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這里用到了兩個文件，一個jsp文件一個Javabean文件，通過jsp中調(diào)用Javabean可以輕松讀取文本文件，注意請放置一個文本文件afile.txt到web根目錄的test目錄下，Javabean文件編譯后將class文件放到對應(yīng)的class目錄下(tomcat環(huán)境)。
Read.jsp
<html>
<head>
<title>讀取一個文件</title>
</head>
<body bgcolor="#000000">
<%--調(diào)用Javabean --%>
<jsp:useBean id="reader" class="DelimitedDataFile" scope="request">
<jsp:setProperty name="reader" property="path" value="/test/afile.txt" />
</jsp:useBean>
<h3>文件內(nèi)容:</h3>
<p>
<% int count = 0; %>
<% while (reader.nextRecord() != -1) { %>
<% count++; %>
<b>第<% out.print(count); %>行:</b>
<% out.print(reader.returnRecord()); %><br>
<% } %>
</p>
</body>
</html>
//DelimitedDataFile.Java bean文件源代碼
//導(dǎo)入Java包
import Java.io.*;
import Java.util.StringTokenizer;
public class DelimitedDataFile
{
private String currentRecord = null;
private BufferedReader file;
private String path;
private StringTokenizer token;
//創(chuàng)建文件對象
public DelimitedDataFile()
{
file = new BufferedReader(new InputStreamReader(System.in),1);
}
public DelimitedDataFile(String filePath) throws FileNotFoundException
{
path = filePath;
file = new BufferedReader(new FileReader(path));
}
//設(shè)置文件路徑
public void setPath(String filePath)
{
path = filePath;
try {
file = new BufferedReader(new
FileReader(path));
} catch (FileNotFoundException e) {
System.out.println("file not found");
}
}
//得到文件路徑
public String getPath() {
return path;
}
//關(guān)閉文件
public void fileClose() throws IOException
{
file.close();
}
//讀取下一行記錄，若沒有則返回-1
public int nextRecord()
{
int returnInt = -1;
try
{
currentRecord = file.readLine();
}
catch (IOException e)
{
System.out.println("readLine problem, terminating.");
}
if (currentRecord == null)
returnInt = -1;
else
{
token = new StringTokenizer(currentRecord);
returnInt = token.countTokens();
}
return returnInt;
}
//以字符串的形式返回整個記錄
public String returnRecord()
{
return currentRecord;
}
}
jsp技術(shù)：jsp文件操作之讀取篇，轉(zhuǎn)載需保留來源！
鄭重聲明：本文版權(quán)歸原作者所有，轉(zhuǎn)載文章僅為傳播更多信息之目的，如作者信息標(biāo)記有誤，請第一時間聯(lián)系我們修改或刪除，多謝。
