridPane = new GridPane();//创建格子布局面板
GridPane.setConstraints(open,0,0);//第0行0列
inputGridPane.setHgap(6.0);//设置水平间距
inputGridPane.setVgap(6.0);//设置垂直间距
inputGridPane.getChildren().addAll(open);//添加按钮
final Pane rootGroup = new VBox(12);//创建一个垂直盒子布局器
rootGroup.getChildren().addAll(inputGridPane);//把格子面板放进来
rootGroup.setPadding(new Insets(12,12,12,12));
primaryStage.setScene(new Scene(rootGroup));
primaryStage.show();
//设置点击-打开文件-的动作事件
open.setOnAction(event -> {
File file = fileChooser.showOpenDialog(primaryStage);//在当前窗口打开文件选择器
if (file != null){
try {
FileInputStream inputStream = new FileInputStream(file);
BufferedInputStream stream = new BufferedInputStream(inputStream);
String fileName = file.getName();
String filePath = file.getAbsolutePath();
System.out.println("文件路径 = "+filePath);
try {
CSVDemo.read(filePath);
} catch (IOException e) {
e.printStackTrace();
}
//封装JTable，使得JTable和Javafx嵌套在一起
SwingNode swingNode = new SwingNode();
try {
JTable table = read(filePath);
JScrollPane jScrollPane = new JScrollPane(table);
swingNode.setContent(jScrollPane);
} catch (IOException e) {
e.printStackTrace();
}
//设置JTable打开后表格的相对位置
GridPane.setConstraints(swingNode,0,1);
inputGridPane.getChildren().add(swingNode);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
});
}
//读取csv文件并把它读取到JTable中返回
public static JTable read(String filePath) throws IOException {
CsvReader reader = new CsvReader(filePath);
reader.readHeaders();//跳过表头
String[] head = reader.getHeaders();
List<String []> list = new ArrayList<>();
String s = reader.getRawRecord();
System.out.println("表头 "+s);
String[] r1 = dataToArray(s);
// list.add(r1);
while (reader.readRecord()) {
System.out.println(reader.getRawRecord());
list.add(dataToArray(reader.getRawRecord()));
}
String[][] data = new String[list.size()][];
System.out.println("一共"+list.size()+"行数据");
for (int i = 0; i < data.length; i++) {
data[i] = list.get(i);
}
JTable table = new JTable(data,head);
return table;
}
//将每一行的数据从String转为String数组
public static String[] dataToArray(String row){
String[] res = row.split(",");
return res;
}Effect Display
JScrollPane encapsulates JTable, SwingNode encapsulates JScrollPane
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