您所在位置：主题：[讨论]又一个程序问题??很奇怪!!进来看看
lvjun106
[专家分：230] 发布于 2006-10-12 21:34:00
<%@ page contentType="text/htmlcharset=GBK" %>
<%@ page import="java.io.*" %>
<%@ page import="java.util.*" %>
<%! //对字符串进行压流处理的方法
public String getString(String content){
try{
StringReader in=new StringReader(content);
PushbackReader push=new PushbackReader(in);
StringBuffer stringbuffer=new StringBuffer();
int c;
char b[]=new char[1];
while((c=push.read(b,0,1))!=-1){
String s=new String(b);
if(s.equals("<")){
push.unread('&');
push.read(b,0,1);
stringbuffer.append(new String(b));
push.unread('L');
push.read(b,0,1);
stringbuffer.append(new String(b));
push.unread('T');
push.read(b,0,1);
stringbuffer.append(new String(b));
}else if(s.equals(">")){
push.unread('&');
push.read(b,0,1);
stringbuffer.append(new String(b));
push.unread('G');
push.read(b,0,1);
stringbuffer.append(new String(b));
push.unread('T');
push.read(b,0,1);
stringbuffer.append(new String(b));
}else if(s.equals("/n")){
stringbuffer.append("<BR>");
}else{
stringbuffer.append(s);
}
}
push.close();
in.close();
return new String(stringbuffer); //返回处理后的字符串
}catch(IOException e1){
return new String("不能读取内容");
}
}
%>
<%
File file=null;
FileReader in=null;
BufferedReader buffer=null;
if(session.isNew()){
file=new File("C:/Tomcat 5.0/work/Catalina/localhost/MyJsp/org/apache/jsp","A.txt");
in=new FileReader(file);
buffer=new BufferedReader(in);
session.setAttribute("file",file);
session.setAttribute("FileReader",in);
session.setAttribute("BufferedReader",buffer);
}
String s=request.getParameter("reRead");
if(s==null){
s="";
}
if(s.equals("重新读取文件")){
file=new File("C:/Tomcat 5.0/work/Catalina/localhost/MyJsp/org/apache/jsp","A.txt");
in=new FileReader(file);
buffer=new BufferedReader(in);
session.setAttribute("file",file);
session.setAttribute("FileReader",in);
session.setAttribute("BufferedReader",buffer);
}
try{
String str=null;
int i=1;
file=(File)session.getAttribute("file");
in=(FileReader)session.getAttribute("FileReader");
buffer=(BufferedReader)session.getAttribute("BufferedReader");
while((str=buffer.readLine())!=null&&i<=5){
str=getString(str);
out.print("<BR>"+str);
i++;
}
}catch(IOException e){
out.print("该文件不存在");
}
%>
<html>
<body>
<p>单击按钮读取下五行:</p>
<form action="ReadFileByLine.jsp" method="post" name="form">
<input type="submit" name="next5" value="读取文件的下五行">
</form>
<form action="ReadFileByLine.jsp" method="post" name="form1">
<input type="submit" name="reRead" value="重新读取文件">
</form>
</body>
</html>
在IE中打开后弹出文件下载的对话框(询问是否打开或保存文件)当点击找开后,程序被默认的(Jcreator)打开!,不语~~~~~~~~~~~程序是按书上打的!
<%@ page import="java.io.*" %>
<%@ page import="java.util.*" %>
<%! //对字符串进行压流处理的方法
public String getString(String content){
try{
StringReader in=new StringReader(content);
PushbackReader push=new PushbackReader(in);
StringBuffer stringbuffer=new StringBuffer();
int c;
char b[]=new char[1];
while((c=push.read(b,0,1))!=-1){
String s=new String(b);
if(s.equals("<")){
push.unread('&');
push.read(b,0,1);
stringbuffer.append(new String(b));
push.unread('L');
push.read(b,0,1);
stringbuffer.append(new String(b));
push.unread('T');
push.read(b,0,1);
stringbuffer.append(new String(b));
}else if(s.equals(">")){
push.unread('&');
push.read(b,0,1);
stringbuffer.append(new String(b));
push.unread('G');
push.read(b,0,1);
stringbuffer.append(new String(b));
push.unread('T');
push.read(b,0,1);
stringbuffer.append(new String(b));
}else if(s.equals("/n")){
stringbuffer.append("<BR>");
}else{
stringbuffer.append(s);
}
}
push.close();
in.close();
return new String(stringbuffer); //返回处理后的字符串
}catch(IOException e1){
return new String("不能读取内容");
}
}
%>
<%
File file=null;
FileReader in=null;
BufferedReader buffer=null;
if(session.isNew()){
file=new File("C:/Tomcat 5.0/work/Catalina/localhost/MyJsp/org/apache/jsp","A.txt");
in=new FileReader(file);
buffer=new BufferedReader(in);
session.setAttribute("file",file);
session.setAttribute("FileReader",in);
session.setAttribute("BufferedReader",buffer);
}
String s=request.getParameter("reRead");
if(s==null){
s="";
}
if(s.equals("重新读取文件")){
file=new File("C:/Tomcat 5.0/work/Catalina/localhost/MyJsp/org/apache/jsp","A.txt");
in=new FileReader(file);
buffer=new BufferedReader(in);
session.setAttribute("file",file);
session.setAttribute("FileReader",in);
session.setAttribute("BufferedReader",buffer);
}
try{
String str=null;
int i=1;
file=(File)session.getAttribute("file");
in=(FileReader)session.getAttribute("FileReader");
buffer=(BufferedReader)session.getAttribute("BufferedReader");
while((str=buffer.readLine())!=null&&i<=5){
str=getString(str);
out.print("<BR>"+str);
i++;
}
}catch(IOException e){
out.print("该文件不存在");
}
%>
<html>
<body>
<p>单击按钮读取下五行:</p>
<form action="ReadFileByLine.jsp" method="post" name="form">
<input type="submit" name="next5" value="读取文件的下五行">
</form>
<form action="ReadFileByLine.jsp" method="post" name="form1">
<input type="submit" name="reRead" value="重新读取文件">
</form>
</body>
</html>
在IE中打开后弹出文件下载的对话框(询问是否打开或保存文件)当点击找开后,程序被默认的(Jcreator)打开!,不语~~~~~~~~~~~程序是按书上打的!
