[英]Reading and Writing TXT Files in Java
我知道这可能是入门级的东西,但我需要一些帮助。 我正在为一个班级工作,我已经用完了我的班级资源,所以我需要一些帮助
另外我正在使用 Eclipse,它没有显示任何错误
我有一个已写入 txt 文件的数组。 我在阅读时遇到问题。 基本上程序强迫客户订购三遍,作者写了三遍,完全符合它应该的,但我不知道如何让读者阅读它三遍,它只是阅读第一遍。
public static void writeOrderHeader(String name, String returning) throws Exception
{
File file;
file = new File("order.txt");
PrintWriter pw = new PrintWriter(file);
pw.println(name);
pw.println(returning);
pw.close();
}
public static void writeOrderFile(String product, String size, String type, int qty, double total) throws Exception
{
String file = "order.txt";
PrintWriter pw = new PrintWriter(new FileWriter(file, true));
pw.println(product);
pw.println(type);
pw.println(size);
pw.println(qty);
pw.println(total);
pw.close();
}
public static void confirmation() throws IOException
{
File file;
BufferedReader bf = null;
String name, returning, product, type, size, qty, total;
int intQty;
double dblTotal;
file = new File("order.txt");
FileReader fr = new FileReader(file);
bf = new BufferedReader(fr);
name = bf.readLine();
returning = bf.readLine();
product = bf.readLine();
size = bf.readLine();
type = bf.readLine();
qty = bf.readLine();
total = bf.readLine();
fr.close();
intQty = Integer.parseInt(qty);
dblTotal = Double.parseDouble(total);
String nameOutputMsg = "Welcome " + name + ".\n";
String returnOutputMsg = "Your returning customer status is " + returning + ".\n";
String productOutputMsg = "Your first choice to buy a/n size " + type + " " + size + " " + product + " with the quantity of " + intQty + ".\n";
String totalOutputMsg = "Your first Order total is $" + String.format("%.2f", dblTotal) + ".\n";
String goodbyeOutputMsg = "Thanks for ordering at ThinkGeek!";
String outputMsg = nameOutputMsg + returnOutputMsg + productOutputMsg + totalOutputMsg + goodbyeOutputMsg;
JOptionPane.showMessageDialog(null, outputMsg);
}
// 读
File f = new File(Address);
FileReader r = new FileReader(f);
BufferedReader b = new BufferedReader(r);
String out = "";
String k="";
while( (out=b.readLine()) != null) {
k+=out;
}
b.close();
//所以字符串k是答案
//写作 :
File file = new File(Address);
FileWriter fw = new FileWriter(file, true);
BufferedWriter bw = new BufferedWriter(fw);
bw.write(YourString);
bw.close();
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