[英]How to read, write content to text file using FileWriter and BufferedWriter in Java
[英]How to write content on a text file using java?
我在 java.which system.out 中有一個程序,一些字符串,我需要將它們中的每一個保存在一個文本文件中
它以一種格式顯示
ruo1 行 2 行 3
我想要它
第 1 行
第 2 行
第 3 行
我怎么能在java中做到這一點?
import java.util.Arrays; import java.io.*; public class BruteForce { public static FileOutputStream Output; public static PrintStream file; public static String line; public static void main(String[] args) { String password = "javabeanc"; char[] charset = "abcdefghijklmnopqrstuvwxyz".toCharArray(); BruteForce bf = new BruteForce(charset, 8); String attempt = bf.toString(); while (true) { FileWriter writer; try { writer = new FileWriter("test.txt"); writer.write(attempt+"\n"); writer.close(); } catch (IOException e) { e.printStackTrace(); } attempt = bf.toString(); System.out.println("Tried: " + attempt); bf.increment(); } } private char[] cs; // Character Set private char[] cg; // Current Guess public BruteForce(char[] characterSet, int guessLength) { cs = characterSet; cg = new char[guessLength]; Arrays.fill(cg, cs[0]); } public void increment() { int index = cg.length - 1; while(index >= 0) { if (cg[index] == cs[cs.length-1]) { if (index == 0) { cg = new char[cg.length+1]; Arrays.fill(cg, cs[0]); break; } else { cg[index] = cs[0]; index--; } } else { cg[index] = cs[Arrays.binarySearch(cs, cg[index]) + 1]; break; } } } public String toString() { return String.valueOf(cg); } }
非常快速的代碼。 如果有編譯錯誤,我深表歉意。
import java.io.FileWriter;
import java.io.IOException;
public class TestClass {
public static String newLine = System.getProperty("line.separator");
public static void main(String[] a) {
FileWriter writer;
try {
writer = new FileWriter("test.txt");
for(int i=0;i<3;i++){
writer.write(row+i+newLine);
}
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
給每一行添加一個換行符“\n”怎么樣?
你可以使用 PrintWriter pw;
上面的 pw.println(row+i) 而不是硬編碼 newLine
使用 JDK 11 可以編寫:
public void writeToFile() {
String content = "Line 1\nLine 2";
Path path = Paths.get("./resources/sample-new.txt");
Files.writeString(path, content);
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.