无法写入文件 [英] cannot write in the file
本文介绍了无法写入文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
大家好,我正在创建一个程序,该程序会将数据写入文本文件.数据来自数组列表,它是从数组列表中解析出的数据,例如:
good day guys, im creating a program that will write the data to a text file. the data is coming from an array list, it is a data that is solved from the array list e.g :
public double getGincome(){
gincome=rpd*dwork;
return gincome;
}
问题是我无法写入txt文件.这是我编写数据的代码:
the problem is i cannot write to my txt file..here is my code in writing the data:
public static boolean payrollWriteToFile(String filename) {
boolean saved = false;
PrintWriter pw = null; // pw is a PrintWriter identifier
try {
// instantiate pw as PrintWriter, FileWriter
pw = new PrintWriter(new FileWriter(filename));
try {
// for each loop. each data from payrolls is
written to parameter
for (Person payroll : payrolls) {
pw.println(payroll.getName());
pw.println(payroll.getGincome());
pw.println(payroll.getSss());
pw.println(payroll.getPagibig());
pw.println(payroll.getPhil());
pw.println(payroll.getDeduc());
pw.println(payroll.getNincome());
}
saved = true;
} finally {
pw.close();
}
} catch (IOException e) {
e.printStackTrace();
}
return saved;
}
这是我的数组
public class Person {
private String name;
private String add;
private String gender;
private String status;
public double rpd;
public double dwork;
public static int EmployeeCount;
public double gincome;
public double nincome;
public double deduc;
public double sss;
public double pagibig;
public double phil;
public Person(double gincome, double nincome, double deduc, double sss, double
pagibig, double phil ) {
this.gincome = gincome ;
this.nincome = nincome;
this.deduc = deduc;
this.sss = sss;
this.pagibig= pagibig;
this.phil = phil;
}
Person( String name , double gincome, double sss, double pagibig, double phil,
double deduc, double nincome){
this.gincome = gincome;
this.nincome = nincome;
this.sss = sss;
this.pagibig = pagibig;
this.phil = phil;
this.deduc = deduc;
}
Person(String name, String add, String gender, String status, double dwork, double rpd)
{
this.name = name;
this.add = add;
this.gender = gender;
this.status = status;
this.rpd = rpd;
this.dwork = dwork;
}
public double getGincome(){
gincome=rpd*dwork;
return gincome;
}
public double getDeduc(){
double sss = gincome *.03 ;
double pagibig = gincome *.02;
double philhealth = gincome* .0125 ;
deduc= sss + pagibig +philhealth;
return deduc;
}
public double getNincome(){
return nincome;
}
public double getSss(){
return sss = getGincome() * .03;
}
public double getPagibig(){
return pagibig = getGincome() * .02;
}
public double getPhil(){
return phil = getGincome() * .0125;
}
public static int getEmployeeCount(){
return EmployeeCount;
}
public String getName() {
return name;
}
public String getAdd() {
return add;
}
public String getGender() {
return gender;
}
public String getStatus() {
return status;
}
public double getRpd(){
return rpd;
}
public double getDwork(){
return dwork;
}
public void setName(String name) {
this.name = name;
}
public void setAdd(String add) {
this.add = add;
}
public void setGender(String gender) {
this.gender = gender;
}
public void setStatus(String status) {
this.status = status;
}
public void setRpd(double rpd){
this.rpd = rpd;
}
public void setdWork(double dwork){
this.dwork = dwork;
}
}
我希望你能帮助我.
推荐答案
如果允许的话,请改用BufferedWriter
(也许您不是出于家庭作业或其他原因).
Use a BufferedWriter
instead, if you are allowed to (maybe you aren't for homework purposes or some other reason).
File file = new File(filename);
if (!file.exists())
{
try
{
file.createNewFile();
} catch (Exception e)
{
e.printStackTrace();
}
}
try
{
// Read to end of file for writing
BufferedReader read = new BufferedReader(new FileReader(file));
String complete = "";
String line = null;
while ((line = read.readLine()) != null)
{
complete += line + "\n";
}
// Write your data
BufferedWriter write = new BufferedWriter(new FileWriter(file));
for (Person payroll : payrolls)
{
write.append(payroll.getName());
write.append(Double.toString(payroll.getGincome()));
write.append(Double.toString(payroll.getSss()));
write.append(Double.toString(payroll.getPagibig()));
write.append(Double.toString(payroll.getPhil()));
write.append(Double.toString(payroll.getDeduc()));
write.append(Double.toString(payroll.getNincome()));
}
read.close();
write.close();
} catch (Exception e)
{
e.printStackTrace();
}
如果您正确地使用了for
循环和所有的getter方法,这应该可以工作.
This should work if your for
loop and all your getter methods are properly used.
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