我正在尝试在文件中打印132_000行。
这是我的代码:
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.Random;
import java.util.Scanner;
public class CredentialTemplate {
public static void main(String[] args) throws IOException {
// Declaring output file
File fout = new File(
"D:\\testout.txt");
FileOutputStream fos = new FileOutputStream(fout);
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fos));
int start = 0, stop = 0;
Scanner x = new Scanner(System.in);
System.out.print("Start: ");
start = x.nextInt();
System.out.print("End: ");
stop = x.nextInt();
Random r = new Random();
for (int i = start; i <= stop; i++) {
System.out.println("Importeduser" + i + ",Test,4," + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9) + r.nextInt(9)+ r.nextInt(9)+",0,"
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9) + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9) + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9));
bw.write("Importeduser" + i + ",Test,4," + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9) + r.nextInt(9)+ r.nextInt(9)+",0,"
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9) + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9) + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9));
bw.newLine();
}
}
}
我面临的问题: 我没有在txt文件中获得所有1,32,000行。 有时它的1,31,693行或1,31,721行。
但在控制台中,我能够看到所有打印的1,32,000张。
如果我在这里做错了,请告诉我。
提前致谢。
答案 0 :(得分:5)
您没有关闭Writer
。您可以使用finally
块,也可以使用try-with-resources
。第一个看起来像,
try {
for (int i = start; i <= stop; i++) {
String line = "Importeduser" + i + ",Test,4," + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + ",0," + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9);
System.out.println(line);
bw.write(line);
bw.newLine();
}
} finally {
if (bw != null) {
bw.close();
}
if (fos != null) {
fos.close();
}
}
第二个(try-with-resources
)可能看起来像
try (FileOutputStream fos = new FileOutputStream(fout);
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(
fos))) {
for (int i = start; i <= stop; i++) {
String line = "Importeduser" + i + ",Test,4," + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + ",0," + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9)
+ r.nextInt(9) + r.nextInt(9) + r.nextInt(9);
System.out.println(line);
bw.write(line);
bw.newLine();
}
}
答案 1 :(得分:3)
关闭您的编写器以编写剩余数据
在程序结束时执行bw.close()