[英]Exporting a java game into an executable jar file in eclipse - not working
[英]Java - File Reading after exporting to executable jar file in eclipse
在eclipse中,當我將代碼導出到可執行jar文件時,jar無法找到任何文件。 我正在使用的代碼是
FileReader fr = new FileReader("src/pkg/Password.txt"); BufferedReader br = new BufferedReader(fr);
那就是生成FileNotFoundException
注意:此代碼在eclipse中工作正常。 有沒有辦法在不使用.getResource()
或.getResourseAsStream()
情況下正確執行此操作,因為沒有帶有URL或InputStream的FileReader的構造函數
這是我的一個類的代碼:
package pkg;
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
public class MainP extends JPanel {
/**
*
*/
private JButton btnAddCoupon, btnChangeStarCount;
private static final long serialVersionUID = 2669362135801409216L;
private JPasswordField passwordField;
static String s;
/**
* Create the panel.
*/
public MainP() {
GridBagLayout gridBagLayout = new GridBagLayout();
gridBagLayout.columnWidths = new int[] { 245, 94, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
gridBagLayout.rowHeights = new int[] { 49, 0, 0, 0, 0, 0 };
gridBagLayout.columnWeights = new double[] { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0, Double.MIN_VALUE };
gridBagLayout.rowWeights = new double[] { 0.0, 0.0, 0.0, 0.0, 0.0,
Double.MIN_VALUE };
setLayout(gridBagLayout);
JButton btnCashIn = new JButton("Cash In");
btnCashIn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
MainClass.f2.setVisible(true);
MainClass.f.setVisible(false);
}
});
GridBagConstraints gbc_btnCashIn = new GridBagConstraints();
gbc_btnCashIn.fill = GridBagConstraints.BOTH;
gbc_btnCashIn.insets = new Insets(0, 0, 5, 5);
gbc_btnCashIn.gridx = 0;
gbc_btnCashIn.gridy = 0;
add(btnCashIn, gbc_btnCashIn);
JLabel lblAdminrequiresPassword = new JLabel(
"Admin (Requires Password)");
GridBagConstraints gbc_lblAdminrequiresPassword = new GridBagConstraints();
gbc_lblAdminrequiresPassword.insets = new Insets(0, 0, 5, 0);
gbc_lblAdminrequiresPassword.gridx = 9;
gbc_lblAdminrequiresPassword.gridy = 0;
add(lblAdminrequiresPassword, gbc_lblAdminrequiresPassword);
btnAddCoupon = new JButton("Add Coupon");
btnAddCoupon.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
MainClass.f3.setVisible(true);
MainClass.f.setVisible(false);
}
});
GridBagConstraints gbc_btnAddCoupon = new GridBagConstraints();
gbc_btnAddCoupon.insets = new Insets(0, 0, 5, 0);
gbc_btnAddCoupon.gridx = 9;
gbc_btnAddCoupon.gridy = 1;
add(btnAddCoupon, gbc_btnAddCoupon);
btnChangeStarCount = new JButton("Change Star Count");
btnChangeStarCount.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
MainClass.f4.setVisible(true);
MainClass.f.setVisible(false);
}
});
GridBagConstraints gbc_btnChangeStarCount = new GridBagConstraints();
gbc_btnChangeStarCount.insets = new Insets(0, 0, 5, 0);
gbc_btnChangeStarCount.gridx = 9;
gbc_btnChangeStarCount.gridy = 2;
add(btnChangeStarCount, gbc_btnChangeStarCount);
enab(false);
passwordField = new JPasswordField();
passwordField.setForeground(Color.red);
passwordField.getDocument().addDocumentListener(new DocumentListener() {
@Override
public void removeUpdate(DocumentEvent e) {
try {
BufferedReader br = new BufferedReader(new FileReader("/pkg/Password.txt"));
s = br.readLine();
if (passwordField.getText().equals(s)) {
passwordField.setForeground(Color.green);
enab(true);
} else {
passwordField.setForeground(Color.red);
enab(false);
}
br.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
@Override
public void insertUpdate(DocumentEvent e) {
try {
BufferedReader br = new BufferedReader(new FileReader("/pkg/Password.txt"));
s = br.readLine();
if (passwordField.getText().equals(s)) {
passwordField.setForeground(Color.green);
enab(true);
} else {
passwordField.setForeground(Color.red);
enab(false);
}
br.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
@Override
public void changedUpdate(DocumentEvent e) {
// XXX Do not change XXX
}
});
GridBagConstraints gbc_passwordField = new GridBagConstraints();
gbc_passwordField.insets = new Insets(0, 0, 5, 0);
gbc_passwordField.fill = GridBagConstraints.HORIZONTAL;
gbc_passwordField.gridx = 9;
gbc_passwordField.gridy = 3;
add(passwordField, gbc_passwordField);
JLabel lblPasswordField = new JLabel("Password Field");
GridBagConstraints gbc_lblPasswordField = new GridBagConstraints();
gbc_lblPasswordField.gridx = 9;
gbc_lblPasswordField.gridy = 4;
add(lblPasswordField, gbc_lblPasswordField);
}
private void enab(boolean b) {
btnAddCoupon.setEnabled(b);
btnChangeStarCount.setEnabled(b);
}
}
注意:我嘗試使用FileReader
和InputStreamReader
MyJar.jar (C://Users/Orion31/Desktop/MyJar.jar | ---- pkg | --- Password.txt | --- StarCount.txt | --- CS.txt
不要在任何路徑中引用src
,一旦導出程序就不會存在。
所有資源都作為條目存儲在zip文件(Jar文件)中,這意味着您不能再像以前那樣使用任何文件訪問方法,而是需要使用Class#getResource
或Class#getResourcesStream
來代替
有沒有辦法在不使用.getResource()或.getResourseAsStream()的情況下正確執行此操作
不(或者至少沒有我會很樂意討論)
因為沒有帶有URL或InputStream的FileReader的構造函數
實際上,有一種方法,或者更重要的是,有一種方法,你可以使用InputStreamReader
而不是FileReader
,例如......
try (BufferedReader reader = new InputStreamReader(getClass().getResourceAsStream("/pkg/Password.txt"))) {
// Read as normal
} catch (IOException exp) {
exp.printStackTrace();
}
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