filecaptureresponsewrapper.java

java生成图形验证码源代码

/**
 * 
 */
package com.filter;

import java.io.CharArrayWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;

/**
 * @author Administrator
 *
 */
public class FileCaptureResponseWrapper extends HttpServletResponseWrapper {
	  private   CharArrayWriter   output;   
	  public   String   toString()   
	  {   
	  return   output.toString();   
	  }   
	  public   FileCaptureResponseWrapper(HttpServletResponse   response)   
	  {   
	  super(response);   
	  output   =   new   CharArrayWriter();   
	  }   
	  public   PrintWriter   getWriter()   
	  {   
	  return   new   PrintWriter(output);   
	  }   
	  public   void   writeFile(String   fileName)   
	  throws   IOException   
	  {   
	  FileWriter   fw   =   new   FileWriter(fileName);   
	  fw.write(   output.toCharArray()   );   
	  fw.close();   
	  }   
	  public   void   writeResponse(PrintWriter   out)   
	  {   
	  out.print(   output.toCharArray()   );   
	  }   
  
}