BufferReader無法讀取Java中的完整文件
[英]BufferReader not able to read full file in java
問題描述
您好朋友，我有以下數據存儲在文件中。
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head></head>
<body>
<div id="divOldReceipt" style="width:100%">
<style>
.tableStyle{border-collapse: collapse;
width: 100%;
font-family: Times New Roman;
font-size: 17px;
border: 1px solid black;}
.tableStyle th td {border: 1px solid black;}
.tableStyle td {border: 1px solid black;padding-left:3px;}
</style>
<table cellspacing="0" cellpadding="0" style="width: 8in; font-family:Times New Roman;">
<tbody>
<tr>
<td style="width: 20%;text-align:center" rowspan="2">
<img style="height: 84px; width: 71px" src={%images_path%}></img>
</td>
<td style="width: 60%;text-align: center; font-size: 25px;">
<b>
CORPORATION OF CHENNAI
</b>
</td>
<td></td>
</tr>
<tr>
<td style="text-align: center; font-size: 18px">
<b>
PROPERTY TAX RECEIPT
</b>
</td>
<td></td>
</tr>
<tr>
<td colspan="3">
<table class="tableStyle" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td style="width: 20%"></td>
<td style="width: 20%"></td>
<td style="width: 10%"></td>
<td style="width: 10%"></td>
<td style="width: 40%"></td>
</tr>
<tr>
<td style="height: 25px;">
<b>
Receipt No:
</b>
</td>
<td colspan="2" style="height: 25px;">
<b>
{%receiptNo%}
</b>
</td>
<td colspan="2" style="text-align:center;height: 25px;">
<b>
Receipt Date: {%Receipt_date%}
</b>
</td>
</tr>
<tr>
<td style="height: 25px;">
<b>
Name:
</b>
</td>
<td style="height: 25px;" colspan="4">
{%persone_name%}
</td>
</tr>
<tr>
<td style="height: 25px;">
<b>
Address:
</b>
</td>
<td style="height: 25px;" colspan="4">
{%address%}
</td>
</tr>
<tr>
<td rowspan="2" style="height: 25px;">
<b>
Payment Details:
</b>
</td>
<td style="height: 25px;border-right-style:none;">
Description:
</td>
<td colspan="3" style="height: 25px;border-left-style:none;">
New Property Tax Number : {%new_property_tax_no%}
<br>
Old Property Tax Number : {%old_property_tax_no%}
</td>
</tr>
<tr>
<td style="height: 25px;border-right-style:none;">
Paid By:
</td>
<td colspan="3" style="height: 25px;border-left-style:none;">
{%paid_by%}
</td>
</tr>
<tr>
<td style="text-align:center;height: 25px;" colspan="3">
<b>
Description Head of A/C
</b>
</td>
<td style="text-align:center;height: 25px;" colspan="2">
<b>
Amount (in Rupees)
</b>
</td>
</tr>
<tr>
<td style="height: 25px;text-align: center;" colspan="3">
{%installment%}
</td>
<td style="text-align:center;padding-right:5px;height : 25px;" colspan="2">
{%adjistment%}
</td>
</tr>
<tr>
<td style="text-align:right;padding-right:5px;height: 25px;" colspan="3">
<b>
Total:
</b>
</td>
<td style="text-align:center;padding-right:5px;height : 25px;" colspan="2">
<b>
{%adjistment%}
</b>
</td>
</tr>
{%Bank Details%}
<tr>
<td colspan="5" style="height: 25px;">
This is computer generated receipt. Signature is not neccessary.Except Online payment the receipt is subject to realisation of cheque.
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</body>
我想使用以下代碼在Java中讀取此文件
public String readTemplateFile(String fileName) throws Exception
{
BufferedReader bufferedReader = new BufferedReader(new FileReader(fileName));
String line =null;
StringBuilder sb = new StringBuilder();
while((line = bufferedReader.readLine())!=null)
{
sb.append(line);
}
return sb.toString();
}
要么
public String readFile(String filepath) throws IOException {
File f = new File(filepath);
if (f.exists()) {
FileInputStream in = new FileInputStream(f);
int size = in.available();
byte c[] = new byte[size];
for (int i = 0; i < size; i++) {
c[i] = (byte) in.read();
}
String filedata = new String(c, "utf-8");
return filedata.toString().trim();
} else {
return null;
}
}
但是輸出以下未讀取完整文件
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head></head> <body> <div id="divOldReceipt" style="width:100%"> <style> .tableStyle{border-collapse: collapse; width: 100%; font-family: Times New Roman; font-size: 17px; border: 1px solid black;} .tableStyle th td {border: 1px solid black;} .tableStyle td {border: 1px solid black;padding-left:3px;} </style> <table cellspacing="0" cellpadding="0" style="width: 8in; font-family:Times New Roman;"> <tbody> <tr> <td style="width: 20%;text-align:center" rowspan="2"> <img style="height: 84px; width: 71px" src="../Images/Corporation.gif"></img> </td> <td style="width: 60%;text-align: center; font-size: 25px;"> <b> CORPORATION OF CHENNAI </b> </td> <td></td> </tr> <tr> <td style="text-align: center; font-size: 18px"> <b> PROPERTY TAX RECEIPT </b> </td> <td></td> </tr> <tr> <td colspan="3"> <table class="tableStyle" cellspacing="0" cellpadding="0"> <tbody> <tr> <td style="width: 20%"></td> <td style="width: 20%"></td> <td style="width: 10%"></td> <td style="width: 10%"></td> <td style="width: 40%"></td> </tr> <tr> <td style="height: 25px;"> <b> Receipt No: </b> </td> <td colspan="2" style="height: 25px;"> <b> {%receiptNo%} </b> </td> <td colspan="2" style="text-align:center;height: 25px;"> <b> Receipt Date: {%Receipt_date%} </b> </td> </tr> <tr> <td style="height: 25px;"> <b> Name: </b> </td> <td style="height: 25px;" colspan="4"> {%persone_name%} </td> </tr> <tr> <td style="height: 25px;">
我感到困惑，為什么我的代碼會如此運行，但有人可以幫助我解決此問題。
提前致謝
1 個解決方案
解決方案1
-2 2015-04-04 07:07:31
您提到的輸出是由第一個還是第二個代碼樣本生成的？
對於您的第一個代碼示例，請注意bufferedReader.readLine()返回文件的下一行，但放棄行尾字符。 sb.append(line)方法調用不會再次添加這些行尾字符。 這可能解釋了為什么從文件中刪除了行尾。
對於您的第二個代碼in.available() ， in.available()僅返回流中剩余字節數的估計值 ，因此請勿用於確定輸入的大小。 最好順序讀取流，直到到達文件末尾。 如果到達文件末尾，則in.read()將返回-1。
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