如何将printStackTrace()中的异常写入Java中的文本文件？

Question

我需要在Java中的文本文件中捕获异常.例如:

try {
  File f = new File("");
}
catch(FileNotFoundException f) {
  f.printStackTrace();  // instead of printing into console it should write into a text file    
  writePrintStackTrace(f.getMessage()); // this is my own method where I store f.getMessage() into a text file.
}

使用getMessage()作品,但它只显示错误消息.我想要printStackTrace()包含行号的所有信息.

Answer 1

它接受PrintStream一个参数; 看文档.

File file = new File("test.log");
PrintStream ps = new PrintStream(file);
try {
    // something
} catch (Exception ex) {
    ex.printStackTrace(ps);
}
ps.close();

另请参见printStackTrace()和toString()之间的区别

Answer 2

尝试扩展这个简单的例子:

catch (Exception e) {

    PrintWriter pw = new PrintWriter(new File("file.txt"));
    e.printStackTrace(pw);
    pw.close();
}

如你所见,printStackTrace()有重载.