＜html＞
＜head＞
＜title＞读取一个文件＜/title＞
＜/head＞
＜body bgcolor="#000000"＞
＜%--调用Javabean --%＞
＜jsp:useBean id="reader" class="DelimitedDataFile" scope="request"＞
＜jsp:setProperty name="reader" property="path" value="/test/afile.txt" /＞
＜/jsp:useBean＞
＜h3＞文件内容:＜/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
import Java.io.*;
import Java.util.StringTokenizer;
public class DelimitedDataFile
{
private String currentRecord = null;
private BufferedReader file;
private String path;
private StringTokenizer token;
//创建文件对象
public DelimitedDataFile()
{
file = new BufferedReader(new InputStreamReader(System.in),1);
}
public DelimitedDataFile(String filePath) throws FileNotFoundException
{
path = filePath;
file = new BufferedReader(new FileReader(path));
}
//设置文件路径
public void setPath(String filePath)
{
path = filePath;
try {
file = new BufferedReader(new FileReader(path));
} catch (FileNotFoundException e) {
System.out.println("file not found");
}
}
//得到文件路径
public String getPath()
{
return path;
}
//关闭文件
public void fileClose() throws IOException
{
file.close();
}
//读取下一行记录，若没有则返回-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个记录
public String returnRecord()
{
return currentRecord;
}
} |