java System.out.println 到文本文件

System.out.println to text file

提问by Sapus Boh

I was searching a way to get System.out.printlntexts and save them on a .txt file, for example:

我正在寻找一种获取System.out.println文本并将它们保存在 .txt 文件中的方法，例如：

    System.out.println("Java vendor: " + System.getProperty("java.vendor"));
    System.out.println("Operating System architecture: " + System.getProperty("os.arch"));
    System.out.println("Java version: " + System.getProperty("java.version"));
    System.out.println("Operating System: " + System.getProperty("os.name"));
    System.out.println("Operating System Version: " + System.getProperty("os.version"));
    System.out.println("Java Directory: " + System.getProperty("java.home"));

I want a .txtfile to the output, any ideas? Thank you

我想要一个.txt文件到输出，有什么想法吗？谢谢

回答by Codebender

You can do,

你可以做，

PrintStream fileStream = new PrintStream("filename.txt");
System.setOut(fileStream);

Then any println statement will go into the file.

然后任何 println 语句都将进入文件。

回答by DimaSan

First you need to declare a String textthat contains your message you want to output:

首先，您需要声明一个String text包含要输出的消息：

String text = "Java vendor: " + System.getProperty("java.vendor");

Then you can use try-with-resourcesstatement (since JDK 7)which will automatically close your PrintWriter, when all the output done:

然后您可以使用try-with-resources语句（自 JDK 7 起）PrintWriter，当所有输出完成时，它会自动关闭您的:

try(PrintWriter out = new PrintWriter("texts.txt")  ){
    out.println(text);
}

回答by Ankit Tripathi

You are using standard System output stream which writes to console.You need to use PrintStream class,create a file and write to it.Example is below :

您正在使用写入控制台的标准系统输出流。您需要使用 PrintStream 类，创建一个文件并写入它。示例如下：

How to write console output to a txt file

如何将控制台输出写入txt文件