一个计数器的javabeen！
type Status report
message count.txt (No such file or directory)
description The requested resource (count.txt (No such file or directory)) is not available.
------
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//counter.java
package counter;
import java.io.*;
public class counter extends Object
{
public String path="";
public String doCount() throws FileNotFoundException
{
BufferedReader File;
String countFile =path;
File =new BufferedReader(new FileReader(countFile));
String readStr ="";
int writeStr =1;
try
{
readStr =File.readLine();
}
catch(IOException e)
{
System.out.println("读取数据错误.");
}
if(readStr ==""){readStr="没有任何记录";}
else
{
writeStr=Integer.parseInt(readStr)+1;
}
try
{
PrintWriter pw = new PrintWriter(new FileOutputStream(countFile));
pw.println(writeStr);
pw.close();
}
catch(IOException e)
{
System.out.println(e.getMessage());
}
return readStr;
}
}
------
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<jsp:useBean id="counter" scope="request" class="counter.counter"/>
<%@page contentType="text/html;charset=gb2312"%>
<%
counter.path="count.txt";
String count=counter.doCount();
%>
<%=count%>
//////////////////////////////////////////////////////
它的提示说找不到counter.txt文件，不知如何解决！？求助！！
------
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其实，刚刚有这个可运行的环境，还真不知道如何去学习javaBeen!
请hofman指条明路！
Thank you!
------
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主要是缺少文件路径，已经替你搞定了。
改正后的文件是beanTest.jsp.
文件的读写应该用绝对路径，例如/home/sunchj/public_html/counter/count.txt,
而不能用相对路径，如count.txt。
------
message count.txt (No such file or directory)
description The requested resource (count.txt (No such file or directory)) is not available.
------
回复此文章 |
//counter.java
package counter;
import java.io.*;
public class counter extends Object
{
public String path="";
public String doCount() throws FileNotFoundException
{
BufferedReader File;
String countFile =path;
File =new BufferedReader(new FileReader(countFile));
String readStr ="";
int writeStr =1;
try
{
readStr =File.readLine();
}
catch(IOException e)
{
System.out.println("读取数据错误.");
}
if(readStr ==""){readStr="没有任何记录";}
else
{
writeStr=Integer.parseInt(readStr)+1;
}
try
{
PrintWriter pw = new PrintWriter(new FileOutputStream(countFile));
pw.println(writeStr);
pw.close();
}
catch(IOException e)
{
System.out.println(e.getMessage());
}
return readStr;
}
}
------
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<jsp:useBean id="counter" scope="request" class="counter.counter"/>
<%@page contentType="text/html;charset=gb2312"%>
<%
counter.path="count.txt";
String count=counter.doCount();
%>
<%=count%>
//////////////////////////////////////////////////////
它的提示说找不到counter.txt文件，不知如何解决！？求助！！
------
回复此文章 |
其实，刚刚有这个可运行的环境，还真不知道如何去学习javaBeen!
请hofman指条明路！
Thank you!
------
回复此文章 |
主要是缺少文件路径，已经替你搞定了。
改正后的文件是beanTest.jsp.
文件的读写应该用绝对路径，例如/home/sunchj/public_html/counter/count.txt,
而不能用相对路径，如count.txt。
------
hofman
2005-11-19 22:13:21
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