bytearrayresponsewrapper.java

来自「一个用java编写的功能强大的OA系统」· Java 代码 · 共 72 行

package com.redmoon.oa;

import javax.servlet.http.*;
import java.io.ByteArrayOutputStream;
import java.io.*;
import javax.servlet.*;

public class ByteArrayResponseWrapper extends HttpServletResponseWrapper {
  private ByteArrayOutputStream output;
  private int contentLength;
  private String contentType;

  public ByteArrayResponseWrapper(HttpServletResponse response) {
    super(response);
    output=new ByteArrayOutputStream();
  }

  public byte[] getData() {
    return output.toByteArray();
  }

  public ServletOutputStream getOutputStream() {
    return new FilterServletOutputStream(output);
  }

  public PrintWriter getWriter() {
    return new PrintWriter(getOutputStream(),true);
  }

  public void setContentLength(int length) {
    this.contentLength = length;
    super.setContentLength(length);
  }

  public int getContentLength() {
    return contentLength;
  }

  public void setContentType(String type) {
    this.contentType = type;
    super.setContentType(type);
  }


  public String getContentType() {
    return contentType;
  }
}

class FilterServletOutputStream extends ServletOutputStream {

  private DataOutputStream stream;

  public FilterServletOutputStream(OutputStream output) {
    stream = new DataOutputStream(output);
  }

  public void write(int b) throws IOException  {
    stream.write(b);
  }

  public void write(byte[] b) throws IOException  {
    stream.write(b);
  }

  public void write(byte[] b, int off, int len) throws IOException  {
    stream.write(b,off,len);
  }

}