📄 iofileservlet.java
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import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ioFileServlet extends HttpServlet
{
public String codeToString(String str)
{//处理中文字符串的函数
String s=str;
try
{
byte tempB[]=s.getBytes("ISO-8859-1");
s=new String(tempB);
return s;
}
catch(Exception e)
{
return s;
}
}
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
public void doPost(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException
{
//设置mime
response.setContentType("text/html;charset=GB2312");
PrintWriter out=response.getWriter();
out.println("<HTML><head><title>接收新用户注册</title></head><BODY>");
//把提交的文件内容写入文件
int RowSize=30;//文件每行的字符数
String tempString1=null;
String tempString2=null;
tempString1=codeToString(request.getParameter("file_content"));
if(tempString1!=null)
{
File tempFile1=new File("d:/fileContent.txt");
FileWriter outfile1=new FileWriter(tempFile1,true);
BufferedWriter outbuffer1=new BufferedWriter(outfile1);
int writeStringLength=tempString1.length();
for(int i=0;i<writeStringLength/RowSize+1;i++)
{
if((i+1)*20<writeStringLength)
{
tempString2=tempString1.substring(i*RowSize,(i+1)*RowSize);
}
else
{
tempString2=tempString1.substring(i*RowSize,writeStringLength);
}
outbuffer1.write(tempString2);
outbuffer1.newLine();
}
outbuffer1.flush();
outbuffer1.close();
outfile1.close();
}
out.println("写入的文件内容是：<br>");
//从文件中读取内容
File f=new File("d:/fileContent.txt");
if(f.exists())
{
FileReader fileReader1=new FileReader(f);
BufferedReader buffer1=new BufferedReader(fileReader1);
byte bufferArray[]=new byte[90];
String tempString=null;
while((tempString=buffer1.readLine())!=null)
{
out.println(tempString+"<br>");
}
buffer1.close();
fileReader1.close();
}
else
{
out.println("故事中暂时没有内容。");
}
out.println("</body> </html>");
}
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