java中如何将输入输出内容写到文件中，请大家帮我改一下这段代码，实现所有IDE内容输出到文件即可求注释

package 房贷计算器;
import java.io.*;
public class MortgageCalculator {

public static void main(String[] args) {

float s=0,unit_price=0,first_payment=0,Loan_Term=0,monthly_rate=0;
float total_price=0,total_loans=0,total_repayment=0;
float interest_payable=0,monthly_payment=0,a1=0,an=0;
int i=0;
int x = 12, j = 1 , a = 0, k = 0 ;
System.out.println("请输入房屋面积：");
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
try {
s = Float.parseFloat(br.readLine());
System.out.println("请输入房屋单价（单位：元/平方米）：");
unit_price = Float.parseFloat(br.readLine());
System.out.println("请输入首付款 : ");
first_payment = Float.parseFloat(br.readLine());
System.out.println("请输入贷款年数 : ");
Loan_Term = Float.parseFloat(br.readLine());
System.out.println("请输入年息 : ");
monthly_rate = Float.parseFloat(br.readLine());
monthly_rate=monthly_rate/x;
}
catch (NumberFormatException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

total_price = s * unit_price;
total_loans = total_price - first_payment;
System.out.println("请选择还贷方式 : ");
System.out.println("输入1代表等额本金还款法 : ");
System.out.println("输入2代表等额本息还款法 : ");
try {
i = (int) Float.parseFloat(br.readLine());
} catch (NumberFormatException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();

}
System.out.println(i);
就是要这里显示的内容全部输入到文件放不下代码了，比较郁闷，私信我，我给爷发代码

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推荐答案 2014-02-11

package te;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.Scanner;

public class a {
    public static void main(String[] args) throws IOException {
        String message = "请输入信息";
        System.out.println(message);
        Scanner sc = new Scanner(System.in);
        String message_scanner = "没有有姓名";
        //接收整行的输入
        message_scanner = sc.nextLine();
        //输出文件
        String filepath = "d:"+File.separator+"info.txt";
        File f = new File(filepath);
        if(!f.exists()){
            f.createNewFile();
        }
        FileOutputStream fos = new FileOutputStream(f);
        OutputStreamWriter osw = new OutputStreamWriter(fos);
        BufferedWriter bw = new BufferedWriter(osw);
        //写数据进入文件
        bw.write(message);
        bw.write("\r\n");
        bw.write(message_scanner);
        //关闭
        bw.flush();
        bw.close();
        osw.close();
        fos.close();
    }
}

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第1个回答 2014-02-11