在Java中,我有一个名为“text”的字符串变量中的文本字段中的文本。
如何将“文本”变量的内容保存到文件中?
在Java中,我有一个名为“text”的字符串变量中的文本字段中的文本。
如何将“文本”变量的内容保存到文件中?
当前回答
如果您需要基于一个字符串创建文本文件:
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
public class StringWriteSample {
public static void main(String[] args) {
String text = "This is text to be saved in file";
try {
Files.write(Paths.get("my-file.txt"), text.getBytes());
} catch (IOException e) {
e.printStackTrace();
}
}
}
其他回答
我倾向于尽可能依赖于库来进行这种操作。这使我不太可能意外地忽略一个重要的步骤(如上面狼鹬犯的错误)。上面建议了一些库,但我最喜欢的是GoogleGuava。Guava有一个名为Files的类,非常适合此任务:
// This is where the file goes.
File destination = new File("file.txt");
// This line isn't needed, but is really useful
// if you're a beginner and don't know where your file is going to end up.
System.out.println(destination.getAbsolutePath());
try {
Files.write(text, destination, Charset.forName("UTF-8"));
} catch (IOException e) {
// Useful error handling here
}
使用org.apache.mons.io.FileUtils:
FileUtils.writeStringToFile(new File("log.txt"), "my string", Charset.defaultCharset());
你可以这样做:
import java.io.*;
import java.util.*;
class WriteText
{
public static void main(String[] args)
{
try {
String text = "Your sample content to save in a text file.";
BufferedWriter out = new BufferedWriter(new FileWriter("sample.txt"));
out.write(text);
out.close();
}
catch (IOException e)
{
System.out.println("Exception ");
}
return ;
}
};
如果希望将字符串中的回车字符保留在文件中下面是一个代码示例:
jLabel1 = new JLabel("Enter SQL Statements or SQL Commands:");
orderButton = new JButton("Execute");
textArea = new JTextArea();
...
// String captured from JTextArea()
orderButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
// When Execute button is pressed
String tempQuery = textArea.getText();
tempQuery = tempQuery.replaceAll("\n", "\r\n");
try (PrintStream out = new PrintStream(new FileOutputStream("C:/Temp/tempQuery.sql"))) {
out.print(tempQuery);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(tempQuery);
}
});
使用Apache Commons IO api。它很简单
使用API作为
FileUtils.writeStringToFile(new File("FileNameToWrite.txt"), "stringToWrite");
Maven依赖项
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>