[有些时候，会报错，错误提示为： Can not find the tag library descriptor for http://java.sun.com/jsp/jstl/core 解决此问题的方法为以下： 在WEB-INF/lib里加入 jstl.

JAVA读写指定文件内容,工作中用到的,放在这里给大家分享一下.

以下为读写文件类:

package com.hexun.wap.zgpack;

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;[1。js变量获取jsp页面中java代码的变量值。 方法：var JS变量名 =   2。java代码获取js变量的值。 说明：在JSP中；Java部分是在服务器端执行的；js部分是

/**

*

* @author Administrator

*/

public class BasicFile

{

public void WriteFile(String path,String content) // 写文件类,参数: 文件路径,写入内容

{

try

{

FileWriter fw = new FileWriter(path,true);

fw.write("/n"+content);

fw.flush();

fw.close();

}

catch(IOException e)

{

e.printStackTrace();

}

}

public ArrayList ReadFile(String path) // 读文件 参数: 文件路径.

{

ArrayList list = new ArrayList();

try

{

String file = path;

BufferedReader br = new BufferedReader(new FileReader(file));

String str = "";

String free = "";

while((str = br.readLine()) != null)

{

list.add(str); //将文件放入 list ,以便JSP页面调用

}

br.close();

}

catch(Exception e)

{

e.printStackTrace();

}

return list;

}

}

以下为JSP内容:

Basic News Page

Title

Time / Author

Content

String t = request.getParameter("t")!=null?request.getParameter("t"):"";

String s = request.getParameter("s")!=null?request.getParameter("s"):"";

String d = request.getParameter("detail")!=null?request.getParameter("detail"):"";

String flag = request.getParameter("flag")!=null?request.getParameter("flag"):"false";

if(flag.equals("true"))

{

/*

byte[] b = t.getBytes("ISO8859_1");

String str = new String(b,"GBK");

byte[] b2 = s.getBytes("ISO8859_1");

String str2 = new String(b2,"GBK");

byte[] b3 = d.getBytes("ISO8859_1");

String str3 = new String(b3,"GBK");

*/

new BasicFile().WriteFile("/usr/local/stockdata/basictitle.txt",t);

//new BasicFile().WriteFile("/usr/local/stockdata/btit.txt",t);

new BasicFile().WriteFile("/usr/local/stockdata/basictime.txt",s);

//new BasicFile().WriteFile("/usr/local/stockdata/btim.txt",s);

new BasicFile().WriteFile("/usr/local/stockdata/basicinfo.txt",d);

//new BasicFile().WriteFile("/usr/local/stockdata/bi.txt",d);

}

ArrayList al = new BasicFile().ReadFile("/usr/local/stockdata/basictitle.txt");

//ArrayList al = new BasicFile().ReadFile("/usr/local/stockdata/btit.txt");

ArrayList time = new BasicFile().ReadFile("/usr/local/stockdata/basictime.txt");

//ArrayList time = new BasicFile().ReadFile("/usr/local/stockdata/btim.txt");

ArrayList info = new BasicFile().ReadFile("/usr/local/stockdata/basicinfo.txt");

//ArrayList info = new BasicFile().ReadFile("/usr/local/stockdata/bi.txt");

int a_size = al.size();

for(int i=0; i

{

out.println("

"+al.get(i)+"");

out.println("

"+ time.get(i)+"");

out.println("

"+info.get(i)+"");

out.println("

");

}

%>

Add Basic News :
Title:
Title:
Content:

[org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 23 in the generated java fileThe method getJspApplicationContext