java我需要帮助程序以特定格式输出文本文件。
这是我到目前为止的节目。它需要输出到一个特定格式的文本文件,但我有麻烦,请帮助。它不会向测试文件输出任何内容
import java.util.*;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.nio.charset.Charset;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
public class InputStream
{
public static void main(String[] args){
FileInputStream filestream;
BufferedReader reader;
FileOutputStream output;
PrintWriter writer;
String firstline;
String body = "";
String line;
try{
filestream = new FileInputStream("salary.txt");
reader = new BufferedReader(new InputStreamReader(filestream));
output = new FileOutputStream("test.txt");
PrintWriter writer1 = new PrintWriter("test.txt");
firstline = reader.readLine();
String result = firstline + body;
writer1.write(result);
reader.close();
reader = null;
filestream = null;
}
catch(IOException e)
{
System.out.println(e);
}
}
}
我很难让这个输出正确,但这是它应该如何看
Example Input file
Ralph Kramden associate 70817.75
Jon T. Doe assistant 79174.73
Ed Norton associate 69619.0
Tom Foolery full 116992.43
Sample Output file
Doe, Jon T. assistant 79174.73
-------
Total Salary: $79174.73
Average Salary: $79174.73
Kramden, Ralph associate 70817.75
Norton, Ed associate 69619.0
-------
Total Salary: $140436.75
Average Salary: $79174.73
# 1 楼答案
首先,在处理文件时,请始终在写入文件后关闭文件以进行保存。 你关闭了“读者”,但没有关闭“作者”
下面是一个输出您所需内容的示例:
输出: